Benchmark Real com PostgreSQL, HikariCP e k6

Virtual Threads

Introdução

Desde o lançamento das Virtual Threads no Java 21 através da JEP 444, muita gente começou a repetir a mesma frase:

"Virtual Threads deixam sua aplicação mais rápida."

Mas será que isso é verdade?

A resposta curta é:

depende do workload
depende do gargalo
e principalmente do que você está medindo

Para entender isso de forma prática, montei um benchmark real comparando:

Platform Threads
Virtual Threads

Usando:

Java 25
PostgreSQL
HikariCP
k6
workload HTTP + acesso real ao banco

O objetivo foi medir:

throughput
latência
tail latency (p95)
comportamento sob saturação

Repositório do projeto: HttpServer JDK built-in

E se você gostou, me deixe uma estrelinha ⭐

Ambiente do benchmark

Stack utilizada

Tecnologia	Versão
Java	25
PostgreSQL	Local
HikariCP	Pool limitado
k6	Load testing
HttpServer	JDK built-in

Arquitetura do teste

O servidor foi implementado usando o HttpServer da própria JDK.

A ideia foi manter:

mínimo overhead
foco total no modelo de threading

flowchart TD A[Client k6] --> B[HTTP Server JDK HttpServer] B --> C{Executor} C --> D[Virtual Threads
Project Loom] C --> E[Platform Threads
Fixed Thread Pool] D --> F[PostgreSQL] E --> F F --> G[HikariCP
Limited Pool]

Configuração do servidor

&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">private</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">static</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">void</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-title function_&amp;quot;&lt;/span&gt;&amp;gt;startWebServer&amp;lt;/span&amp;gt;&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-params&amp;quot;&lt;/span&gt;&amp;gt;(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-type&quot;</span>&gt;<span class="hljs-type">boolean</span>&lt;/span&gt;&amp;lt;/span&amp;gt; virtual, &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-type&quot;</span>&gt;<span class="hljs-type">boolean</span>&lt;/span&gt;&amp;lt;/span&amp;gt; withLock)&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">throws</span>&lt;/span&gt;&amp;lt;/span&amp;gt; IOException {
    &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;HttpServer&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-variable&amp;quot;&lt;/span&gt;&amp;gt;httpServer&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-operator&amp;quot;&lt;/span&gt;&amp;gt;=&amp;lt;/span&amp;gt; HttpServer.create(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">new</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-title class_&amp;quot;&lt;/span&gt;&amp;gt;InetSocketAddress&amp;lt;/span&amp;gt;(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-number&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-number&quot;</span>&gt;<span class="hljs-number">8001</span>&lt;/span&gt;&amp;lt;/span&amp;gt;), &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-number&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-number&quot;</span>&gt;<span class="hljs-number">0</span>&lt;/span&gt;&amp;lt;/span&amp;gt;);

    httpServer.createContext(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;/caramelo&amp;amp;quot;&amp;lt;/span&amp;gt;, &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">new</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-title class_&amp;quot;&lt;/span&gt;&amp;gt;WebServerHandler&amp;lt;/span&amp;gt;(withLock));

    &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">if</span>&lt;/span&gt;&amp;lt;/span&amp;gt; (virtual) {
        httpServer.setExecutor(Executors.newVirtualThreadPerTaskExecutor());
    } &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">else</span>&lt;/span&gt;&amp;lt;/span&amp;gt; {
        httpServer.setExecutor(Executors.newFixedThreadPool(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-number&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-number&quot;</span>&gt;<span class="hljs-number">200</span>&lt;/span&gt;&amp;lt;/span&amp;gt;));
    }

    httpServer.start();
}

Simulação de workload real

O benchmark não utilizou apenas Thread.sleep().

Foi utilizado acesso real ao PostgreSQL via JDBC.

Database Service

&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">public</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;class&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-title class_&amp;quot;&lt;/span&gt;&amp;gt;DatabaseService&amp;lt;/span&amp;gt; {

    &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">private</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">static</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">final</span>&lt;/span&gt;&amp;lt;/span&amp;gt; HikariDataSource dataSource;

    &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">static</span>&lt;/span&gt;&amp;lt;/span&amp;gt; {
        &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">var</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-variable&amp;quot;&lt;/span&gt;&amp;gt;config&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-operator&amp;quot;&lt;/span&gt;&amp;gt;=&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">new</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-title class_&amp;quot;&lt;/span&gt;&amp;gt;HikariConfig&amp;lt;/span&amp;gt;();

        config.setJdbcUrl(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;jdbc:postgresql:&lt;span class=<span class="hljs-string">&quot;hljs-comment&quot;</span>&gt;<span class="hljs-comment">//localhost:5432/test&amp;amp;quot;&amp;lt;/span&amp;gt;);&lt;/span&gt;</span>
        config.setUsername(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;postgres&amp;amp;quot;&amp;lt;/span&amp;gt;);
        config.setPassword(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;password&amp;amp;quot;&amp;lt;/span&amp;gt;);

        &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-comment&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-comment&quot;</span>&gt;<span class="hljs-comment">// gargalo controlado&amp;lt;/span&amp;gt;&lt;/span&gt;</span>
        config.setMaximumPoolSize(&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-number&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-number&quot;</span>&gt;<span class="hljs-number">100</span>&lt;/span&gt;&amp;lt;/span&amp;gt;);

        dataSource = &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">new</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-title class_&amp;quot;&lt;/span&gt;&amp;gt;HikariDataSource&amp;lt;/span&amp;gt;(config);
    }

    &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">public</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">static</span>&lt;/span&gt;&amp;lt;/span&amp;gt; String &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-title function_&amp;quot;&lt;/span&gt;&amp;gt;query&amp;lt;/span&amp;gt;&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-params&amp;quot;&lt;/span&gt;&amp;gt;()&amp;lt;/span&amp;gt; {
		&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-comment&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-comment&quot;</span>&gt;<span class="hljs-comment">// Você pode testar de forma deterministica ou real, direto em uma tabela do Postgres&amp;lt;/span&amp;gt;&lt;/span&gt;</span>
		&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-type&quot;</span>&gt;<span class="hljs-type">boolean</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-variable&amp;quot;&lt;/span&gt;&amp;gt;deterministic&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-operator&amp;quot;&lt;/span&gt;&amp;gt;=&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-literal&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-literal&quot;</span>&gt;<span class="hljs-literal">true</span>&lt;/span&gt;&amp;lt;/span&amp;gt;;
        &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;String&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-variable&amp;quot;&lt;/span&gt;&amp;gt;sql&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-operator&amp;quot;&lt;/span&gt;&amp;gt;=&amp;lt;/span&amp;gt; deterministic
                ? &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;SELECT &lt;span class=<span class="hljs-string">&quot;hljs-title function_&quot;</span>&gt;pg_sleep&lt;/span&gt;&lt;span class=<span class="hljs-string">&quot;hljs-params&quot;</span>&gt;(&lt;span class=<span class="hljs-string">&quot;hljs-number&quot;</span>&gt;<span class="hljs-number">0.2</span>&lt;/span&gt;)&lt;/span&gt;&amp;amp;quot;&amp;lt;/span&amp;gt;
                : &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;SELECT * FROM carro&amp;amp;quot;&amp;lt;/span&amp;gt;;
				
        &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">try</span>&lt;/span&gt;&amp;lt;/span&amp;gt; (&amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;Connection&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-variable&amp;quot;&lt;/span&gt;&amp;gt;conn&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-operator&amp;quot;&lt;/span&gt;&amp;gt;=&amp;lt;/span&amp;gt; dataSource.getConnection();
             &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">var</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-variable&amp;quot;&lt;/span&gt;&amp;gt;stmt&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-operator&amp;quot;&lt;/span&gt;&amp;gt;=&amp;lt;/span&amp;gt; conn.createStatement()) {

            &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-type&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">var</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-variable&amp;quot;&lt;/span&gt;&amp;gt;rs&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-operator&amp;quot;&lt;/span&gt;&amp;gt;=&amp;lt;/span&amp;gt; stmt.executeQuery(sql);

            &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">if</span>&lt;/span&gt;&amp;lt;/span&amp;gt; (rs.next()) {
                &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">return</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;OK_DB&amp;amp;quot;&amp;lt;/span&amp;gt;;
            }

        } &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">catch</span>&lt;/span&gt;&amp;lt;/span&amp;gt; (Exception e) {
            &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">return</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;ERROR&amp;amp;quot;&amp;lt;/span&amp;gt;;
        }

        &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/span&gt;&amp;gt;&lt;span class=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">return</span>&lt;/span&gt;&amp;lt;/span&amp;gt; &amp;lt;span class=&lt;span class=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;&amp;quot;hljs-string&amp;quot;&lt;/span&gt;&amp;gt;&amp;amp;quot;OK_DB&amp;amp;quot;&amp;lt;/span&amp;gt;;
    }
}

Por que limitar o HikariCP?

Essa foi a parte mais importante do benchmark.

Sem um recurso limitado, o teste ficaria artificial.

O pool de conexões foi limitado para:

100 conexões

Isso criou um gargalo real.

Ferramenta de carga

O benchmark foi executado usando k6.

Script utilizado

&amp;lt;span &lt;span <span class="hljs-keyword">class</span>=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">class</span>&lt;<span class="hljs-regexp">/span&gt;=&lt;span class=&quot;hljs-string&quot;&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/</span>span&gt;&amp;gt;<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;</span>import<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>&amp;lt;<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-regexp&quot;</span>&gt;</span>/span<span class="hljs-symbol">&amp;gt;</span> http <span class="hljs-symbol">&amp;lt;</span>span class=<span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-symbol">&amp;gt;</span>from<span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>span&amp;gt; <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-string<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-symbol&quot;</span>&gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>k6/http<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-symbol&quot;</span>&gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>;
<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>import<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> { check, sleep } &amp;lt;span &lt;span <span class="hljs-keyword">class</span>=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">class</span>&lt;<span class="hljs-regexp">/span&gt;=&lt;span class=&quot;hljs-string&quot;&gt;&amp;quot;hljs-keyword&amp;quot;&lt;/</span>span&gt;&amp;gt;<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;</span>from<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>&amp;lt;<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-regexp&quot;</span>&gt;</span>/span<span class="hljs-symbol">&amp;gt;</span> <span class="hljs-symbol">&amp;lt;</span>span class=<span class="hljs-symbol">&amp;quot;</span>hljs-string<span class="hljs-symbol">&amp;quot;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;k6<span class="hljs-symbol">&amp;amp;</span>#x27;<span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>span&amp;gt;;

<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>export<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>const<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> options = {
  <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-attr<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>vus<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>: <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-number<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>500<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>,
  <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-attr<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>duration<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>: <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-string<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-symbol&quot;</span>&gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>30s<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-symbol&quot;</span>&gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>,
};

<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>export<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>default<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>function<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> (<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-params<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>) {
  <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-keyword<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>const<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> res = http.&amp;lt;span &lt;span <span class="hljs-keyword">class</span>=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">class</span>&lt;<span class="hljs-regexp">/span&gt;=&lt;span class=&quot;hljs-string&quot;&gt;&amp;quot;hljs-title function_&amp;quot;&lt;/</span>span&gt;&amp;gt;get&amp;lt;<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-regexp&quot;</span>&gt;</span>/span<span class="hljs-symbol">&amp;gt;</span>(<span class="hljs-symbol">&amp;lt;</span>span class=<span class="hljs-symbol">&amp;quot;</span>hljs-string<span class="hljs-symbol">&amp;quot;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;http:/<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span><span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-regexp&quot;</span>&gt;</span>/localhost:8001/<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>caramelo&amp;amp;#x27;&amp;lt;/span&amp;gt;);

  <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-title function_<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>check<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>(res, {
    <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-string<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-symbol&quot;</span>&gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>status is 200<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-symbol&quot;</span>&gt;</span><span class="hljs-symbol">&amp;amp;</span>#x27;<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>: <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-function<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>(<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-params<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>r<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>) =<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-symbol&quot;</span>&gt;</span><span class="hljs-symbol">&amp;amp;</span>gt;<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span> r.&amp;lt;span &lt;span <span class="hljs-keyword">class</span>=<span class="hljs-string">&quot;hljs-keyword&quot;</span>&gt;<span class="hljs-keyword">class</span>&lt;<span class="hljs-regexp">/span&gt;=&lt;span class=&quot;hljs-string&quot;&gt;&amp;quot;hljs-property&amp;quot;&lt;/</span>span&gt;&amp;gt;status&amp;lt;<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-regexp&quot;</span>&gt;</span>/span<span class="hljs-symbol">&amp;gt;</span> === <span class="hljs-symbol">&amp;lt;</span>span class=<span class="hljs-symbol">&amp;quot;</span>hljs-number<span class="hljs-symbol">&amp;quot;</span><span class="hljs-symbol">&amp;gt;</span>200<span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>span&amp;gt;,
  });

  <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-title function_<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>sleep<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>(<span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;language-xml&quot;</span>&gt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span><span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span> <span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-attr&quot;</span>&gt;</span>class<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>=<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-string&quot;</span>&gt;</span><span class="hljs-symbol">&amp;quot;</span>hljs-number<span class="hljs-symbol">&amp;quot;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span>0.1<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-tag&quot;</span>&gt;</span><span class="hljs-symbol">&amp;lt;</span>/<span class="hljs-tag">&lt;<span class="hljs-name">span</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;hljs-name&quot;</span>&gt;</span>span<span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-symbol">&amp;gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">span</span>&gt;</span></span>);
}

O que foi medido

Para cada cenário:

throughput
p95
estabilidade
comportamento sob concorrência

Os testes foram executados com:

VUs
50
100
200
300
400
500

Resultados consolidados

Model	VUs	p95	Throughput
Virtual Threads	50	219ms	158 req/s
Virtual Threads	100	220ms	317 req/s
Virtual Threads	200	345ms	460 req/s
Virtual Threads	300	566ms	461 req/s
Virtual Threads	400	841ms	458 req/s
Virtual Threads	500	996ms	460 req/s
Platform Threads	50	344ms	139 req/s
Platform Threads	100	217ms	317 req/s
Platform Threads	200	350ms	458 req/s
Platform Threads	300	1.43s	472 req/s
Platform Threads	400	1.78s	467 req/s
Platform Threads	500	2s	467 req/s

O que os números mostram

1. Throughput ficou praticamente igual

Esse foi o primeiro insight importante.

Mesmo usando Virtual Threads:

o throughput não aumentou drasticamente

Por quê?

Porque o gargalo principal continuou sendo:

PostgreSQL
HikariCP
I/O externo

Ou seja:

Virtual Threads não fazem milagre quando o recurso externo continua limitado.

2. A diferença apareceu na latência de cauda

A partir de ~300 VUs, o comportamento mudou completamente.

Virtual Threads

VUs	p95
300	566ms
400	841ms
500	996ms

Crescimento:

gradual
previsível
controlado

Platform Threads

VUs	p95
300	1.43s
400	1.78s
500	2s

Aqui a cauda começou a explodir.

3. O comportamento sob saturação

Até ~200 VUs:

os dois modelos se comportaram de forma muito parecida

Isso mostra que:

abaixo da saturação, o modelo de threading importa pouco

Após ~300 VUs

O sistema começou a entrar em fila.

E foi exatamente nesse momento que:

scheduler (agendar execução das threads, em Platform Threads o scheduler principal é do: sistema operacional)
fairness (justiça na distribuição de execução, ou seja, as requisições recebem tempo de execução de forma equilibrada?)
modelo de execução

passaram a importar.

Resumo técnico simples:

Conceito	Significado
Scheduler	decide quem executa
Fairness	quão equilibrada é a distribuição
Starvation	threads esquecidas esperando demais

O principal resultado do benchmark

As Virtual Threads não aumentaram significativamente o throughput.

Mas elas:

reduziram tail latency
reduziram extremos
mantiveram maior estabilidade
degradaram de forma muito mais previsível

Por que isso acontece?

Platform Threads dependem diretamente de threads do sistema operacional.

Sob alta concorrência:

context switch aumenta
starvation aparece
algumas requisições ficam presas por muito tempo

Resultado:

spikes
cauda longa
latência imprevisível

Já as Virtual Threads

Como são extremamente leves:

podem estacionar facilmente
liberam carrier threads
reduzem contenção pesada do scheduler do SO

Resultado:

menor p95
menor tail latency
distribuição mais homogênea

O benchmark confirmou exatamente a JEP 444

A proposta das Virtual Threads nunca foi:

&amp;amp;quot;fazer CPU ficar mais rápida&amp;amp;quot;

A proposta sempre foi:

melhorar concorrência e escalabilidade de workloads bloqueantes

E foi exatamente isso que apareceu no benchmark.

Conclusão

O benchmark demonstrou algo muito importante:

Virtual Threads não removem gargalos externos.

Se o banco continua limitado:

throughput continuará limitado

Mas elas melhoram significativamente:

estabilidade
fairness
tail latency
comportamento sob saturação

Resultado final

Característica	Virtual Threads	Platform Threads
Throughput	Similar	Similar
Escalabilidade	Melhor	Pior
Tail latency	Muito melhor	Muito pior
Estabilidade	Alta	Média
Degradação sob saturação	Suave	Agressiva

Considerações finais

O mais interessante desse benchmark é que ele foi executado em um cenário relativamente simples.

Mesmo assim:

o comportamento emergente ficou muito claro
a saturação apareceu de forma natural
e o impacto do modelo de threading ficou evidente

Em workloads:

I/O bound
bloqueantes
altamente concorrentes

Virtual Threads entregam exatamente o que o Loom prometeu:

concorrência massiva com menor custo operacional

Referências

JEP 444 - Virtual Threads
Java 21/25
Project Loom
HikariCP
PostgreSQL
k6

Publicado por: Guilherme Gomes - 10/05/2026 15:08

Caramelo.dev

Virtual Threads vs Platform Threads no Java 25

Benchmark Real com PostgreSQL, HikariCP e k6

Introdução

Ambiente do benchmark

Stack utilizada

Arquitetura do teste

Configuração do servidor

Simulação de workload real

Database Service

Por que limitar o HikariCP?

Ferramenta de carga

Script utilizado

O que foi medido

Resultados consolidados

O que os números mostram

1. Throughput ficou praticamente igual

2. A diferença apareceu na latência de cauda

Virtual Threads

Platform Threads

3. O comportamento sob saturação

Após ~300 VUs

O principal resultado do benchmark

Por que isso acontece?

Já as Virtual Threads

O benchmark confirmou exatamente a JEP 444

Conclusão

Resultado final

Considerações finais

Referências

Virtual Threads vs Platform Threads no Java 25

Benchmark Real com PostgreSQL, HikariCP e k6

Introdução

Ambiente do benchmark

Stack utilizada

Arquitetura do teste

Configuração do servidor

Simulação de workload real

Database Service

Por que limitar o HikariCP?

Ferramenta de carga

Script utilizado

O que foi medido

Resultados consolidados

O que os números mostram

1. Throughput ficou praticamente igual

2. A diferença apareceu na latência de cauda

Virtual Threads

Platform Threads

3. O comportamento sob saturação

Após ~300 VUs

O principal resultado do benchmark

Por que isso acontece?

Já as Virtual Threads

O benchmark confirmou exatamente a JEP 444

Conclusão

Resultado final

Considerações finais

Referências

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