jdk/test/micro/org/openjdk/bench/java/lang/VirtualThreadSleep.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package org.openjdk.bench.java.lang;

import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.*;

@BenchmarkMode(Mode.Throughput)
@State(Scope.Benchmark)
@Warmup(iterations = 5, time = 10, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 5, time = 10, timeUnit = TimeUnit.SECONDS)
@Fork(value = 3)
//@OutputTimeUnit(TimeUnit.SECONDS)
public class VirtualThreadSleep {

    @Param({"1000", "10000", "100000"})
    int threadCount;

    @Benchmark
    public void sleep10() throws Exception {
        var threads = new Thread[threadCount];
        for (int i = 0; i < threadCount; i++) {
            threads[i] = Thread.ofVirtual().start(() -> {
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) { }
            });
        }
        for (Thread t : threads) {
            t.join();
        }
    }

    @Benchmark
    public void sleep10x10() throws Exception {
        var threads = new Thread[threadCount];
        for (int i = 0; i < threadCount; i++) {
            threads[i] = Thread.ofVirtual().start(() -> {
                try {
                    for (int k = 0; k < 10; k++) {
                        Thread.sleep(10);
                    }
                } catch (InterruptedException e) { }
            });
        }
        for (Thread t : threads) {
            t.join();
        }
    }
}