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JMH: Java微基准测试

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Java Microbenchmark Harness

JMH 是 Java Microbenchmark Harness（微基准测试)

性能调优必备利器之 JMH - 武培轩 - 博客园 (cnblogs.com)

https://github.com/openjdk/jmh.git

测试项目构建

官方archetype

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mvn archetype:generate \
  -DinteractiveMode=false \
  -DarchetypeGroupId=org.openjdk.jmh \
  -DarchetypeArtifactId=jmh-java-benchmark-archetype \
  -DgroupId=com.tencent.demo.jmh \
  -DartifactId=jmh-log \
  -Dversion=1.0

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public class MyBenchmark {

    @Benchmark
    @BenchmarkMode(Mode.AverageTime)
    @Fork(value = 1)
    @Threads(value = 1)
    public void testMethod() {
        // This is a demo/sample template for building your JMH benchmarks. Edit as
        // needed.
        // Put your benchmark code here.
        LogBenchMarkWorker.getInstance().logBatch();
    }
}

使用

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mvn clean verify

运行

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java -jar target/benchmark.jar

JMH运行原理

大牛推荐的文献:

  1. https://shipilev.net
  2. https://shipilev.net/jvm/anatomy-quarks/