java-benchmark/src/main/java/me/hao0/benchmark/JMHSample_16_CompilerControl.java at master · 75115200/java-benchmark · GitHub

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package me.hao0.benchmark;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.CompilerControl;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

import java.util.concurrent.TimeUnit;

/**
 * 使用@CompilerControl设置JVM的编译选型(HotSpot)
 */
@State(Scope.Thread)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class JMHSample_16_CompilerControl {

    public void target_blank() {
        // this method was intentionally left blank
    }

    /**
     * 编译时，不内联
     */
    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    public void target_dontInline() {
        // this method was intentionally left blank
    }

    /**
     * 编译时，内联
     */
    @CompilerControl(CompilerControl.Mode.INLINE)
    public void target_inline() {
        // this method was intentionally left blank
    }

    /**
     * 编译时，排除该方法
     */
    @CompilerControl(CompilerControl.Mode.EXCLUDE)
    public void target_exclude() {
        // this method was intentionally left blank
    }


    @Benchmark
    public void baseline() {
        // this method was intentionally left blank
    }

    @Benchmark
    public void blank() {
        target_blank();
    }

    @Benchmark
    public void dontinline() {
        target_dontInline();
    }

    @Benchmark
    public void inline() {
        target_inline();
    }

    @Benchmark
    public void exclude() {
        target_exclude();
    }

    public static void main(String[] args) throws RunnerException {
        Options opt = new OptionsBuilder()
                .include(JMHSample_16_CompilerControl.class.getSimpleName())
                .warmupIterations(1)
                .measurementIterations(3)
                .forks(1)
                .build();

        new Runner(opt).run();
    }

}