perf.gradle

apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'com.github.johnrengelman.shadow'


idea {
    module {
        scopes.PROVIDED.plus += [project.configurations.perfCompile]
    }
}

task prepbench(dependsOn: perfClasses) {

    shadowJar {
        classifier = "benchmarks"

        from sourceSets.perf.output
        from sourceSets.main.output
        from project.configurations.perfRuntime

        shadowJar.doFirst {
            shadowJar.manifest.attributes.put("Main-Class", "org.openjdk.jmh.Main")
        }
    }

    doLast {
        shadowJar.execute()
    }
}

task perf(type: JavaExec) {
    main = 'org.openjdk.jmh.Main'
    classpath = project.sourceSets.perf.runtimeClasspath
    maxHeapSize = "512m"
    jvmArgs '-XX:+UnlockCommercialFeatures'
    jvmArgs '-XX:+FlightRecorder'

    if (project.hasProperty('jmh')) {
        args(project.jmh.split(' '))
    } else {
        //args '-h' // help output
        args '-f' // fork
        args '1'
        args '-wi' // warmup iterations
        args '7'
        args '-i' // test iterations
        args '5'
        args '-r' // time per execution in seconds
        args '5'
        //args '-prof' // profilers
        //args 'HS_GC' // HotSpot (tm) memory manager (GC) profiling via implementation-specific MBeans
        //args 'HS_RT' // HotSpot (tm) runtime profiling via implementation-specific MBeans
        //args 'HS_THR' // HotSpot (tm) threading subsystem via implementation-specific MBeans
        //args 'HS_COMP' // HotSpot (tm) JIT compiler profiling via implementation-specific MBeans
        //args 'HS_CL' // HotSpot (tm) classloader profiling via implementation-specific MBeans
        //args 'STACK' // Simple and naive Java stack profiler
    }
}