plugins {
  id "me.champeau.gradle.jmh" version "0.5.0"
}

apply from: "$rootDir/gradle/java.gradle"

dependencies {
  jmh deps.opentelemetryApi
  jmh deps.bytebuddyagent

  jmh 'javax.servlet:javax.servlet-api:4.0.1'
  jmh 'com.google.http-client:google-http-client:1.19.0'
  jmh 'org.eclipse.jetty:jetty-server:9.4.1.v20170120'
  jmh 'org.eclipse.jetty:jetty-servlet:9.4.1.v20170120'

  // used to provide lots of classes for TypeMatchingBenchmark
  jmh 'org.springframework:spring-web:4.3.28.RELEASE'
}

jmh {
  timeUnit = 'ms' // Output time unit. Available time units are: [m, s, ms, us, ns].
  benchmarkMode = ['avgt']
  timeOnIteration = '20s'
  iterations = 1 // Number of measurement iterations to do.
  fork = 1 // How many times to forks a single benchmark. Use 0 to disable forking altogether
//  jvmArgs += ["-XX:+UnlockDiagnosticVMOptions", "-XX:+DebugNonSafepoints", "-XX:StartFlightRecording=delay=5s,dumponexit=true,name=jmh-benchmark,filename=$rootDir/benchmark/build/reports/jmh/jmh-benchmark.jfr"]
//  jvmArgs += ["-agentpath:$rootDir/benchmark/src/jmh/resources/libasyncProfiler.so=start,collapsed,file=$rootDir/benchmark/build/reports/jmh/profiler.txt"]

  // Should JMH fail immediately if any benchmark had experienced the unrecoverable error?
  failOnError = true
  warmup = '5s' // Time to spend at each warmup iteration.
//  warmupBatchSize = 10 // Warmup batch size: number of benchmark method calls per operation.
  // How many warmup forks to make for a single benchmark. 0 to disable warmup forks.
  warmupForks = 0
  warmupIterations = 1 // Number of warmup iterations to do.

//  profilers = ['stack:lines=5;detailLine=true;period=5;excludePackages=true']
  // Use profilers to collect additional data. Supported profilers: [cl, comp, gc, stack, perf, perfnorm, perfasm, xperf, xperfasm, hs_cl, hs_comp, hs_gc, hs_rt, hs_thr]
  profilers = ['io.opentelemetry.benchmark.UsedMemoryProfiler', 'gc']

//  humanOutputFile = project.file("${project.buildDir}/reports/jmh/human.txt") // human-readable output file
//  operationsPerInvocation = 10 // Operations per invocation.
//  synchronizeIterations = false // Synchronize iterations?
  timeout = '5s' // Timeout for benchmark iteration.
//  includeTests = false
  // Allows to include test sources into generate JMH jar, i.e. use it when benchmarks depend on the test classes.

  duplicateClassesStrategy = DuplicatesStrategy.EXCLUDE
  jmhVersion = '1.23' // Specifies JMH version
}

tasks.jmh.dependsOn(':javaagent:shadowJar')

/*
If using libasyncProfiler, use the following to generate nice svg flamegraphs.
sed '/unknown/d' benchmark/build/reports/jmh/profiler.txt | sed '/^thread_start/d' | sed '/not_walkable/d' > benchmark/build/reports/jmh/profiler-cleaned.txt
(using https://github.com/brendangregg/FlameGraph)
./flamegraph.pl --color=java benchmark/build/reports/jmh/profiler-cleaned.txt > benchmark/build/reports/jmh/jmh-main.svg
 */

