ProcessBuilder showdown!

processbuilder_creation.scala

/*
 * Copyright (C) 2015 Typesafe Inc. <http://www.typesafe.com>
 */

package akka.benchmarks

import java.util.concurrent.TimeUnit

import org.openjdk.jmh.annotations._

/*
This benchmark can be run using https://github.com/ktoso/sbt-jmh

[info] Benchmark                         Mode  Cnt  Score   Error  Units
[info] ProcessBenchmark.java_pb_create   avgt   20  1.683 ± 0.017  ms/op
[info] ProcessBenchmark.scala_pb_create  avgt   20  2.018 ± 0.109  ms/op

[info] ProcessBenchmark.java_pb_wait     avgt   20  4.046 ± 0.148  ms/op
[info] ProcessBenchmark.scala_pb_wait    avgt   20  4.169 ± 0.263  ms/op
 */
@State(Scope.Benchmark)
@BenchmarkMode(Array(Mode.AverageTime))
@OutputTimeUnit(TimeUnit.MICROSECONDS)
class ProcessBenchmark {

  implicit val system = ActorSystem("test")

  @TearDown
  def shutdown() {
    system.shutdown()
    system.awaitTermination()
  }

  @Benchmark
  def java_pb_wait(): Int = {
    new java.lang.ProcessBuilder("ls").start().waitFor()
  }

  @Benchmark
  def scala_pb_wait(): Int = {
    import scala.sys.process._
    """ls""".!(ProcessLogger(_ ⇒ (), _ ⇒ ()))
  }


  @Benchmark
  def java_pb_create(): Process = {
    new java.lang.ProcessBuilder("ls").start()
  }

  @Benchmark
  def scala_pb_create(): scala.sys.process.Process = {
    import scala.sys.process._
    """ls""".run(ProcessLogger(_ ⇒ (), _ ⇒ ()))
  }

}