Scala example source code file (MainBench.scala)

This example Scala source code file (MainBench.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

array, compiler, driver, evalloop, global, mainbench, nbest, niter, niter-1, nsc, reflection, utilities

The MainBench.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author  Martin Odersky
 */

package scala.tools.nsc

import scala.reflect.internal.util.Statistics

/** The main class for NSC, a compiler for the programming
 *  language Scala.
 */
object MainBench extends Driver with EvalLoop {

  lazy val theCompiler = Global(settings, reporter)

  override def newCompiler() = theCompiler

  val NIter = 50
  val NBest = 10

  override def main(args: Array[String]) = {
    val times = new Array[Long](NIter)
    var start = System.nanoTime()
    for (i <- 0 until NIter) {
      if (i == NIter-1) {
        theCompiler.settings.Ystatistics.value = true
        Statistics.enabled = true
      }
      process(args)
      val end = System.nanoTime()
      val duration = (end-start)/1000000
      println(s"${duration}ms")
      times(i) = duration
      start = end
    }
    val avg = times.sorted.take(NBest).sum / NBest
    println(s"avg shortest $NBest times ${avg}ms")
  }
}