Parallel collections -- a thing. Results: ..... Series took 100402ms. ..... Parallel took 12868ms.

gistfile1.scala

import scala.collection.parallel.immutable.ParRange

object Parallel extends App {
  val bigSet = 1 to 500

  val start = System.currentTimeMillis()
  bigSet.foreach { i =>
    Thread.sleep(200)
    if (i % 100 == 0) print(".")
  }
  println("\nSeries took %sms.".format((System.currentTimeMillis() - start)))

  val start2 = System.currentTimeMillis()
  new ParRange(bigSet).foreach { i =>
    Thread.sleep(200)
    if (i % 100 == 0) print(".")
  }
  println("\nParallel took %sms.".format((System.currentTimeMillis() - start2)))

}