scalajs-bench.scala

/*
  Basic scala.js flatMap benchmarks.
  Results on a 2015 Mac Book Pro
  
  Scala.js 0.6.33/Firefox => 222ms
  Scala.js 0.6.33/Chrome => 14ms
  Scala.js 1.2.0/Firefox (ES 2015) => 310ms
  Scala.js 1.2.0/Chrome (ES 2015) => 13ms
  Scala.js 1.2.0/Firefox (ES 5.1)=> 137ms
  Scala.js 1.2.0/Chrome (ES 5.1)=> 13ms
*/

package tutorial.webapp

object TutorialApp {

  val numberList = List.fill(1000000)(1)
  
  def benchmark(): Long = {
    val start = System.currentTimeMillis()
    numberList.foldLeft(Option(0)) {case (acc, x) => acc.flatMap(_ => Some(x))}
    val end = System.currentTimeMillis()
    end - start
  }

  def main(args: Array[String]): Unit = {
    val runs = (1 to 10).map(_ => benchmark())
    println("Runs: " + runs.mkString("\n"))
    println("Avg: " + (runs.sum / 10))
  }
}