PerformanceMystery.scala

package net.strong_links.fawtests

import scala.collection._
import scala.collection.generic._

object testCollections extends App {

  import net.strong_links.core._

  def fmt(x: Double) = x.formatted("%.2f")

  def run(what: String, n: Long)(f: () => Any) = {
    val delta = Util.timerInSeconds(n)(f())
    val perSecond = (n.toDouble / delta)
    println("  > _: _ millions per second in _ seconds." << (what, fmt(perSecond / 1000000.0), fmt(delta)))
  }
  def test(title: String, f: () => PluggedString) {
    println(title)
    run("Create", 800000000L)(() => f())
    run("Invoke", 1000000L)(() => f().toString)
  }

  (0 to 5).foreach { _ =>
    test("One args", () => ("Hello _" << "Jacques"))
    test("Zero arg", () => ("Hello" << ()))
    test("Two args", () => ("Hello _ and _" << ("Jacques", "Maxime")))
    test("Four args", () => ("Hello _ _ and _ _" << ("Jacques", "Lemieux", "Maxime", "Lévesque")))
  }
}