Added an overridable setUp method that is called prior to each benchmarking (but whose execution time is not measured).

git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@22806 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

src/library/scala/testing/Benchmark.scala

@@ -52,6 +52,7 @@ trait Benchmark {
    */
   def runBenchmark(noTimes: Int): List[Long] =
     for (i <- List.range(1, noTimes + 1)) yield {
+      setUp
       val startTime = Platform.currentTime
       var i = 0; while (i < multiplier) {
         run()
@@ -63,6 +64,12 @@ trait Benchmark {
       stopTime - startTime
     }
 
+  /** Prepare any data needed by the benchmark, but which should not
+   *  be measured.
+   */
+  def setUp {
+  }
+
   /** a string that is written at the beginning of the output line
    *   that contains the timings. By default, this is the class name.
    */