1 files changed, 48 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/MainBench.scala b/src/compiler/scala/tools/nsc/MainBench.scala
new file mode 100644
index 0000000000..0037de7b94
--- /dev/null
+++ b/src/compiler/scala/tools/nsc/MainBench.scala
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+/* NSC -- new Scala compiler
+ * Copyright 2005-2011 LAMP/EPFL
+ * @author  Martin Odersky
+ */
+
+package scala.tools.nsc
+
+import java.io.File
+import File.pathSeparator
+
+import scala.tools.nsc.interactive.{ RefinedBuildManager, SimpleBuildManager }
+import scala.tools.nsc.io.AbstractFile
+import scala.tools.nsc.reporters.{Reporter, ConsoleReporter}
+import scala.reflect.internal.util.{ BatchSourceFile, FakePos } //{Position}
+import Properties.{ versionString, copyrightString, residentPromptString, msilLibPath }
+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")
+  }
+}