And so my attempt to have a performance test dr...

And so my attempt to have a performance test draws the final curtain, no
review.

1 files changed, 38 insertions, 0 deletions

diff --git a/test/disabled/run/bug4279.scala b/test/disabled/run/bug4279.scala
new file mode 100644
index 0000000000..d0afc3a032
--- /dev/null
+++ b/test/disabled/run/bug4279.scala
@@ -0,0 +1,38 @@
+import scala.tools.partest._
+
+// Attempting to verify slice isn't 100,000x slower
+// with views than non-views.
+class Runner(num: Int, reps: Int) extends TestUtil {
+  var dummy = 0
+  val range = Array.range(0, num)
+
+  def iteratorSlice = {
+    def it = range.iterator.slice(num - 2, num)
+    for (i <- 1 to reps)
+      it foreach (dummy = _)
+  }
+  def viewSlice = {
+    val view = range.view.slice(num - 2, num)
+    for (i <- 1 to reps)
+      view foreach (dummy = _)
+  }
+  def straightSlice = {
+    val xs = range.slice(num - 2, num)
+    for (i <- 1 to reps)
+      xs foreach (dummy = _)
+  }
+  def run(multiple: Double) = {
+    verifySpeed(straightSlice, iteratorSlice, multiple)
+    verifySpeed(straightSlice, viewSlice, multiple)
+  }
+}
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    // warmup
+    { val r = new Runner(1000000, 10) ; r.straightSlice ; r.iteratorSlice ; r.viewSlice }
+
+    new Runner(10000000, 10) run 500
+    new Runner(10000000, 50) run 300
+  }
+}