1 files changed, 46 insertions, 0 deletions
diff --git a/test/files/bench/equality/eqeq.scala b/test/files/bench/equality/eqeq.scala
new file mode 100755
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+++ b/test/files/bench/equality/eqeq.scala
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+/** benchmark for testing equality.
+ *  Mix: == between non-numbers ith Object.equals as equality: 66%
+ *          50% of these are tests where eq is true.
+ *       == between boxed integers: 17%
+ *       == between boxed characters: 5%
+ *       == between boxed bytes: 5%
+ *       == between boxed longs: 5%
+ *       == between boxed shorts: < 1%
+ *       == between boxed floats: < 1%
+ *       == between boxed doubles: < 1%
+ * In all cases 50% of the tests return true.
+ */
+object eqeq extends testing.Benchmark {
+
+  def eqeqtest[T](creator: Int => T, n: Int): Int = {
+    val elems = Array.tabulate[AnyRef](n)(i => creator(i % 2).asInstanceOf[AnyRef])
+
+    var sum = 0
+    var i = 0
+    while (i < n) {
+      var j = 0
+      while (j < n) {
+        if (elems(i) == elems(j)) sum += 1
+        j += 1
+      }
+      i += 1
+    }
+    sum
+  }
+
+  val obj1 = new Object
+  val obj2 = new Object
+
+  def run() {
+    var sum = 0
+    sum += eqeqtest(x => if (x == 0) obj1 else obj2, 2000)
+    sum += eqeqtest(x => x, 1000)
+    sum += eqeqtest(x => x.toChar, 550)
+    sum += eqeqtest(x => x.toByte, 550)
+    sum += eqeqtest(x => x.toLong, 550)
+    sum += eqeqtest(x => x.toShort, 100)
+    sum += eqeqtest(x => x.toFloat, 100)
+    sum += eqeqtest(x => x.toDouble, 100)
+    assert(sum == 2968750)
+  }
+}