1 files changed, 62 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/d8-performance-now.js b/deps/v8/test/mjsunit/d8-performance-now.js
new file mode 100644
index 0000000000..13eb1d3f00
--- /dev/null
+++ b/deps/v8/test/mjsunit/d8-performance-now.js
@@ -0,0 +1,62 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+// Test the performance.now() function of d8.  This test only makes sense with
+// d8.
+
+// Don't run this test in gc stress mode. Time differences may be long
+// due to garbage collections.
+%SetFlags("--gc-interval=-1");
+%SetFlags("--nostress-compaction");
+
+if (this.performance && performance.now) {
+  (function run() {
+    var start_test = performance.now();
+    // Let the retry run for maximum 100ms to reduce flakiness.
+    for (var start = performance.now();
+        start - start_test < 100;
+        start = performance.now()) {
+      var end = performance.now();
+      assertTrue(start >= start_test);
+      assertTrue(end >= start);
+      while (end - start == 0) {
+        var next = performance.now();
+        assertTrue(next >= end);
+        end = next;
+      }
+      if (end - start <= 1) {
+        // Found (sub-)millisecond granularity.
+        return;
+      } else {
+        print("Timer difference too big: " + (end - start) + "ms");
+      }
+    }
+    assertTrue(false);
+  })()
+}