Changeset 128649 in webkit

Timestamp:

Sep 14, 2012 1:51:13 PM (12 years ago)

Author:

rniwa@webkit.org

Message:

Use performance.webkitNow in PerfTestRunner
​https://bugs.webkit.org/show_bug.cgi?id=92826

Reviewed by Eric Seidel.

Use performance.webkitNow with Date.now as a fallback for more accurate time measurements.

• resources/runner.js:

(PerfTestRunner._runner):
(PerfTestRunner._perSecondRunnerIterator):

Location:

trunk/PerformanceTests

Files:

• ChangeLog (modified) (1 diff)
• resources/runner.js (modified) (4 diffs)

trunk/PerformanceTests/ChangeLog

@@ +1 @@
+2012-09-14  Ryosuke Niwa  <rniwa@webkit.org>
+
+        Use performance.webkitNow in PerfTestRunner
+        https://bugs.webkit.org/show_bug.cgi?id=92826
+
+        Reviewed by Eric Seidel.
+
+        Use performance.webkitNow with Date.now as a fallback for more accurate time measurements.
+
+        * resources/runner.js:
+        (PerfTestRunner._runner):
+        (PerfTestRunner._perSecondRunnerIterator):
+
 2012-09-14  Sheriff Bot  <webkit.review.bot@gmail.com>
 

trunk/PerformanceTests/resources/runner.js

@@ -28 +28 @@
 };
 
+PerfTestRunner.now = window.performance && window.performance.webkitNow ? function () { return window.performance.webkitNow(); } : Date.now;
+
 PerfTestRunner.log = function (text) {
     if (this._logLines) {
@@ -146 +148 @@
 
 PerfTestRunner._runner = function () {
-    var start = Date.now();
+    var start = this.now();
     var totalTime = 0;
 
@@ -159 +161 @@
 
     // Assume totalTime can never be zero when _runFunction returns a number.
-    var time = totalTime ? totalTime : Date.now() - start;
+    var time = totalTime ? totalTime : this.now() - start;
 
     this.ignoreWarmUpAndLog(time);
@@ -259 +261 @@
 
 PerfTestRunner._perSecondRunnerIterator = function (callsPerIteration) {
-    var startTime = Date.now();
+    var startTime = this.now();
     for (var i = 0; i < callsPerIteration; i++)
         this._test.run();
-    return Date.now() - startTime;
+    return this.now() - startTime;
 }