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[perf-test] Add a micro benchmark for div.firstChild getter for an undefined firstChild
authorharaken@chromium.org <haraken@chromium.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Thu, 17 May 2012 22:04:49 +0000 (22:04 +0000)
committerharaken@chromium.org <haraken@chromium.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Thu, 17 May 2012 22:04:49 +0000 (22:04 +0000)
https://bugs.webkit.org/show_bug.cgi?id=86725

Reviewed by Ryosuke Niwa.

We are going to remove Bindings/dom-attributes.html and instead add more
reasonable micro benchmarks by classifying DOM binding call paths.

In this bug, we add a micro benchmark for div.firstChild getter for an
undefined firstChild. This benchmark covers other undefined DOM attributes
that return a null.

(Note: In V8, div.firstChild for an undefined firstChild is currently slower
than div.firstChild for a defined firstChild.)

Test results in my Linux desktop:

RESULT Bindings: undefined-first-child= 541.408311042 runs/s
median= 541.205412054 runs/s, stdev= 1.29841219187 runs/s, min= 537.897310513 runs/s, max= 543.209876543 runs/s

RESULT Bindings: undefined-first-child= 541.00750695 runs/s
median= 540.540540541 runs/s, stdev= 0.967521230965 runs/s, min= 539.215686275 runs/s, max= 543.209876543 runs/s

RESULT Bindings: undefined-first-child= 523.630714897 runs/s
median= 523.560209424 runs/s, stdev= 1.01570919645 runs/s, min= 522.193211488 runs/s, max= 525.624178712 runs/s

RESULT Bindings: undefined-first-child= 553.077663588 runs/s
median= 553.459119497 runs/s, stdev= 0.805697397863 runs/s, min= 551.378446115 runs/s, max= 554.156171285 runs/s

RESULT Bindings: undefined-first-child= 541.5401432 runs/s
median= 541.538666618 runs/s, stdev= 0.954301364767 runs/s, min= 539.877300613 runs/s, max= 543.209876543 runs/s

* Bindings/undefined-first-child.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@117503 268f45cc-cd09-0410-ab3c-d52691b4dbfc

PerformanceTests/Bindings/undefined-first-child.html [new file with mode: 0644] patch | blob
PerformanceTests/ChangeLog patch | blob | history

diff --git a/PerformanceTests/Bindings/undefined-first-child.html b/PerformanceTests/Bindings/undefined-first-child.html
new file mode 100644 (file)
index 0000000..53714ad
--- /dev/null
+++ b/PerformanceTests/Bindings/undefined-first-child.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+<body>
+<script src="../resources/runner.js"></script>
+<script>
+var div = document.createElement("div");
+
+PerfTestRunner.runPerSecond({
+    description: "This benchmark covers undefined DOM attributes that return a null.",
+    run: function() {
+        var localDiv = div;
+        for (var i = 0; i < 100000; i++)
+            localDiv.firstChild;
+}});
+</script>
+</body>
+</html>
diff --git a/PerformanceTests/ChangeLog b/PerformanceTests/ChangeLog
index 0ff8156..ddc283b 100644 (file)
--- a/PerformanceTests/ChangeLog
+++ b/PerformanceTests/ChangeLog
@@ -1,5 +1,41 @@
 2012-05-17  Kentaro Hara  <haraken@chromium.org>
 
+        [perf-test] Add a micro benchmark for div.firstChild getter for an undefined firstChild
+        https://bugs.webkit.org/show_bug.cgi?id=86725
+
+        Reviewed by Ryosuke Niwa.
+
+        We are going to remove Bindings/dom-attributes.html and instead add more
+        reasonable micro benchmarks by classifying DOM binding call paths.
+
+        In this bug, we add a micro benchmark for div.firstChild getter for an
+        undefined firstChild. This benchmark covers other undefined DOM attributes
+        that return a null.
+
+        (Note: In V8, div.firstChild for an undefined firstChild is currently slower
+        than div.firstChild for a defined firstChild.)
+
+        Test results in my Linux desktop:
+
+        RESULT Bindings: undefined-first-child= 541.408311042 runs/s
+        median= 541.205412054 runs/s, stdev= 1.29841219187 runs/s, min= 537.897310513 runs/s, max= 543.209876543 runs/s
+
+        RESULT Bindings: undefined-first-child= 541.00750695 runs/s
+        median= 540.540540541 runs/s, stdev= 0.967521230965 runs/s, min= 539.215686275 runs/s, max= 543.209876543 runs/s
+
+        RESULT Bindings: undefined-first-child= 523.630714897 runs/s
+        median= 523.560209424 runs/s, stdev= 1.01570919645 runs/s, min= 522.193211488 runs/s, max= 525.624178712 runs/s
+
+        RESULT Bindings: undefined-first-child= 553.077663588 runs/s
+        median= 553.459119497 runs/s, stdev= 0.805697397863 runs/s, min= 551.378446115 runs/s, max= 554.156171285 runs/s
+
+        RESULT Bindings: undefined-first-child= 541.5401432 runs/s
+        median= 541.538666618 runs/s, stdev= 0.954301364767 runs/s, min= 539.877300613 runs/s, max= 543.209876543 runs/s
+
+        * Bindings/undefined-first-child.html: Added.
+
+2012-05-17  Kentaro Hara  <haraken@chromium.org>
+
         [Performance test] Add a micro benchmark for div.firstChild getter
         https://bugs.webkit.org/show_bug.cgi?id=86582
 
Domain: Web Framework / Uncategorized;