Title: [130341] trunk/PerformanceTests
- Revision
- 130341
- Author
- jchaffr...@webkit.org
- Date
- 2012-10-03 16:28:46 -0700 (Wed, 03 Oct 2012)
Log Message
Add a performance test for subtree detaching
https://bugs.webkit.org/show_bug.cgi?id=98281
Reviewed by Eric Seidel.
The new test tries to stress detaching on a heavy subtree (2 levels deep but with 1,000 nodes per level).
We set display: none on the root and measure the time it takes to update the tree. Note that we will also
measure the time taken by recalcStyle and relayout but I don't think we can avoid that.
* Layout/subtree-detaching.html: Added.
Modified Paths
Added Paths
Diff
Modified: trunk/PerformanceTests/ChangeLog (130340 => 130341)
--- trunk/PerformanceTests/ChangeLog 2012-10-03 23:27:53 UTC (rev 130340)
+++ trunk/PerformanceTests/ChangeLog 2012-10-03 23:28:46 UTC (rev 130341)
@@ -1,3 +1,16 @@
+2012-10-03 Julien Chaffraix <jchaffr...@webkit.org>
+
+ Add a performance test for subtree detaching
+ https://bugs.webkit.org/show_bug.cgi?id=98281
+
+ Reviewed by Eric Seidel.
+
+ The new test tries to stress detaching on a heavy subtree (2 levels deep but with 1,000 nodes per level).
+ We set display: none on the root and measure the time it takes to update the tree. Note that we will also
+ measure the time taken by recalcStyle and relayout but I don't think we can avoid that.
+
+ * Layout/subtree-detaching.html: Added.
+
2012-10-02 Ryosuke Niwa <rn...@webkit.org>
Build fix after r130135. Dromaeo tests only report single memory value,
Added: trunk/PerformanceTests/Layout/subtree-detaching.html (0 => 130341)
--- trunk/PerformanceTests/Layout/subtree-detaching.html (rev 0)
+++ trunk/PerformanceTests/Layout/subtree-detaching.html 2012-10-03 23:28:46 UTC (rev 130341)
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html>
+<body>
+<script src=""
+<script>
+function buildTree()
+{
+ wrapper = document.createElement("div");
+ for (i = 0; i < 1000; ++i) {
+ var child = document.createElement("div");
+ for (j = 0; j < 1000; ++j) {
+ var grandChild = document.createElement("div");
+ child.appendChild(grandChild);
+ }
+ wrapper.appendChild(child);
+ }
+ document.body.appendChild(wrapper);
+}
+
+function setup() {
+ wrapper.style.display = "block";
+ // Force a layout so that everything is up-to-date.
+ wrapper.offsetTop;
+}
+
+function runTest() {
+ setup();
+
+ var now = PerfTestRunner.now();
+
+ wrapper.style.display = "none";
+ wrapper.offsetTop;
+
+ return PerfTestRunner.now() - now;
+}
+
+buildTree();
+
+PerfTestRunner.measureTime({run: runTest, runCount: 20, description: "This benchmark checks the time spend in detaching an tree." });
+</script>
+</body>
+</html>
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