[Webkit-unassigned] [Bug 91172] [PerfTest] Add performance tests for image decoding

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=91172





--- Comment #1 from Huang Dongsung <luxtella at company100.net>  2012-07-25 23:21:05 PST ---
Some people felt the necessary in 2009.
http://trac.webkit.org/wiki/QtWebKit/CodeCamp200912

I quote
"Presentation on how to support JavaScript programmers to see what is going on. Currently a JavaScript API to expose information about painting is exposed. This API is similiar to the Mozilla mozAfterPaint Event. This way a JavaScript developer can see which content will be redrawn due his code. Another thing is to export the FPS count for drawing to the JavaScript developer. This somehow relates to the WebTime effort of the W3C. In the future we will need a heap profiler that will show the heap usage for each callframe of the JavaScript execution and finally we need the ability to do this on the device and get the data on the host."

However, I think there had not been any progress yet because I can not find the relevant code in the upstream WebKit.

WebKitAfterPaintEvent seems the solution to measure image decoding time.

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