[Webkit-unassigned] [Bug 119230] [CSS Regions] Selection performance

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=119230


Manuel Rego Casasnovas <rego at igalia.com> changed:

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--- Comment #4 from Manuel Rego Casasnovas <rego at igalia.com>  2013-10-26 04:25:39 PST ---
Created an attachment (id=215245)
 --> (https://bugs.webkit.org/attachment.cgi?id=215245&action=review)
Example of performance tests for selection in a document with and without CSS Regions

Now that the changes done in bug #105641 (r139197) are removed in trunk by bug #119622 (r155058) we can see the performance issues in the selection with CSS regions.

The new patch is an example of 2 tests that use bigger HTML files as example (a page with 50 regular divs and 50 regions).

The tests perform several selections from keywords in each <div> and the results shows the performance issues:
* Interactive/SelectNoRegions.html: ~60 ms
* Interactive/SelectRegions.html: ~140 ms

So this should be valid to start taking a look to the different issues and try to provide improvements.

Anyway I've found some performance tests related to regions under "PerformanceTests/Layout/" folder, so I'd reuse some stuff there to prepare new selection tests.

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