RESOLVED FIXED 105362
CSS Regions slow 
https://bugs.webkit.org/show_bug.cgi?id=105362
Summary CSS Regions slow
Johannes Wilm
Reported 2012-12-18 16:22:46 PST
When many regions are used on the same same page, they are slowing the page down considerably. Check http://sourcefabric.github.com/BookJS/test.html for a simple demo. Check http://sourcefabric.github.com/BookJS/test2.html for a demo of lots of flows. Check http://sourcefabric.github.com/BookJS/test3.html for a demo of long flows.
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Mihai Balan
Comment 1 2013-05-17 05:12:44 PDT
Could you please retest this with a newer Chromium? There's been some performance patches that landed in WebKit/Blink in this area.
Johannes Wilm
Comment 2 2013-05-23 15:24:20 PDT
This seems to have been resolved with recent improvements
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