|Summary:||[CSS Parser] Enable CSS Deferred Parsing|
|Product:||WebKit||Reporter:||Dave Hyatt <hyatt>|
|Component:||CSS||Assignee:||Dave Hyatt <hyatt>|
|Version:||WebKit Nightly Build|
Description Dave Hyatt 2016-12-14 14:21:35 PST
This bug is tracking turning on CSS deferred parsing by default. I'm going to post some performance numbers to make it clear what a win it is.
Comment 1 Dave Hyatt 2016-12-14 14:53:27 PST
Some #s. All are done on reloads of the page to ensure all stylesheets reparse. 10 loads done of each site with deferred parsing on and off and average taken. 40% reduction on apple.com 25% reduction on twitter.com (logged in with a feed) 25% reduction on facebook.com (logged in, my account) 30% reduction on cnn.com The gain is anywhere from 5-15ms for each page in the examples above. Parsing doesn't take all that long on most pages, but even so, this is a huge improvement.
Comment 3 Sam Weinig 2016-12-14 16:11:26 PST
Comment on attachment 297136 [details] Patch Nice nice!
Comment 4 WebKit Commit Bot 2016-12-15 07:46:49 PST
Comment on attachment 297136 [details] Patch Clearing flags on attachment: 297136 Committed r209862: <http://trac.webkit.org/changeset/209862>
Comment 5 WebKit Commit Bot 2016-12-15 07:46:53 PST
All reviewed patches have been landed. Closing bug.