[Webkit-unassigned] [Bug 141845] New: Very slow layout when rendering nested flexbox divs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=141845

            Bug ID: 141845
           Summary: Very slow layout when rendering nested flexbox divs
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: iOS 8.1
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: natewienert at gmail.com

Created attachment 246985
  --> https://bugs.webkit.org/attachment.cgi?id=246985&action=review
Test html for slow performance

I ran into this on both Desktop Safari 8.0 and mobile Safari on iOS 8.

In Chrome and Firefox the rendering is "normal" (<100ms), whereas in Safari the entire browser will lock for about 10 seconds on the attached HTML just to render.

If you add:

.comment, .comment div {
  display: 'block"
}

It immediately becomes fast again.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20150220/8734422b/attachment-0002.html>