[Webkit-unassigned] [Bug 144010] New: Content extension with oft-repeated rules can cause slowdown

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=144010

            Bug ID: 144010
           Summary: Content extension with oft-repeated rules can cause
                    slowdown
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: beidson at apple.com

Content extension with oft-repeated rules can cause slowdown.

With a non-trivial extension adding multiple CSS rules per sub resource, we can't afford to create a new stylesheet each time, especially when they can often represent exactly the same rulesets.

We should have a single stylesheet per document and track which action-ids have added a display:none selector so we don't duplicate anything.

<rdar://problem/20618511>

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20150421/ab652c92/attachment.html>