[Webkit-unassigned] [Bug 284585] New: Deduplicate RenderStyle data structures

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=284585

            Bug ID: 284585
           Summary: Deduplicate RenderStyle data structures
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com
                CC: koivisto at iki.fi

We currently have a special-case deduplicate for custom properties, but we could deduplicate all the Style*Data classes between old and new RenderStyles, which would make RenderStyle::diff() cheaper since it would just test pointer equality more often.

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