[Webkit-unassigned] [Bug 63909] New: Remove virtual functions from StyleImage.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=63909

           Summary: Remove virtual functions from StyleImage.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Enhancement
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: Czene.Tamas at stud.u-szeged.hu
                CC: loki at webkit.org


We can remove the virtual "isChachedImage, isPendingImage, isGeneratedImage" functions to speed up the StyleImage part of WebKit.
Some profile data shows this part is significant, especially in small CSS-based sites.
Removing the virtual functions - removing the calls - makes a small performance progression on this part.

We measured around 1% speed up on several sites like: bing.com , youtube.com

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