[Webkit-unassigned] [Bug 51460] New: Cache parsed CSS values

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=51460

           Summary: Cache parsed CSS values
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: serya at chromium.org


Each time a new values is set to a property of CSSMutableStyleDeclaration it's string is parsed to an array of CSSProperty objects. Same values are frequently assigned to sets of objects. Caching parsed values eliminates repeating this work.

This change gives ~13% boost in Dromaeo DOM Style (Prototype) (before - http://dromaeo.com/?id=126287,126288,126289 after - http://dromaeo.com/?id=126292,126293,126294).

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