[Webkit-unassigned] [Bug 102306] New: For single element arrays use the pointer into the CFDataRef instead of copying data

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Nov 14 17:40:00 PST 2012


https://bugs.webkit.org/show_bug.cgi?id=102306

           Summary: For single element arrays use the pointer into the
                    CFDataRef instead of copying data
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: psolanki at apple.com
                CC: ddkilzer at webkit.org


This is an optimization when USE(NETWORK_CFDATA_ARRAY_CALLBACK) is available. Generally, WebCore copies the data returned from CFNetwork into its own buffers once the resource is done loading. However, if the resource is cached, CFNetwork will return us a CFArrayRef with exactly 1 CFDataRef in it. In such a case, it might be beneficial to not copy the data and just use the byte pointer i.e. call CFDataGetBytePtr() and use that memory directly.

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