[Webkit-unassigned] [Bug 115804] New: Avoid unnecessary data copies when loading subresources with DoNotBufferData option

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=115804

           Summary: Avoid unnecessary data copies when loading
                    subresources with DoNotBufferData option
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: cgarcia at igalia.com


When DoNotBufferData option is used to load a resource, its data is always copied before sending it to the CachedResource. Most of the cached resources ignore the incremental data and wait until all data has been received to save the ResourceBuffer, that will be NULL anyway when DoNotBufferData is used. CachedRawResource notifies its clients about the incremental data, but it doesn't save the data when DoNotBufferData option is present. In those cases we are unnecessary copying the data.

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