[Webkit-unassigned] [Bug 90869] New: Add ImageDecodeWorker

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=90869

           Summary: Add ImageDecodeWorker
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: skyul at company100.net


ImageDecodeWorker is a thread pool implementation based on WorkQueue. ImageDecodeWorker internally manages a pool of WorkQueues (n = number of cores) and assigns one from the pool when an ImageDecodeWorker instance is created. So two ImageDecodeWorkers can share one WorkQueue.

Parallel image decoders create an instance of ImageDecodeWorker for each image. So the number of ImageDecodeWorker instances can be arbitrarily large, but the number of WorkQueues is limited to the number of cores. This effectively utilizes the underlying cores.

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