[Webkit-unassigned] [Bug 180249] New: The GC load balancer should not rely on a global mutex

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180249

            Bug ID: 180249
           Summary: The GC load balancer should not rely on a global mutex
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

The Heap::m_markingMutex was a great first attempt at synchronizing a load balancer.  It's amazing how long that thing has survived.  But profiling shows that this is one of the most (and sometimes the absolute most) contended mutex in WebKit when running Speedometer.

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