[Webkit-unassigned] [Bug 65382] New: The JSC garbage collector returns memory to the operating system too eagerly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=65382

           Summary: The JSC garbage collector returns memory to the
                    operating system too eagerly
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fpizlo at apple.com


The JSC garbage collector will, in full-sweep mode, return every free block to the operating system.  Subsequent memory requests will have a high probability of having to go back to the OS to re-request that same memory.  This is not efficient.  The GC should instead hold on to free memory for a little while, in case that memory will immediately be re-requested by the application code.  If it does not get requested by application code after a few seconds, it should be returned to the OS.

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