[Webkit-unassigned] [Bug 38368] New: When FastMalloc Returns memory often left with lots of small spans

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=38368

           Summary: When FastMalloc Returns memory often left with lots of
                    small spans
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: slewis at apple.com


When FastMalloc Returns memory we're often left with lots of 1 page spans and
none of the large sizes.  Change the scavenging algorithm to always keep some
large size spans around.  Also change it distribute the returns among the list
more equally. 
<rdar://problem/7834433> REGRESSSION: 1.5% PLT regression due to 56028 (return
memory quicker).

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