[Webkit-unassigned] [Bug 142950] New: ~13% of time spent in MarkRoots is unaccounted for in GC phase timings

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142950

            Bug ID: 142950
           Summary: ~13% of time spent in MarkRoots is unaccounted for in
                    GC phase timings
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mhahnenb at gmail.com

While messing around with graphing the time spent in each GC phase, I noticed that more than 13% of the time spent in the marking phase is currently unaccounted for (i.e. there is no active GCTimer for 13% of time spent in marking). There could be some GC pause time optimizations hiding in there, so we should figure out where that time is going.

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