[Webkit-unassigned] [Bug 186782] New: Investigate StringImpl memory use

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186782

            Bug ID: 186782
           Summary: Investigate StringImpl memory use
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Template Framework
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

The data in bug 186422 show that the StringImpl heap uses about 20MB of dirty memory, but only contains about 6MB of data, so there's a potential memory saving here of up to 14MB.

                                                        VIRTUAL   RESIDENT      DIRTY    SWAPPED ALLOCATION      BYTES DIRTY+SWAP          REGION
MALLOC ZONE                                                SIZE       SIZE       SIZE       SIZE      COUNT  ALLOCATED  FRAG SIZE  % FRAG   COUNT
===========                                             =======  =========  =========  =========  =========  =========  =========  ======  ======
WebKit StringImpl_0x10b4c0000                            100.0M      23.2M      19.9M         0K      74493      6166K      13.9M     70%      27

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