[Webkit-unassigned] [Bug 87131] New: Web Inspector: HeapSnapshot: speedUp buildAggregates

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87131

           Summary: Web Inspector: HeapSnapshot: speedUp buildAggregates
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: loislo at chromium.org
                CC: timothy at apple.com, rik at webkit.org, keishi at webkit.org,
                    pmuellr at yahoo.com, joepeck at webkit.org,
                    pfeldman at chromium.org, yurys at chromium.org,
                    bweinstein at apple.com, apavlov at chromium.org,
                    loislo at chromium.org, alexeif at chromium.org


engine specific optimization changes. V8 can't inline getters and optimize for(i in object) loops.
I can do this because JSC doesn't have support for HeapProfiler.

RESULT heap-snapshot: _buildAggregates= 1509 ms
RESULT heap-snapshot: _calculateClassesRetainedSize= 1886 ms

vs

RESULT heap-snapshot: _buildAggregates= 665 ms
RESULT heap-snapshot: _calculateClassesRetainedSize= 1293 ms

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