[Webkit-unassigned] [Bug 133876] REGRESSION(r169703): Memory usage (JSHeap) on all performance tests got ~50% worse

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=133876





--- Comment #5 from Andreas Kling <akling at apple.com>  2014-06-18 10:55:53 PST ---
(In reply to comment #4)
> It looks like the absolute size of the regression is 60kB - 100kB. Is that right? If so, I think those high percentages just indicate that the test doesn't use much JS memory -- not that something major has changed.
> 
> In a test that does use a lot of JS memory, I would expect the memory impact of <http://trac.webkit.org/changeset/169703> to be much lower, percentage-wise, since one prototype is typically used by many client objects, making prototype memory a small fraction of heap memory.
> 
> I think we can accept this delta.

Indeed. There is clearly a space/time tradeoff here, and I think 100kB is well within the acceptable range.

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