[Webkit-unassigned] [Bug 22275] Return memory more aggressively when large amount of memory has been freed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=22275


slewis at apple.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|webkit-                     |slewis at apple.com
                   |unassigned at lists.webkit.org |
             Status|ASSIGNED                    |NEW




------- Comment #2 from slewis at apple.com  2008-11-19 23:14 PDT -------
simply adding a bool to track which spans are returned to the system is a .5%
sunspider regression

returning spans that are being merged to spans that have already been returned
is an additional 1% sunspider regression.  

Without these improvements we don't keep accurate count of how much memory we
have already returned to the system so any heuristic based on what memory we
think we have will be skewed.  

On sunspider ~40% of the pages merged are returned memory so the skew is
significant.

As a side note, tracking and merging returned pages is also part of the problem
with returning memory on windows.


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