[webkit-reviews] review requested: [Bug 42468] Fusing the bitmap get and set operations during GC marking improves performance : [Attachment 61824] Patch

[bugzilla-daemon at webkit.org]

Nathan Lawrence <nlawrence at apple.com> has asked  for review:
Bug 42468: Fusing the bitmap get and set operations during GC marking improves
performance
https://bugs.webkit.org/show_bug.cgi?id=42468

Attachment 61824: Patch
https://bugs.webkit.org/attachment.cgi?id=61824&action=review

------- Additional Comments from Nathan Lawrence <nlawrence at apple.com>
At collection time, we frequently want to mark a cell, while checking whether
it was originally checked.  Previously, this was a get operation follwed by a
set operation.	Fusing the two saves computation and gives a 0.5% sunspider
speedup.