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A comment on 3.7X speedup from removing a call to sleep. Parent comment

Re:3.7X speedup from removing a call to sleep by azakai on Sunday September 02, 2012 @01:32PM (#4467569)
The speedup sounds like it is very specific to GC, apparently the WebKit GC relies on this component heavily.

I would guess this is relevant only for GC in Safari, since it uses the WebKit JS engine, and not Chrome (which uses a completely different JS engine, V8).

It's also likely only a speedup in a specific GC benchmark. If it had helped in say the SunSpider benchmark, I'm pretty sure it would have been fixed a long long time ago.

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Re:3.7X speedup from removing a call to sleep by othermaciej on Sunday September 02, 2012 @04:49PM (#4468061)
This code is actually not that specific to GC - this particular spinlock is used by our custom malloc implementation. It's just that our GC creates a different concurrency pattern than most other workloads for the allocator.
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