Comment #2 on issue 2387 by [email protected]: Parser/tiny-innerHTML is spending 17.5% of time in sem_post under v8?
http://code.google.com/p/v8/issues/detail?id=2387
I looked at the svg output. There are around 2064 samples in this svg output (out of the nearly 2100, so there's some slop in other non-core areas, but that's not worth examining). When we go from the WebCore callback into V8, we still have all 2064 samples, so that part's cheap. By the time we exit V8 into WebCore, we're at 1554 samples. Out of the 510 samples we spent in V8, there's a big chunk of that (360 samples) in sem_post. The rest of the 1554 samples is distributed through WebCore, and looks to primarily be in tokenizing.
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