Comment #16 on issue 22948 by jamesr.gatech: web pages eating lots of CPU
http://code.google.com/p/chromium/issues/detail?id=22948

My initial suspicion is that a large number of timers are being set -  
either a large
number of concurrent setInterval()s building up over time or a bunch of  
setTimeout()s
somehow getting enqueued quickly.

I'm not sure how to verify this in a running prod browser, but it should be  
very easy
to check in a debug build by putting a breakpoint in  
ScheduledAction::execute().  The
callstack in #7 is what you would typically see for either a setTimeout() or
setInterval() call and the callstack in #8 is the postprocessing, most  
likely blocked in
the QueryPerformanceCounter().

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