Hi,

I am trying to get a better understanding of when the OSR optimization
is invoked. As per my understanding, CrankShaft is only invoked for
functions which have been seen at least 2, based on the parameter
kProfilerTicksBeforeOptimization = 2 in runtime-profiler.cc. But
because there might be functions that get invoked only once, because
they may be "long running", there is opportunity for optimizing the
long running function via on stack replacement.

My specific question is how does the runtime profiler determine if the
function in question is "long enough" to attempt OSR? I can see OSR is
not attempted if there are too many formal parameters, but not where
it is decided that it passes the checks?


Malek

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