https://codereview.chromium.org/99013003/diff/40001/src/runtime.cc
File src/runtime.cc (right):
https://codereview.chromium.org/99013003/diff/40001/src/runtime.cc#newcode8670
src/runtime.cc:8670: if (!unoptimized->contains(frame->pc())) {
I am not sure this is an improvement to no longer take the pc offset,
then do a stack walk just to check if it is the fast case. I think you
should instead pass the PC and then you can directly check if the
unoptimized code contains that PC, and only do a stack walk in the
(unlikely) failure case.
https://codereview.chromium.org/99013003/
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