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If the decision on whether this should swing Python or C++ is still open, here’s some food for thought: it’s trivially parallelizable. I lobbed some stuff in https://reviews.llvm.org/D26789 I used the pure python PyYAML and got a speedup of ~4x on my test case. I expect you might still be able to get an improvement with libYAML + a patch like this one. FWIW prior to this I also tried PyPy (w/original opt-viewer.py+pure python PyYAML) and got a very modest improvement. I haven’t tr...

...2016, at 9:43 PM, Cain, Brian <bcain at quicinc.com <mailto:bcain at quicinc.com> > wrote: If the decision on whether this should swing Python or C++ is still open, here’s some food for thought: it’s trivially parallelizable. I lobbed some stuff in <https://reviews.llvm.org/D26789> https://reviews.llvm.org/D26789 I used the pure python PyYAML and got a speedup of ~4x on my test case. I expect you might still be able to get an improvement with libYAML + a patch like this one. FWIW prior to this I also tried PyPy (w/original opt-viewer.py+pure python PyYAML) and go...

That's compared to the implementation with the Python parser. So if the libYAML parser is 6x the speed of that, the C++ version would be about 10x the speed of the implementation with libYAML, instead of 60x. On Tue, Nov 15, 2016 at 10:50 AM, Adam Nemet <anemet at apple.com> wrote: > > On Nov 15, 2016, at 10:33 AM, Bob Haarman <inglorion at google.com> wrote: > >