[issue28243] Performance regression in functools.partial()

[STINNER Victor]

STINNER Victor added the comment:

"If revert c1a698edfa1b, the performance is returned to the level of 3.5."

Oh, so using "fastcall" makes partial_call() slower? That's really something bad :-/ It would be nice if you can confirm using all optimizations enabled (PGO+LTO): ./configure --with-optimizations.

For faster compilation and best performances, you might also try to modify PROFILE_TASK in Makefile.pre.in to run your microbenchmark (but you need to run it long enough, so the compiler is able to detect hot code).

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<http://bugs.python.org/issue28243>
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