[issue26098] PEP 510: Specialize functions with guards

[STINNER Victor]

STINNER Victor added the comment:

Results of the "The Grand Unified Python Benchmark Suite" on  specialize-6.patch.

I'm skeptical, I don't understand how my patch can make a benchmark faster :-) The result of regex_v8 is bad :-/

$ python3 -u perf.py --rigorous ../default/python.orig ../default/python
(...)
Report on Linux smithers 4.3.3-300.fc23.x86_64 #1 SMP Tue Jan 5 23:31:01 UTC 2016 x86_64 x86_64
Total CPU cores: 8

### chameleon_v2 ###
Min: 5.558607 -> 5.831682: 1.05x slower
Avg: 5.613403 -> 5.902949: 1.05x slower
Significant (t=-27.95)
Stddev: 0.06994 -> 0.07640: 1.0924x larger

### django_v3 ###
Min: 0.582356 -> 0.573327: 1.02x faster
Avg: 0.604402 -> 0.582197: 1.04x faster
Significant (t=3.43)
Stddev: 0.05618 -> 0.03215: 1.7474x smaller

### regex_v8 ###
Min: 0.043784 -> 0.049854: 1.14x slower
Avg: 0.044270 -> 0.050521: 1.14x slower
Significant (t=-19.87)
Stddev: 0.00200 -> 0.00243: 1.2105x larger

The following not significant results are hidden, use -v to show them:
2to3, fastpickle, fastunpickle, json_dump_v2, json_load, nbody, tornado_http.

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