Raymond Hettinger added the comment:
Timings for no_special_hash.diff:
$ ~/cpython/python.exe -m timeit -r7 -s 's={"html"}' '"html" in s'
10000000 loops, best of 7: 0.0315 usec per loop
$ ~/nounicode/python.exe -m timeit -r7 -s 's={"html"}' '"html" in s'
10000000 loops, best of 7: 0.0336 usec per loop
$ ~/cpython/python.exe -m timeit -r7 -s 's={"html"}' '"html" in s'
10000000 loops, best of 7: 0.0316 usec per loop
$ ~/nounicode/python.exe -m timeit -r7 -s 's={"html"}' '"html" in s'
10000000 loops, best of 7: 0.0336 usec per loop
$ ~/cpython/python.exe -m timeit -r7 -s 's={1}' '1 in s'
10000000 loops, best of 7: 0.0331 usec per loop
$ ~/nounicode/python.exe -m timeit -r7 -s 's={1}' '1 in s'
10000000 loops, best of 7: 0.0328 usec per loop
$ ~/cpython/python.exe -m timeit -r7 -s 's={1}' '1 in s'
10000000 loops, best of 7: 0.0332 usec per loop
$ ~/nounicode/python.exe -m timeit -r7 -s 's={1}' '1 in s'
10000000 loops, best of 7: 0.0328 usec per loop
The unicode specialization in set_add, set_discard, and set_contains
benefits unicode lookups by 7% but impairs other lookups by 1%.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue23119>
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