[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

[STINNER Victor]

STINNER Victor added the comment:

(Oops, I attached the wrong patch, fixed in patch v2.)

Quick & dirty micro-benchmark:

Original:

$ ./python -m timeit -s 'lst=list("hello")' 'lst[2]'
10000000 loops, best of 3: 0.0261 usec per loop

Patched:

$ ./python -m timeit -s 'lst=list("hello")' 'lst[2]'
10000000 loops, best of 3: 0.0186 usec per loop

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Added file: http://bugs.python.org/file41834/binary_subscr-2.patch

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