STINNER Victor added the comment:

Oh, I forgot this issue when I did the following commit:
--
changeset:   79902:b68be1025c42
user:        Victor Stinner <victor.stin...@gmail.com>
date:        Tue Oct 23 02:48:49 2012 +0200
files:       Objects/unicodeobject.c
description:
Optimize PyUnicode_RichCompare() for Py_EQ and Py_NE: always use memcmp()
--
I will benchmark the overhead of memcmp() on short strings. We may
check the first and last characters before calling memcmp() to limit
the overhead of calling a function.

I also read that GCC uses its builtin memcmp() which is slower than
the memcmp() of the GNU libc.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue16286>
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