Matthew Barnett <pyt...@mrabarnett.plus.com> added the comment:

There are occasions when you want to do string slicing, often of the form:

pos = my_str.index(x)
endpos = my_str.index(y)
substring = my_str[pos : endpos]

To me that suggests that if UTF-8 is used then it may be worth profiling to see 
whether caching the last 2 positions would be beneficial.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue12729>
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