[Python-3000] find -> index patch (original) (raw)

Jack Diederich jackdied at jackdied.com
Sun Aug 27 06:12:27 CEST 2006

On Sat, Aug 26, 2006 at 07:51:03PM -0700, Guido van Rossum wrote:

On 8/26/06, Jack Diederich <jackdied at jackdied.com> wrote: > After some benchmarking find() can't go away without really hurting readline() > performance.

Can you elaborate? readline() is typically implemented in C so I'm not sure I follow.

A number of modules in Lib have readline() methods that currently use find(). StringIO, httplib, tarfile, and others

sprat:~/src/python-head/Lib# grep 'def readline' *.py | wc -l 30

Mainly I wanted to point out that find() solves a class of problems that can't be solved equally well with partition() (bad for large strings that want to preserve the seperator) or index() (bad for large numbers of small strings and for frequent misses). I wanted to reach the conclusion that find() could be yanked out but as Fredrik opined it is still useful for a subset of problems.

-Jack

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