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Mon Dec 13 22:03:36 CET 2004 · https://mail.python.org/pipermail/python-dev/2004-December/050418.html

On Mon, 13 Dec 2004 12:57:07 PST, Bill Janssen <janssen at parc.com> wrote:
> Apparently the Python program, which applies the same re substitutions
> in the same order as the Perl program, takes 3 times as long to run.
> He thinks it's because of mutable strings in Perl -- that is, he
> thinks the string being modified (which is long, a whole file full of
> text) is modified in place in Perl, but has to be re-consed in Python.

Did he use re.compile?

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