re.search much slower then grep on some regular expressions
Terry Reedy
tjreedy at udel.edu
Sun Jul 6 15:58:43 EDT 2008
Sebastian "lunar" Wiesner wrote:
> I completely agree. I'd just believe, that the combination of some finite
> state machine for "classic" expressions with some backtracking code is
> terribly hard to implement. But I'm not an expert in this, probably some
> libraries out there already do this. In this case, it'd be time to give
> pythons re engine a more sophisticated implementation ;)
One thing to remember in making comparisons is that Python moved to its
own implementation to support unicode as well as extended ascii (bytes
in 3.0). Does grep do that? Has pcre, which Python once used, been
upgraded to do that?
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