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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