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From Gary Gregory <>
Subject Re: Anyone interested in regular expressions, again?
Date Sun, 01 Feb 2015 16:38:19 GMT
I think we'll need some clear performance advantages documented as well as
any compatibility issues.

This begs for a facade API IMO. I would not want to recode my app just to
test one vs. the other, it should be pluggable.


On Sat, Jan 31, 2015 at 10:58 AM, Benson Margulies <>

> So, once upon a time, there was a regex library here. It was retired,
> presumably on the grounds that it was rendered obsolete by the JRE's
> native support.
> However, the JRE's regular expressions have a pretty severe problem;
> they have unbounded (or at least, very, very, bad) execution time for
> some combinations of data and regex.
> To cope with this, we ported the Henry Spencer regular expression
> library (as found in TCL) from C to Java.
> Thus:
> Is anyone interested in this? Give or take the possible IP muddle of
> the original C Code, I could grant it easily.
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