[Haskell-cafe] Haskell performance when it comes to regex?

[Joachim Durchholz]

Am 30.05.2017 um 12:08 schrieb Chris Dornan:
> I would generally recommend TDFA, unless you need the highest performance
> (as in this case) or Perl-style REs.

Just for the record: Be aware the PCRE isn't the fastest regex engine 
out there. It's generally good, but (a) it's doing backtracking which 
can make it exponentially slow, and (b) since Perl regexes have so many 
features, the PCRE engine cannot apply all optimizations that a highly 
optimized RE engine could.

As always, if speed is an issue, assumptions and word of mouth need to 
be verified using benchmarks.