[Haskell-cafe] Parsec3 performance issues (in relation to v2)

Neil Mitchell ndmitchell at gmail.com
Tue May 13 14:56:59 EDT 2008


>  Anyway, the log file that i'm parsing uses English grammar, and the
> performance really dropped just by upgrading to Parsec3. I was hoping to use
> the ByteString support to boost the speed of already slow code, but had no
> such luck. It basicly went from "Ugh, this is kinda slow" to "Uhhhh i'm
> gonna go grab a burger and let this melt my CPU" haha.

I think it is known that Parsec 3 is slower than Parsec 2, as a result
of the increased generality. I know that in the past someone was
working on it, but I am not sure if they ever got anywhere.



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