[Haskell-cafe] Curious why "cabal upgrade parsec" not installing latest version

[Ben Millwood]

On Thu, Sep 16, 2010 at 4:00 AM, Ivan Lazar Miljenovic
<ivan.miljenovic at gmail.com> wrote:
> Because Parsec-3 apparently still has some speed regressions compared
> to Parsec-2 (I'm not qualified to note whether its design is slow or
> if you have to use it differently to get good performance out of it),
> so many developers prefer to stick to Parsec-2 for this reason.

I thought Parsec 3.1 had pretty much caught up with the performance of parsec 2?