Improving Data.Char.isSpace performance

[Joachim Breitner]

Hi,

have you considered investigating whether the ffi call can be sped up?
To me it seems to be a bit overheady to first check in Haskell-Land for
common cases and then call code that would (or does?) this check as
well.

Maybe the overhead for calling the C code can be reduced so that it is
no longer worth doing special casing in the Haskell code. Maybe using
primitive operations instead of the C calling convention help, as it
would effectively inline the call to u_iswspace?

Greetings,
Joachim

-- 
Joachim "nomeata" Breitner
  mail at joachim-breitner.de  |  nomeata at debian.org  |  GPG: 0x4743206C
  xmpp: nomeata at joachim-breitner.de | http://www.joachim-breitner.de/

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