[Haskell-cafe] I/O performance drop in ghc 6.12.1

Bryan O'Sullivan bos at serpentine.com
Thu Jan 14 17:38:21 EST 2010

On Thu, Jan 14, 2010 at 2:30 PM, Peter Simons <simons at cryp.to> wrote:

> I just updated to GHC 6.12.1, and I noticed a significant drop in I/O
> performance that I can't explain.

This is probably brought about by the new Unicode I/O support in 6.12. Your
file isn't open in binary mode, so it's probably getting translated from
something like UTF-8 before it reaches you. Might want to compare the two.

I'm a little surprised by the magnitude of the difference; I might have
expected it to be 33%, not 400%.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.haskell.org/pipermail/haskell-cafe/attachments/20100114/0daf0f78/attachment.html

More information about the Haskell-Cafe mailing list