On Thu, Jan 14, 2010 at 11:38 PM, Bryan O'Sullivan <b...@serpentine.com> wrote: > On Thu, Jan 14, 2010 at 2:30 PM, Peter Simons <sim...@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%. > Hold on, he's using hGetBuf/hPutBuf.
Although I'd suggest wrapping that in bytestrings.. the point is, those functions are documented to ignore encoding and always use binary I/O. There shouldn't be a difference at all. I wonder if the difference goes away if the handle is explicitly set to binary? It shouldn't, but then again it shouldn't exist in the first place. -- Svein Ove Aas _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
