Re: [Haskell-cafe] performance of map reduce

Bryan O'Sullivan ha scritto:

On Fri, Sep 19, 2008 at 2:31 PM, Manlio Perillo mailto:manlio_perillo@libero.it> wrote:

By the way, this phrase: "We allow multiple threads to read different chunks at once by supplying each one with a distinct file handle, all reading the same file" here: http://book.realworldhaskell.org/read/concurrent-and-multicore-programming.h...

IMHO is not correct, or at least misleading.

It's both correct and, er, leading. The files are opened in a single thread, and then the file handles are read by multiple threads.

Ah, right, thanks. They are read with ByteString.Lazy. Manlio Perillo