Re: [Haskell-cafe] Re: Hugs vs GHC (again) was: Re: Somerandomnewbiequestions

Simon Marlow wrote:

There's a big lock on File. If you want to do truly concurrent reading, you can make multiple FileInputStreams, each of which has its own file descriptor (the Unix implementation uses dup(2)).

Original and descriptor returned by dup or dup2 share file pointer. -- Gracjan