[Haskell-cafe] Re: Network parsing and parsec

[Keean Schupke]

John Goerzen wrote:

>On Tue, Sep 20, 2005 at 02:29:12PM +0100, Keean Schupke wrote:
>  
>
>>>It's unclear to me exactly how to mix the IO monad with Parsec.  It
>>>doesn't really seem to be doable.
>>>
>>>Not to mention that if hGetContents is used, the Handle has to be put
>>>into non-buffering mode, which means one syscall per character read.
>>>Terribly slow.
>>>
>>>
>>>
>>>      
>>>
>>Does it? I didn't think so ...
>>    
>>
>
>strace seems to say yes.
>  
>
Thats odd, the source code  seems to suggest that when you read past the 
end of the buffer
it reads the next entire buffer (it has cases for each possible buffer 
configuration, line, block and none) - and I can think of no reason 
_why_ it cannot use buffering... I would think that it's a bug if it is 
the case.

    Regards,
    Keean.