[Haskell-cafe] In-place modification

[Donald Bruce Stewart]

andrewcoppin:
> I was wittering on about stream fusion and how great it is, and I got a 
> message from Mr C++.
> 
> (Mr C++ develops commercial games, and is obsessed with performance. For 
> him, the only way to achieve the best performance is to have total 
> control over every minute detail of the implementation. He sees Haskell 
> is a stupid language that can never be fast. It seems he's not alone...)

Many libraries use inplace update and mutable data. Like, hmm, Data.ByteString.

-- Don