[Haskell-cafe] fast Array operations: foldl, drop

[Roman Leshchinskiy]

Don Stewart wrote:
> 
> I forgot to mention this early, but possibly you could use the ndp array 
> library. There are some people using its UArr type for (non parallel)
> strict arrays, that support map/fold/zip et al.
> 
>     http://darcs.haskell.org/packages/ndp/
> 
> This blog post recently,
> 
>     http://sequence.complete.org/node/371
> 
> shows at least one non-developer is using it :)
> 
> Roman, what do you think -- are the unlifted, non-parallel arrays usably `beta'?

Yes, they definitely are. UArr uses stream fusion, BTW, so things should 
fuse sometimes.

On a more general note, we plan to put a generally usable UArr-like 
layer underneath the current standard array types eventually. This would 
provide all interesting operations as well as fusion. It might take a 
while (i.e., months) until I get around to doing it, though.

Roman