[Haskell-cafe] vector operations

Duncan Coutts duncan.coutts at googlemail.com
Tue May 29 21:54:02 CEST 2012

On 29 May 2012 11:49, Evan Laforge <qdunkan at gmail.com> wrote:
> Good question.. I copied both to a file and tried ghc-core, but it
> inlines big chunks of Data.Vector and I can't read it very well, but
> it looks like the answer is no, it still builds the the list of sums.
> I guess the next step is to benchmark and see how busy the gc is on
> each version.
> But my impression was that stream fusion can't handle early aborts,
> which was why I was wondering why Vector lacks a foldAbort type
> function.

Note that foldr allows early abort so that's fine. Also, there's no
fundamental restriction due to stream fusion. Stream fusion can be
used for lazy lists afterall and can implement Data.List.foldr just


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