[Haskell-cafe] [RFC] benchmarks of bytestrings, teaser
dons at galois.com
Sun Dec 16 17:46:18 EST 2007
> Don Stewart wrote:
> > cnt :: B.ByteString -> Int64
> > cnt bs = B.length (B.filter (== ' ') bs)
> > [...]
> >Now, this memory result is suspicious, I wonder if the now obsolete 'array
> >is messing things up. In Data.ByteString.Lazy, we have:
> Are you sure you have a fusible length? I think I only added it to NDP
> after stream fusion went in.
It was the array fusion from prior to the stream stuff (foldl . filter).
Which was in fact messing up the simplifier. I've fixed this, (turned
off array fusion for now), and things are back to normal. (well, much
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