chad.scherrer: > > they currently use two different fusion systems. bytestring uses an > > older version of what is now stream fusion. at some point we'll switch > > bytestrings over to using the new stuff in the stream-fusion package, > > since its a lot better. > > Oh, that's pretty interesting. I had assumed bytestring had the latest > fusion stuff. > > > ah, you assume stream-fusion lists are slower. for list stuff, since > > 6.8, i've only seen things the same speed or better. but if you have a > > program doing the wrong thing, it would be worth looking at. > > I was just going by the "Lists to Streams to Nothing At All" paper. > That's great that it's gotten faster! Does that mean the path for > replacing Data.List with this is any clearer?
Not yet. We still don't have a good system for fusing nested concatMaps, that GHC likes, which come up when you desugar list comprehensions. If you can live without too many comprehensions, then the stream-fusion package is entirely viable. -- Don _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
