On 12/14/07, Andrew Coppin
Well anyway, a few years ago we didn't have fusion,
This is not true. Shortcut deforestation (fusion) has been in GHC for at least fourteen years: http://citeseer.ist.psu.edu/gill93short.html It's true that we didn't have stream fusion a few years ago.
and we didn't have ByteString.
(true.) [snip]
All I know is that once again, it seems Haskell isn't as fast as I thought... *sigh*
No, what you know is that *one particular implementation* of Haskell isn't as fast as you thought. [snip]
A few years ago, the program would have taken 0.35 seconds. The end.
I would be careful about making this statement if I were you. Did you actually try running the same code in GHC 5.0? It's not as if GHC didn't implement *any* optimizations in 2003 (you said above that "0.35 seconds" was the result you got with -O0.) Cheers, Tim -- Tim Chevalier * catamorphism.org * Often in error, never in doubt "Now, don't bother to flame me, because by the time you read this post I will be a different person from the one who wrote it. You cannot step in the same river twice." -- Sarah Barton