On 05/11/2009, at 04:01, Bulat Ziganshin wrote:
oh, can we stop saying about shootout? if you want to see speed of pure haskell code, look at papers about fast arrays/strings - their authors have measured that lazy lists are hundreds times slower than idiomatic C code. is use of lazy lists counted as mistake too and paper authors had too small haskell experience?
In the papers I coauthored, I don't think we measured any such thing. What we measured was that in algorithms that are best implemented with (unboxed) arrays, using boxed lists is going to cost you. That's not a very surprising conclusion and it's by no means specific to Haskell. The problem was/is the lack of nice purely declarative array libraries but that changing, albeit slowly. It's a question of using the right data structure for the algorithm, not a C vs. Haskell thing. Roman