Khudyakov Alexey schrieb:
On Saturday 23 May 2009 20:00:25 Henning Thielemann wrote:
I think the list should be avoided at all costs, because it is so slow. I don't know if it is fused away by clever optimizer rules in the binary package. Anyway, you can treat a Builder like a list. Just replace (++) by 'mappend' and [] by 'mempty'.
It should work like this:
do a <- getWord8 b <- getWord8 return $ Builder.singleton a `mappend` Builder.singleton b
It worked for me pretty well. Profiling shown that in my program {get,put}Stream functions takes less than 1% of execution time. I don't know which tricks ghc used.
I think code with list is more clear. Another problem that you can't use existing Binary instances with Builder.
You can since there is http://hackage.haskell.org/packages/archive/binary/0.5.0.1/doc/html/Data-Bin...