[Haskell-cafe] lookup tables & style guidelines

[Ketil Malde]

Don Stewart <dons at galois.com> writes:

>>    1) what is the most performant lookup table/hashtable/dictionary solution
>>    for Haskell?

> Data.IntMap is awfully good.

Is it benchmarked anywhere?  Compared to the Judy bindings, or Adrian
Hey's AVL trees, or Data.Hashtable?  

I rewrote (roughly) a Python program in Haskell, and it was my
impression back then that Python's associative arrays was faster than
Haskell maps - but this could well have been back in the FiniteMap
days, and I don't think I benchmarked very precisely.

Anyway, there's a Google Summer-of-code project that will hopefully
produce some benchmarks of the different alternatives.

Data.Map tends to consume a lot of memory as well.

But - Data.(Int)Map is likely to be the easiest available - I'd try
that first, and if things are still too slow, profile, and then look
for alternatives.

-k
-- 
If I haven't seen further, it is by standing in the footprints of giants