[Haskell-cafe] Wanted: Haskell binding for libbdd (buddy)

[Serguey Zefirov]

2012/8/20 Johannes Waldmann <waldmann at imn.htwk-leipzig.de>:
> Are there any Haskell bindings for BDD libraries
> (reduced ordered binary decision diagrams)?
>
> E.g., it seems "buddy" is commonly used
> http://packages.debian.org/squeeze/libbdd-dev
> and it has an Ocaml binding.
>
> Yes, there is http://hackage.haskell.org/package/obdd
> but I need better performance (with the same API, ideally).
>
> Thanks - J.W.
>
> PS: I wonder where performance goes out the window  ...
> I suspect  "Map (Int,Int) whatever" should really be
> a hashtable but I don't like it in IO, it should be in ST?

Actually, all Maps there should be IntMap's, strict ones. And yes,
cache field should be two-level IntMap too.

The type Index is good for external typed access, but internally one
should use IntMap.

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