> > If you are serious about arrow optimizations, it might be worthwhile to > modify the original preprocessor to output a richer GADT (with cases for > things like ArrSwap) with all the information it knows, so that user code > can experiment with optimizations. > > Godspeed on this interesting problem. Please publish :-) >
Thanks for the tips Luke. I didn't think of that. But would doing these optimizations at runtime be as efficient as using rewrite rules? I know Yampa uses these GADTs for optimization. No I won't be able to make such a big optimizer myself - but Paul Liu and Paul Hudak are working on something like that I think (see the Causal Commutative Arrows paper). But my code made use of a non-default *** and I found it odd that it was never called, so I hoped it would be easy to add a couple of simple rewrite rule so that *** was generated.
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