Re: [Haskell-cafe] Question about the Monad instance for Iteratee (from the enumerator package)

Joining slightly late...

From: John Millikin

John Lato's "iteratee" package is based on IterateeMCPS.hs[1]. I used IterateeM.hs for "enumerator", because when I benchmarked them the non-CPS version was something like 10% faster on most operations.

Based on tests I did before iteratee-0.4, the fastest implementation was Oleg's alternate design which is in the comments of IterateeM.hs. I don't think any current packages use that however, with good reason. I'd be interested to see the results of a shootout between iteratee and enumerator. I would expect them to be basically equivalent most of the time, with maybe two or three operations with a small (but consistent) difference one way or the other. John L.