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

[John Lato]

On Tue, Apr 26, 2011 at 6:32 PM, John Millikin <jmillikin at gmail.com> wrote:

> On Tuesday, April 26, 2011 7:19:25 AM UTC-7, John Lato wrote:
>
>> 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.
>>
>
> I did some basic benchmarks a few months ago; if I remember correctly, it
> depends almost entirely on how well GHC optimizes CPS on a particular
> platform. The relative performace was very similar to Lennart Kolmodin's
> benchmarks of "binary" at <
> http://lennartkolmodin.blogspot.com/2011/02/binary-by-numbers.html >. In
> particular, CPS/"iteratee" is faster on 32-bit, while state
> passing/"enumerator" is faster on 64-bit.
>
> This difference exists for almost all operations, and was on the order of
> 5-15% depending on the shape of the input. I couldn't figure out a good way
> to benchmark the libraries themselves when there's so much noise from the
> compiler.
>

That figures.  Thanks for sharing this.

John L.
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