[Haskell-cafe] Using loop fusion for writing efficent high-level code Re[2]: [Haskell] [Fwd: Re: Computer Language Shootout]

Bryan O'Sullivan bos at serpentine.com
Wed Feb 28 12:51:42 EST 2007

Bulat Ziganshin wrote:

> can you please provide examples of such code?

I'd recommend taking a look at the new binary package.  It's very 
cleanly written, and mostly easy to understand.  It's also easy to see 
where the optimisations have been made.  The only part that might induce 
sudden cranial expansion is the Builder monoid, which constructs a big 
delayed computation to efficiently fill out a lazy ByteString when the 
Put monad is run.

The optimisations haven't perverted the readability of the code much, 
but it's still quite fast.  I've clocked end-to-end serialisation and 
deserialisation over an Infiniband network at 234 MB/sec (~25% of line 
rate).  This consumed about 90% of one CPU on the sending side, while 
the receiving side was 100% pegged.


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