runtime fusion for Data.ByteString.cons ?

Spencer Janssen sjanssen at
Sun Nov 19 18:49:40 EST 2006

On Nov 19, 2006, at 11:54 AM, Claus Reinke wrote:
> I noticed that ByteString is drastically slower than String if I use
> cons a lot. according to the source, that is expected because of
> the memcpy for the second parameter.

Have you considered constructing your strings with unfoldr?  It  
should be able to handle most (all?) of your string producing  
functions efficiently.

Spencer Janssen

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