Ketil Malde <[EMAIL PROTECTED]> writes:

>> data EvidenceCode = IAC | IUG | IFR | NAC | NR | ... deriving Show

> Could it be that this derived read instance is somehow very inefficient?

To answer my own question: this is exactly it, ghc derives less than
optimal code in this case.  Rather than reiterate the case here, I did
a quick writeup at http://blog.malde.org/, and would be quite happy
about any feedback or suggestions.

-k
-- 
If I haven't seen further, it is by standing in the footprints of giants
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