+1; it's obviously the packing that causes sloth.
Memoize the "pack "\t"" etc. stuff , and write bytestring replacements
for show for your data.
I guess you can use the Put monad instead of B.concat for that, by the way.
2009/2/9 Bulat Ziganshin
Hello Ketil,
Monday, February 9, 2009, 2:49:05 PM, you wrote:
in B.concat [f1,pack "\t",pack (show f2),...]
inelegance were it only fast - but this ends up taking the better part of the execution time.
i'm not a BS expert but it seems that you produce Strings using show and then convert them to BS. of course this is inefficient - you need to replace show with BS analog
-- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com
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