On 20 September 2012 16:47, Gregory Collins
We only call toLower explicitly in one place in snap-server, but where this would be nice to fix is for HTTP headers, where I think we are all using case-insensitive (which just calls "map toLower"). Probably we should send Bas a patch to optimize the FoldCase instance for ByteString.
Note that case-insensitive already uses an optimized toLower: instance FoldCase B.ByteString where foldCase = B.map toLower toLower :: Word8 -> Word8 toLower w | 65 <= w && w <= 90 || 192 <= w && w <= 214 || 216 <= w && w <= 222 = w + 32 | otherwise = w This was contributed by Kazu a month ago and modified by me to support all characters in the Latin1 supplement: https://github.com/basvandijk/case-insensitive/pull/6 Cheers, Bas