Porges/stringprep-hs — pull request #1 by Philonous (2012-04-18 12:42:03+00:00)
Title: Removed dependence on OverloadedString

OverloadedStrings causes the compilation to be an order of magnitude slower. (47 instead of 6 seconds on my machine) and a quick criterion benchmark even reveals (map Text.pack) to execute faster (by about 10%).