compile time performance regression with OverloadedStrings and Text
There is a big performance regression in the compile time from ghc 7.10.1 to ghc 7.10.1.20150612
I believe it is in this file which has a huge literal value which also contains overloaded strings using Text:
time cabal build with ghc 7.10.1
real 1m20.449s
user 2m5.040s
sys 0m48.504s
time cabal build with ghc 7.10.1.20150612
real 9m3.447s
user 12m19.704s
sys 3m25.724s
I am running debian 64 bit unstable with the ghc binary tarballs from here: https://www.haskell.org/ghc/