GHC 6.12 dependency checking many times slower than 6.10
Get feldspar-language-0.1 from hackage and build it:
http://hackage.haskell.org/package/feldspar-language
http://hackage.haskell.org/packages/archive/feldspar-language/0.1/feldspar-language-0.1.tar.gz
Performance:
"cabal configure; cabal cuild; time cabal build"
6.12:
real 0m24.316s
user 0m24.063s
sys 0m0.159s
6.10:
real 0m2.252s
user 0m2.021s
sys 0m0.231s
"time cabal build" with 6.10 after "cabal build"-ing it with 6.12 (ie no "rm -rf dist" before building with 6.10)
real 0m24.304s
user 0m24.094s
sys 0m0.139s
The last one is especially strange.