Greetings, I just ran validate with current HEAD (2b34947b60069e51abfcada9c45a6d7b590f5a2b) and I have quite a few perf failures. Perhaps these need tweaking? I know that 32-bit numbers were neglected in the past. The Haddock numbers have been complaining for a few weeks now but I think everything else is fairly new. Here is the end of the log: Unexpected results from: TEST="T876 T7954 T8766 T1969 T5631 T783 T3294 haddock.Cabal haddock.compiler haddock.base T3924" OVERALL SUMMARY for test run started at Thu Feb 20 00:54:28 2014 GMT 0:18:11 spent to go through 3903 total tests, which gave rise to 15265 test cases, of which 11699 were skipped 28 had missing libraries 3469 expected passes 58 expected failures 3 caused framework failures 0 unexpected passes 11 unexpected failures Unexpected failures: ../../libraries/base/tests T8766 [stat too good] (normal) callarity/perf T3924 [stat too good] (normal) perf/compiler T1969 [stat too good] (normal) perf/compiler T3294 [stat too good] (normal) perf/compiler T5631 [stat too good] (normal) perf/compiler T783 [stat too good] (normal) perf/haddock haddock.Cabal [stat too good] (normal) perf/haddock haddock.base [stat not good enough] (normal) perf/haddock haddock.compiler [stat too good] (normal) perf/should_run T7954 [stat too good] (normal) perf/should_run T876 [stat too good] (normal) -- Mateusz K.