I think I've fixed this. I've pushed the fix to wip/rae, and waiting for validation results before pushing to master.
My hunch below was right -- it was the change to matchFam, which essentially evaluated type-level functions more strictly. I've now made it lazier again. I'd like to better understand the tradeoff here, and to see if there's a principled sweet spot. But that will happen in a few days. Expect a push to master soon. Again, sorry for the bother. Richard On Dec 13, 2014, at 8:32 AM, Joachim Breitner <m...@joachim-breitner.de> wrote: > Hi, > > > Am Freitag, den 12.12.2014, 21:51 -0500 schrieb Richard Eisenberg: >> >> Phab has shown up some performance regressions in my recent commits. >> See https://phabricator.haskell.org/harbormaster/build/2607/. The >> failures except for haddock.base are new, and evidently my fault. They >> didn't show up on Travis. Will look into it shortly, but I doubt over >> the weekend. > > > ghcspeed also observes this: > http://ghcspeed-nomeata.rhcloud.com/changes/?rev=7256213843b80d75a86f033be77516a62d56044a&exe=2&env=johan%27s%20buildbot > > Especially the T9872 benchmarks have a huge increase in allocations. But > you seem to be aware of this, so that’s fine. > > Greetings, > Joachim > > -- > Joachim “nomeata” Breitner > m...@joachim-breitner.de • http://www.joachim-breitner.de/ > Jabber: nome...@joachim-breitner.de • GPG-Key: 0xF0FBF51F > Debian Developer: nome...@debian.org > > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://www.haskell.org/mailman/listinfo/ghc-devs _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://www.haskell.org/mailman/listinfo/ghc-devs
