#14683: Hole-y partial type signatures lead to slow compile times -------------------------------------+------------------------------------- Reporter: harpocrates | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by harpocrates): I've distilled the repo down to a single file. In the process, I've realized that the problem is actually not related to `PartialTypeSignatures`! On my machine: {{{ $ time ghc-7.10.3 Grammar.hs 17.71s user 1.30s system 97% cpu 19.543 total $ time ghc-8.0.2 Grammar.hs 139.23s user 1.77s system 99% cpu 2:22.31 total $ time ghc-8.2.2 Grammar.hs 127.42s user 1.53s system 98% cpu 2:11.08 total $ time ghc-head Grammar.hs 130.42s user 1.06s system 99% cpu 2:12.58 total }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14683#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler