#481: Recompilation check fails for TH -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonmar Type: bug | Status: closed Priority: normal | Milestone: 7.2.1 Component: Template Haskell | Version: 6.4.1 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: TH_recompile Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by saurabhnanda): * cc: saurabhnanda (added) Comment: Just wondering what would be the perf-impact of doing the extra "stability check" (as mentioned in https://ghc.haskell.org/trac/ghc/ticket/481#comment:11 )? A lot of the code that we write uses TH heavily (eg. deriving ToJSON/FromJSON instances, test-suites, deriving lenses, etc) and I was wondering if this particular issue is the reason for generally slow compile times. (Not that I have isolated this to be the reason -- just asking.) We have 1,200+ modules in our code-base and we use TH so heavily that it's enabled by default (via the Cabal file). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/481#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler