#8763: forM_ [1..N] does not get fused (10 times slower than go function) -------------------------------------+------------------------------------- Reporter: nh2 | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #7206 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by osa1): * status: new => infoneeded Comment: Sorry for the confusion -- it turns out GHC 8.2.2 already optimizes this. Perhaps this can be closed or we may need a new reproducer. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8763#comment:36 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler