#8763: forM_ [1..N] does not get fused (10 times slower than go function) -------------------------------------+------------------------------------- Reporter: nh2 | Owner: (none) Type: bug | Status: new 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: | -------------------------------------+------------------------------------- Comment (by sgraf): I rebased `wip/llf` onto a recent HEAD commit. You can find my progress here: https://github.com/sgraf812/ghc/tree/llf. Currently, it doesn't pass the testsuite (even in default mode, which doesn't do any new lambda lifting), probably because I introduced some errors during the merge. I think we should continue the discussion in #9476. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8763#comment:64 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler