[GHC] #8763: forM_ [1..N] does not get fused (10 times slower than go function)
GHC
ghc-devs at haskell.org
Wed Apr 25 16:24:25 UTC 2018
#8763: forM_ [1..N] does not get fused (10 times slower than go function)
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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: |
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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>
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