#15426: `elemIndex` and `findIndex` still can't fuse -------------------------------------+------------------------------------- Reporter: kabuhr | Owner: kabuhr Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: libraries/base | Version: 8.4.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | testsuite/tests/perf/should_run/T15426.hs Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | https://phabricator.haskell.org/D5063 -------------------------------------+------------------------------------- Comment (by simonpj): OK fine. So if I understand aright: * Nofib gets no better but no worse * More fusion happens in other cases (eg the Description) Sounds good to me. It would be good to include a perf regression test that will trip if fusion fails in the future. And a Note to explain the INLINABLE pragma. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15426#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler