#9246: GHC generates poor code for repeated uses of min/max --------------------------------------------+------------------------------ Reporter: arotenberg | Owner: Type: feature request | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 Type of failure: Runtime performance bug | (amd64) Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: #6135 --------------------------------------------+------------------------------ Comment (by arotenberg): On the contrary, replacing the NOINLINEs with INLINEs results in essentially the original Core, local lambdas and all. I explicitly put the NOINLINEs in because that was the only way I could find to force GHC to not expand the branches and add the unnecessary lambdas and lazy lets. Perhaps this issue should be split into two tickets - something like "Add branchless min/max primops" and "Min/max-like functions cause unnecessary closure creation"? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9246#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler