There is nothing that tests these functions in isolation although it's
#14037: Fix fusion for GHC's utility functions -------------------------------------+------------------------------------- Reporter: goldfire | Owner: rockbmb Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rockbmb): Replying to [comment:5 bgamari]: possible improvements would be reflected in the compiler allocations measured by the Nofib suite. I've been reading [https://ghc.haskell.org/trac/ghc/wiki/Building/RunningNoFib this] resource on NoFib, very useful. I'll keep what you said in mind. Since the OP also mentions `testsuite/tests/perf/compiler/T5631`, I'm also reading https://ghc.haskell.org/trac/ghc/wiki/Building/RunningTests so I can test the specific case described. I've already added some pragma code to `zipWith3, zipWith3M, zipwith4, zipwith4M`. In the coming days I'll run benchmarks. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14037#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler