#13739: Very slow linking of profiled executables -------------------------------------+------------------------------------- Reporter: duog | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1-rc2 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Compile-time | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by niteria): I wanted to compare `gold` to `collect2`, so I run linking of profiled `ghc-stage2` under both with and without `--gc-sections`. The results: {{{ no --gc-sections, collect2 real 0m9.456s user 0m8.248s sys 0m1.168s 161M ghc/stage2/build/tmp/ghc-stage2 no --gc-sections, gold real 0m3.122s user 0m2.680s sys 0m0.441s 161M ghc/stage2/build/tmp/ghc-stage2 --gc-sections, collect2 real 2m14.460s user 2m13.356s sys 0m1.087s 129M ghc/stage2/build/tmp/ghc-stage2 --gc-sections, gold real 0m3.118s user 0m2.691s sys 0m0.411s 129M ghc/stage2/build/tmp/ghc-stage2 }}} Looks like `gold` doesn't even break a sweat. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13739#comment:18 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler