#15418: Performance drop 60 times on non-profiling binary -------------------------------------+------------------------------------- Reporter: hth313 | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by osa1):
How can performance drop 60x when I basically just relink it?
If you previously linked with profiling libraries and runtime, relinking it with non-profiling libraries and runtime (or the other way around) can of course make a huge difference. In one case all library functions are profiled and you're using profiling RTS, in the other they're not profiled and the RTS has less overheads. I'm confused about what exactly you're doing. I understand that you have one program that you want to optimize, and you're trying different profiling settings. You have these three configurations: - Compiled without profiling and run - Compiled with profiling and run without profiling (i.e. no `+RTS -p`) - Compiled with profiling and run with profiling (`+RTS -p`) Can you report numbes for each of these? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15418#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler