#12964: Runtime regression to RTS change -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: new Priority: highest | Milestone: 8.2.1 Component: Runtime System | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonmar): The fact that some of these tests seem to wobble around in response to unrelated changes suggests that it's something like an alignment or locality issue. These can be a pain to track down, especially when the difference is only 5%. The best plan of attack is to use perf to identify where the extra cycles are going (hopefully the extra 5% is localised in one place) and then go from there. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12964#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler