#9234: Compiled code performance regression ------------------------------------+--------------------------------- Reporter: augustss | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Windows Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+--------------------------------- Upgrading from ghc 7.2 to 7.8 has slowed down our main application noticeably. This is with 32-bit Windows. Here's some 7.2 numbers: {{{ INIT time 0.00s ( 0.00s elapsed) MUT time 287.78s (290.41s elapsed) GC time 87.39s ( 88.43s elapsed) EXIT time 0.00s ( 0.00s elapsed) Total time 375.63s (378.86s elapsed) }}} And corresponding 7.8 numbers: {{{ INIT time 0.00s ( 0.00s elapsed) MUT time 298.34s (301.35s elapsed) GC time 88.16s ( 89.27s elapsed) EXIT time 0.00s ( 0.00s elapsed) Total time 386.93s (390.62s elapsed) }}} This is not unexpected since every ghc upgrade so far has slowed down out code; it's just following the trend we expect. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9234 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler