#12032: Performance regression with large numbers of equation-style decls -------------------------------------+------------------------------------- Reporter: tommd | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: 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 tommd): Things have improves since 7.10.x but are still behind 6.12.x: {{{ vagrant@debian-jessie:~$ time ghc-6.12.3 -O2 -c -fforce-recomp regression- cpoly.hs real 0m0.069s user 0m0.056s sys 0m0.004s vagrant@debian-jessie:~$ time ghc-7.10.3 -O2 -c -fforce-recomp regression- cpoly.hs real 0m0.498s user 0m0.160s sys 0m0.064s vagrant@debian-jessie:~$ time ghc-8.0.0.20160204 -O2 -c -fforce-recomp regression-cpoly.hs real 0m0.225s user 0m0.196s sys 0m0.028s }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12032#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler