#10397: Compiler performance regression 7.6 -> 7.8 in elimCommonBlocks -------------------------------------+------------------------------------- Reporter: TobyGoodwin | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: 7.10.2 Component: Compiler | Version: 7.8.4 Resolution: fixed | Keywords: performance Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: see ticket Blocked By: | Blocking: Related Tickets: #14226 | Differential Rev(s): Phab:D892 Wiki Page: | Phab:D896 -------------------------------------+------------------------------------- Comment (by bgamari): I should correct my statement from comment:39 as I misunderstood the intent of the patch from comment:28: The commit does not change the behavior of CBE; rather, it only adjusts the hash function used for "rough" comparison to more closely reflect the equality relation used later. However, I would argue that our CBE is still significantly less aggressive than it should be. Let's continue this discussion on #14226. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10397#comment:41 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler