#10397: Compiler performance regression 7.6 -> 7.8 in elimCommonBlocks -------------------------------------+------------------------------------- Reporter: TobyGoodwin | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.4 Resolution: | Keywords: Operating System: Unknown/Multiple | performance Type of failure: None/Unknown | Architecture: Blocked By: | Unknown/Multiple Related Tickets: | Test Case: see ticket | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by nomeata): Maybe the blocks could be grouped not by hash, but rather by block they might possible jump to. Then for each block B one only needs to compare the blocks that can jump to B. When identical blocks are found, the corresponding may-jump-to-sets can simply be unioned. OTOH, this seems relatively obvious, so there must be a reason why it is not done this way. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10397#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler