#11725: Performance Regression from 7.8.3 to 7.10.3 -------------------------------------+------------------------------------- Reporter: dominic | Owner: dominic Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Linux | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dominic): Here's my proposed approach to pinning it down. 1. Build ghc-8.0.1-rc2 and run my program under it. If the regression is gone then I propose to do no further investigation. 2. git bisect the sources from 7.8.3 to 7.10.3 until I find the change that causes the regression. Does that sound reasonable? Is there any guidance on how to do (2) efficiently and effectively? At the moment I cannot get my sources to compile under ghc-8.0.1-rc2 so my first mini-step is to solve this. I should point out that this is somewhat tangential to my day job although we use RNGs extremely heavily in our application. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11725#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler