#11054: GHC on Windows could not use more than 64 logical processors -------------------------------------+------------------------------------- Reporter: varosi | Owner: Type: feature request | Status: new Priority: normal | Milestone: 8.2.1 Component: Runtime System | Version: 7.10.2 Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 Type of failure: Runtime | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #12602 | Differential Rev(s): Phab:D2533 Wiki Page: | -------------------------------------+------------------------------------- Comment (by varosi): Bad :-( So Haskell (compiled with GHC) is not parallel by default. If you see the advertising here https://www.haskell.org/ it speaks loud about concurrency and parallelism. In my code I use 'par' and it doesn't work if there is no compilation + run-time options... -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11054#comment:44 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler