#9221: (super!) linear slowdown of parallel builds on 40 core machine -------------------------------------+------------------------------------- Reporter: carter | Owner: Type: bug | Status: new Priority: high | Milestone: 7.12.1 Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #910 | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj): Alternatively, give each thread its own `NameCache`. To do that, if one thread consumes a `ModIface` produced by another, it'd need to run over it, looking up all the `Names` to give them the `Unique` local to that thread. Not so very different to having entirely separate processes communicating through files; and the latter is perhaps easier to think about. So, yes. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9221#comment:24 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler