After looking back at my tests, the situation should be significantly better with GHC 7.10.2 based on my quick examination; the resident memory usage for me at least looks to be closer to 2GB on my machine. However,
#10289: compiling huge HashSet hogs memory -------------------------------------+------------------------------------- Reporter: zudov | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Runtime | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by zudov): I've just tried to run the build, and it still runs OOM. I guess travis just doesn't have enough memory. https://travis-ci.org/zudov/html5-entity/jobs/69424559#L519 Replying to [comment:4 thoughtpolice]: the total build time seems to be worse (1m52s to compile `EntrySet` at `-O2` vs your Travis machines ~30 seconds, but only a maximum residency of 2GB).
So there's still more to be done here, but enabling -O2 shouldn't
cripple you anymore at least.
Would you mind giving this a go with the latest `ghc-7.10` branch (or
the 7.10.2 RC, which will be out soon?) You can use Herbert's PPA in combination with travis to get automated testing. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10289#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler