#10491: Regression, simplifier explosion with Accelerate, cannot compile, increasing tick factor is not a workaround -------------------------------------+------------------------------------- Reporter: robertce | Owner: Type: bug | Status: new Priority: highest | Milestone: 7.10.2 Component: Compiler | Version: 7.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by bgamari): Replying to [comment:16 George]:
I was able to compile it with -fsimpl-tick-factor=150, not sure if
memory use was reasonable, cpu usage was close to 100%. As I wrote above:
when I do
ghc -O2 -fsimpl-tick-factor=150 Slice.hs
it quickly uses over 11G of memory. I'm not sure what the peak memory
use is or how long it took to compile as I let it run overnight (I have 12G of RAM on my Mac). The resulting binary of the 321 line source file is 51 MB What I'm a bit unclear on is that the bug description seems to suggest this behavior began at some point since the release of 7.10.1,
This has only happened since the release of 7.10.1 and it appears to still be happening in the ghc-7.10 branch.
However I am finding that the commits prior to the 7.10.1 release also exhibit the behavior. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10491#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler