#13059: High memory usage during compilation -------------------------------------+------------------------------------- Reporter: domenkozar | Owner: Type: bug | Status: new Priority: highest | Milestone: 8.2.1 Component: Compiler | Version: 8.0.2-rc2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86_64 Type of failure: Compile-time | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Good data -- but * The terms seem to get bigger by 25% and the types/coercions by up to 50%. That does not account for a ''quadrupling'' of memory usage, as reported in the Description. I wonder if there is a space leak, which is beoming more obvious with this program? Worth taking a space profile? * I doubt that messinng around with default-method generation is going to help much. After all, the user might write the source code as in the tweaked version. What we should focus on is what causes the program size to increase so dramatically. Is it just the usual nested-tuple thing (which I still do now know how to fix), or is there more afoot? Maybe take a small example (one small type, one default method) and compare before and after. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13059#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler