#14929: Program compiled with -O2 exhibits much worse performance -------------------------------------+------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- A user on reddit reports that compiling the program with `-O2` makes his program use a lot more memory. https://www.reddit.com/r/haskell/comments/84qovv/an_example_of_code_where_gh... It runs in constant memory without `-O2` and leaks memory with `-O2. It seems worth investigating as the example is quite small (< 1000 lines) and self-contained. https://github.com/luispedro/TestingNGLESS -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14929 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler