#12790: GHC 8.0.1 uses copious amounts of RAM and time when trying to compile lambdabot-haskell-plugins -------------------------------------+------------------------------------- Reporter: clint | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): To elaborate on the observation that enabling `-fprof-auto` fixes the slowdown, it's because if you add an `SCC` pragma for `list`: {{{#!hs {-# SCC list #-} list :: Parser Expr list = ... }}} Then it also fixes the slowdown. (`-fprof-auto` was just doing this under the hood). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12790#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler