#10800: vector-0.11 compile time increased substantially with 7.10.1 -------------------------------------+------------------------------------- Reporter: bgamari | Owner: bgamari Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 7.10.2 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 thomie): Compiling `vector` master with HEAD using a devel2 build (which means a stage2 compiler built with `-DDEBUG`), results in a low of warnings such as the following: {{{ *** Core Lint warnings : in result of Simplifier *** libraries/vector/Data/Vector/Generic.hs:221:1: warning: [RHS of length :: forall (v_a3hG :: * -> *) a_a3hH. Vector v_a3hG a_a3hH => v_a3hG a_a3hH -> Int] INLINE binder is (non-rule) loop breaker: length libraries/vector/Data/Vector/Generic.hs:1891:1: warning: [RHS of unsafeCopy :: forall (v_a38Q :: * -> *) (m_a38R :: * -> *) a_a38S. (PrimMonad m_a38R, Vector v_a38Q a_a38S) => Mutable v_a38Q (PrimState m_a38R) a_a38S -> v_a38Q a_a38S -> m_a38R ()] INLINE binder is (non-rule) loop breaker: unsafeCopy }}} Maybe this gives a clue to what the problem is. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10800#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler