#13535: vector test suite uses excessive memory on GHC 8.2 -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.2.1 Component: Compiler | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #10800 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): As I suspected, there appears to be a large number of duplicate top-level bindings in the code that gets passed Core Tidy in 8.2. In particular, I count at least 25 copies of the same binding, {{{#!hs $s$wfoldlM_loop :: State# RealWorld-> [] Bool-> Int#-> MutableArray# RealWorld Bool-> Int#-> Int#-> (#,#) (TupleRep ([] RuntimeRep)) LiftedRep (State# RealWorld) (Vector Bool) {- Core Size{terms=209 types=244 cos=466 vbinds=7 jbinds=0} -} $s$wfoldlM_loop = ... }}} I'll need to work out why tomorrow. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13535#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler