#11195: New pattern-match check can be non-performant -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): {{{ $ inplace/bin/ghc-stage2 Test.hs -package ghc -O +RTS -s [1 of 1] Compiling Test ( Test.hs, Test.o ) 22,902,711,336 bytes allocated in the heap 33,446,941,712 bytes copied during GC 2,960,993,984 bytes maximum residency (21 sample(s)) 15,073,104 bytes maximum slop 7835 MB total memory in use (0 MB lost due to fragmentation) Tot time (elapsed) Avg pause Max pause Gen 0 530 colls, 0 par 16.236s 61.556s 0.1161s 29.5767s Gen 1 21 colls, 0 par 8.853s 69.183s 3.2944s 61.3812s TASKS: 4 (1 bound, 3 peak workers (3 total), using -N1) SPARKS: 0 (0 converted, 0 overflowed, 0 dud, 0 GC'd, 0 fizzled) INIT time 0.001s ( 0.001s elapsed) MUT time 6.645s ( 60.820s elapsed) GC time 25.089s (130.739s elapsed) EXIT time 0.251s ( 1.432s elapsed) Total time 31.996s (192.991s elapsed) Alloc rate 3,446,736,733 bytes per MUT second Productivity 21.6% of total user, 3.6% of total elapsed gc_alloc_block_sync: 0 whitehole_spin: 0 gen[0].sync: 0 gen[1].sync: 0 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11195#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler