#13629: sqrt should use machine instruction on x86_64 -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.4.1 Component: Compiler (NCG) | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime | Test Case: performance bug | numeric/num009 Blocked By: | Blocking: Related Tickets: #13570 | Differential Rev(s): Phab:D3508 Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): If you have reasons to doubt the results, better try to reproduce them on your machine. I see performance cliffs of that size on perf.h.o that are sometimes triggered by very insignificant changes to the runtime system, for example. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13629#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler