#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 erikd): From IRC: {{{ <bgamari> erikd, IIRC I have a more minimal testcase as well <bgamari> the problem centers around zip <bgamari> when things are inlined has changed <bgamari> which results in a large number of stream fusion primitives that can't be resolved until late in compilation <bgamari> which produces a large amount of code <bgamari> erikd, that should at least be a hint <bgamari> unfortunately I ran out of time before identifying the root cause <bgamari> erikd, https://gist.github.com/bgamari/2ca0f7d2a4e0b6447aee <bgamari> erikd, that's my minimized testcase <erikd> thanks, i'll check it out <bgamari> It helps to look at the -dverbose-core2core output <bgamari> comparing between the relevant compiler versions <bgamari> erikd, this utility may come in handy for turning the verbose-core2core output into something less unwieldy <bgamari> https://github.com/bgamari/ghc-utils/blob/master/split- core2core.py }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10800#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler