#13739: Very slow linking of profiled executables -------------------------------------+------------------------------------- Reporter: duog | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1-rc2 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Compile-time | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * cc: rwbarton (added) Comment: Commit 283acec1d7307fdbd8cd7b3f1d984a036366d6b4 (Make split sections by default work again) is what caused the other regression. Before that commit, I obtained these times with duog's script: {{{ (Without -fwhole-archive-hs-libs) real 0m0.306s user 0m0.260s sys 0m0.028s (With -fwhole-archive-hs-libs) real 0m0.056s user 0m0.036s sys 0m0.012s }}} Notice that the `-fwhole-archive-hs-libs` times are pretty much identical to the GHC 8.0.2 times I found in comment:9. After that commit, I obtained: {{{ (Without -fwhole-archive-hs-libs) real 0m4.656s user 0m4.548s sys 0m0.088s (With -fwhole-archive-hs-libs) real 0m0.056s user 0m0.040s sys 0m0.008s }}} Which is basically identical to the times I found pre- b207b536ded40156f9adb168565ca78e1eef2c74. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13739#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler