#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 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: -------------------------------------+------------------------------------- While building profiled executables with 8.2.1rc2 I've noticed the link times seem to have significantly regressed. I don't have a minimal test case. Testing on cabal head source tree {{{ cabal --version
cabal-install version 2.1.0.0 compiled using version 2.1.0.0 of the Cabal library cabal new-configure --enable-profiling --enable-newer --with- ghc=/opt/ghc-8.2.1/bin/ghc cabal build cabal-install
# hit Ctrl-C during linking time cabal build cabal-install }}} gives real 1m54.833s user 1m52.936s sys 0m1.620s doing the same with 8.0.2 links in less than a second -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13739 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler