Maybe a symptom of an AFPS bug? https://gregoryszorc.com/blog/2018/10/29/global-kernel-locks-in-apfs/
Just came across this, might be worth a look. Cheers, Gabor On 10/26/18, Richard Eisenberg <r...@cs.brynmawr.edu> wrote: > Hi devs, > > I have a shiny, new iMac in my office. It's thus frustrating that it takes > my iMac longer to build GHC than my trusty 28-month-old laptop. Building > devel2 on a fresh checkout takes just about an hour. By contrast, my laptop > is done after 30 minutes of work (same build settings). The laptop has a > 2.8GHz Intel i7 running macOS 10.13.5; the desktop has a 3.5GHz Intel i5 > running macOS 10.13.6. Both bootstrapped from the binary distro of GHC > 8.6.1. > > Watching GHC build, everything is snappy enough during the stage-1 build. > But then, as soon as we start using GHC-produced executables, things slow > down. It's most noticeable in the rts_dist_HC phase, which crawls. Stage 2 > is pretty slow, too. > > So: is there anything anyone knows about recent Macs not liking locally > built executables? Or is there some local setting that I need to update? The > prepackaged GHC seems to work well, so that gives me hope that someone knows > what setting to tweak. > > Thanks! > Richard > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs > _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs