Hi Eric, Your patch seems go to me, even if I think the root cause of your problem is fixed by: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=33186#26 I think that both could be applied to core-updates. Thanks, Mathieu Le mar. 6 nov. 2018 11:27, Eric Bavier a écrit : > Hello Guix, > > I noticed building 'python-minimal' that its tests seemed to have poor > memory performance, i.e. using *a lot* of RAM. I thought maybe > dropping --cores=... would help, but it did not; the tests use all > available cores by default. The attached patch fixes this issue, > though, the package still uses all cores while building some extension > libraries. > > I suppose this patch would go to core-updates? > > Cheers, > `~Eric >