On +2020-04-27 18:00:05 +0200, Mathieu Othacehe wrote: > > Hey Tobias, > > > guix-comm...@gnu.org 写道： > >> + ;; XXX: Temporarily disable compression to speed-up the tests. > >> + (compression? #f))) > > > > Interesting! What kind of improvement do you see, roughly? > > I posted some figures here: > https://lists.gnu.org/archive/html/guix-devel/2020-04/msg00374.html. > > Here's a more complete summary: > > --8<---------------cut here---------------start------------->8--- > | | Host (wip-disk-image) | VM (master) | > |----------------+-----------------------+-------------| > | No compression | 4min | 12min | > | Compression | 8min | 19min | > --8<---------------cut here---------------end--------------->8--- > > > When I added zlib compression I was surprised to learn that here it made no > > significant difference in wall clock time (less than a minute; 5% or so) or > > CPU time. The disks they spin and CPU she is fast, but still I would have > > noticed a spike. > > Strange we have different results, those benches are not very accurate > though.
Might it throw some light to see your different results for --8<---------------cut here---------------start------------->8--- $ lscpu|grep -i bogo $ top -n1|grep ^MiB --8<---------------cut here---------------end--------------->8--- At least I'm curious :) > > Thanks, > > Mathieu > -- Regards, Bengt Richter
