Le Thu, 25 Nov 2021 13:53:25 +0100, Ludovic Courtès a écrit : > Hello, > > Julien Lepiller skribis: > > > After so long, I managed to find the time to go over the comments > > and improve my patches. I tested the new daemon for a bit, and it's > > working as expected so far :D > > On a recent daemon, have you seen cases where having multiple > downloads in parallel speeds things up? > > The analysis in > > suggests that at the time you first submitted this patch, substitution > speed (which is different from raw download speed) was often > CPU-bound. This is no longer the case, meaning that downloads should > now be network-bound or almost. > > Thanks, > Ludo’. I would still say yes, because the output from berlin is often much less than my throughput. With multiple downloads in parallel it at least feels quicker, probably because I can download at full speed. In any case, I see often a build start while downloads are in progress, so I think it's still a win if you can get a few derivations built while waiting for a big download to finish at the same time :) At some point we might want to prioritize builds/downloads that help unlock as much builds as possible early, so we don't have builds waiting for downloads.