Hi! There has been discussion about this in the past: https://lists.gnu.org/archive/html/guix-devel/2019-10/msg00694.html Browse the thread, pipelining and reuse of connections are discussed. Julien did work on a patch regarding downloads (if I recall correctly it was to enable parallel downloads), I believe it's still hanging somewhere in the bug tracker. Tests are welcome! Cheers! -- Pierre Neidhardt https://ambrevar.xyz/