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2021-07-26Low-latency closure copyEelco Dolstra
This adds a new store operation 'addMultipleToStore' that reads a number of NARs and ValidPathInfos from a Source, allowing any number of store paths to be copied in a single call. This is much faster on high-latency links when copying a lot of small files, like .drv closures. For example, on a connection with an 50 ms delay: Before: $ nix copy --to 'unix:///tmp/proxy-socket?root=/tmp/dest-chroot' \ /nix/store/90jjw94xiyg5drj70whm9yll6xjj0ca9-hello-2.10.drv \ --derivation --no-check-sigs real 0m57.868s user 0m0.103s sys 0m0.056s After: real 0m0.690s user 0m0.017s sys 0m0.011s