Hi, Quoting Sean Whitton (2024-11-24 01:23:24) > This is interesting. One concern I have is speed -- isn't it always slower > to have to unpack a tarball before the build instead of having a chroot under > /srv/chroot that's always unpacked?
that is correct. Unpacking a tarball takes time. Having an already unpacked directory present will be faster. Lets look at how slow unpacking a buildd chroot tarball is in practice. My machine is an ARM Cortex A73 with 3.6 GB RAM. $ time sudo tar -C chroot -xf ~/.cache/sbuild/unstable-arm64.tar sudo tar -C chroot -xf ~/.cache/sbuild/unstable-arm64.tar 0.01s user 0.02s system 2% cpu 0.983 total This number will of course be different on your system. If your system is slower than mine or if your chroot tarballs contain a lot more pre-built packages, then unpack times will be longer than this. In principle, unshare mode can also work with directories. Helmut is working on something in that direction. But for me personally, one second of unpack time is not enough of a motivation for me to put time into directory+overlayfs support. But of course patches welcome! Thanks! cheers, josch
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