Nicolás Alvarez authored Nov 01, 2020 and Nicolás Alvarez committed Nov 01, 2020

apt-get uses several fsync() calls on each package it installs, and that's
very slow, especially on non-SSD. eatmydata turns fsync into no-op, which
makes package installation much faster (it can cause corruption if there's
power loss or similar, but that doesn't matter in CI where we throw away
the whole container anyway).

Currently the build_ubuntu_20_04 job in GitLab CI takes 8-9 minutes to
install dependencies. Using eatmydata it went down to 2 minutes.