Increase CI runner performance
First step would be
- pipe output through
ts %H:%M:%.S
to get timestamps (Gitlab does not have timestamps like TravisCI has)
Ideas:
- Smaller images, e.g. Alpine Linux
- gnulib submodule may be cloned locally (from filesystem)
- preinstall libidn2 clone, just git pull to update to latest !?
- remove --enable-gcc-warnings where not needed
- since environment seldom changes, use a cache file for ./configure -C ?