Re: Misc Developer News (#60)

[Emanuele Rocca <ema@debian.org>]

Hi,

On 2024-11-24 08:23, Sean Whitton wrote:
> 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?

Other than the speed of tarball unpacking, which as Johannes showed
isn't that much of a concern, one feature of schroot I'd been using is
in-memory union overlays, something like:

  type=directory
  directory=/srv/chroots/sid-arm64
  union-type=overlay
  union-overlay-directory=/dev/shm/

Writing to memory instead of disk during the build process improves
performance significantly. The equivalent in a sbuild+unshare world on
Bookworm seems to be:

  $unshare_tmpdir_template = '/dev/shm/tmp.sbuild.XXXXXXXXXX';

In Trixie /tmp is a tmpfs by default so no config needed at all?

I'm moving my setups to sbuild+unshare, thanks josch for your great
work.