On Mon, Jul 3, 2023 at 5:29 PM Thomas Monjalon <tho...@monjalon.net> wrote:
>
> 29/06/2023 14:58, christian.ehrha...@canonical.com:
> > From: Christian Ehrhardt <christian.ehrha...@canonical.com>
> >
> > By adding -j we build in parallel, to make building on multiprocessor
> > machines more effective. While that works it does also break
> > reproducible builds as the order of the sphinx generated searchindex.js
> > is depending on execution speed of the individual processes.
> [...]
> > -if Version(ver) >= Version('1.7'):
> > - sphinx_cmd += ['-j', 'auto']
>
> What is the impact on build speed on an average machine?
Hi,
I haven't tested this in isolation as it was just a mandatory change
on the Debian/Ubuntu side.
And the time for exactly and only the doc build is hidden inside the
concurrency of meson.
But I can compare a full build [1] and a full build with the change [2].
That is an average build machine and it is 35 seconds slower with the
change to no more do doc builds in parallel.
[1]:
https://launchpadlibrarian.net/673520160/buildlog_ubuntu-mantic-amd64.dpdk_22.11.2-2_BUILDING.txt.gz
[2]:
https://launchpadlibrarian.net/674783718/buildlog_ubuntu-mantic-amd64.dpdk_22.11.2-3_BUILDING.txt.gz
--
Christian Ehrhardt
Senior Staff Engineer and acting Director, Ubuntu Server
Canonical Ltd
