On Thu, Jan 28, 2021 at 10:39:16AM +0100, Vít Ondruch wrote:
> 2) I would really love you to stop using VMs for your build/testing. With
> exception of Kernel and Kernel related issues, the argument of "mock being
> slow" can't stand. Every VM will be more resources hungry then mock, slowing
> every your task.

The point of having a VM is to have a live installed OS so you can install
and test runtime functionality the builds after they have completed. Mock
is not generally a substitute for this because mock environment is not a
running OS, it is just a chroot, so only a subset of packages can be viably
tested inside mock.

> 3) The argument of mock being slow can't stand, because in one of my
> examples I posted elsewhere in this thread, I picked up the simplest package
> I could and the build took 7 seconds. This is certainly not slow, in this
> time you can't even switch to your email client to check your emails.

I don't see numbers anything like that good with 'fedpkg mockbuild',
Taking my "libvirt-glib" package as a test

'fedpkg local' - 30 seconds
'fedpkg mockbuild' - 60 seconds  (warm cache)
'fedpkg mockbuild' - 5 minutes  (no cache)

and that's on my fast laptop with fast SSD.

On my machine development server which is a few years older

'fedpkg local' - 48 seconds
'fedpkg mockbuild' - 2 minutes 30 seconds (warm cache)
'fedpkg mockbuild' - 6 minutes 50 seconds  (no cache)


In this case /home is on SSD, and / is HDD.

Thus mock ends up using the slower storage since it isn't using /home.

Regards,
Daniel
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