On Mon, Sep 27, 2021 at 1:44 PM Robin H. Johnson <robb...@gentoo.org> wrote: > > On Mon, Sep 27, 2021 at 01:15:10PM -0400, Mike Gilbert wrote: > > On Mon, Sep 27, 2021 at 12:23 PM Mike Pagano <mpag...@gentoo.org> wrote: > > > > Adding linux-info calls to pkg_pretend or pkg_setup causes slowdowns > > > > when running emerge, so we should do so only when there is a > > > > compensating benefit. > > > > > > Is this a significant slowdown? Do you have any numbers? > > > > Adding a check for CONFIG_PACKET to the dhcpcd ebuild adds around 7 > > seconds of delay time to the pkg_setup and/or pkg_pretend phase on my > > system. > > > > That's ok if a small number of packages are doing it, but it would > > become quite annoying if a significant number of them get queued up. > 7 seconds is ridiculous.
I think the horribly slow performance is mainly due to this change in how we detect the kernel version: https://gitweb.gentoo.org/repo/gentoo.git/commit/eclass/linux-info.eclass?id=d1ea596f034285cd044006b107a60902ea059793 That causes "make" to be called 4 times, and each make invocation adds a couple of seconds to the get_version call.
