Re: gdal build times increased massively. debuginfo? libarrow?

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On Thu, Aug 21, 2025 at 2:30 PM Stephen Gallagher <sgallagh@xxxxxxxxxx> wrote:
>
> On Thu, Aug 21, 2025 at 1:49 PM Frank Ch. Eigler <fche@xxxxxxxxxx> wrote:
> >
> > Hi -
> >
> > > > > > koschei build Jul 06 - 55 minutes:
> > > > > > https://koji.fedoraproject.org/koji/taskinfo?taskID=134622296
> > > > > > full build Jul 10 - 32 hours 13 min
> > > > > > https://koji.fedoraproject.org/koji/taskinfo?taskID=134741067
> >
> > > > > > find-debuginfo: starting
> > > > > > Extracting debug info from 43 files
> > > > > > and has been there for hours.
> >
> > > > > > So, did the static debuginfo collection change affect this?  [...]
> >
> > Yes, likely.  A good question is *why*.  These operations basically
> > copy potentially large files out and into .a files and perform very
> > little computation.  Are the builders seriously RAM or I/O starved?
> >
>
> I can reproduce this behavior on my local workstation and it's
> probably not RAM or I/O starved (64 GiB of RAM and a very fast SSD).
> The behavior with 5.2 is much, much slower than 5.1.
>
> I was able to build gdal 3.10 in a little under an hour with `fedpkg
> mockbuild` on the F42 buildroot. It was spending hours on
> single-threaded `ar` calls. Is there any possibility of parallelizing
> that?

Sorry, those last two sentences were meant to be added to the next
paragraph. Putting them here completely reverses what I was trying to
say. Whoops.

>
> I gave up after about three hours on the 3.11 build on the F43
> buildroot since I found this probable cause.
>
> > I'll do a trial build here with a relatively unconstrained machine for a
> > closer look.  In the mean time, any package experiencing unacceptable
> > growth in build time or space can add this into their .spec to restore
> > the status quo ante:
> >
> > %undefine _preserve_static_debuginfo
> >
> > - FChE
> >

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