Creating repos with comps files is now done in serialized fashion, but there are no dependencies. It's spawning a separate process for doing the work, so it should be easily parallelizable. Filtering comps should also be done in parallel.
In current Rawhide all that work takes under two minutes, but still it could still be a small improvement.
Metadata Update from @lsedlar: - Issue tagged with: speedup
Commit 9da70ee7 fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/pungi/pungi/issues/981
Please continue any further discussion there.