From: Don Zickus on
gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1975#note_1056...
Hmm. long ago, creating the linux tarball took a couple of minutes. So if
you were constantly running make dist-srpm and friends that couple of minutes
got annoying (much like how dist-configs got annoying). Not removing the
tarball was a nice optimization trade-off. Though it left the old ones
behind. Now for ARK those tarballs are outdated daily. RHEL not so much.
Not sure if today's tar/compression is parallelized to speed things up?