50+ minutes CPU time for /tmp/ubuntu-release-upgrader-29r0z57l/mantic is excessive

[Russell Coker]

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 11954 51.0 1.2 555772 196136 pts/2 Rl+ 10:15 50:39 /usr/bin/python3 -s /tmp/ubuntu-release-upgrader-29r0z57l/mantic --mode=server --frontend=DistUpgradeViewText

This amount of CPU time on a i7-8665U is grossly excessive. According to Passmark the latest i9 CPUs are only about 2.5* faster than this one which means it would take 20+ minutes on an i9.

At least there should be an option for the user to skip this step.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: ubuntu-release-upgrader-core 1:23.10.14
ProcVersionSignature: Ubuntu 6.5.0-27.28~22.04.1-generic 6.5.13
Uname: Linux 6.5.0-27-generic x86_64
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CrashReports: 640:246836501:124:1780063:2024-04-19 10:21:42.539683522 +1000:2024-04-19 10:21:42.547683513 +1000:/var/crash/_usr_libexec_tracker-extract-3.246836501.crash
CurrentDesktop: KDE
Date: Fri Apr 19 11:39:48 2024
InstallationDate: Installed on 2023-04-14 (371 days ago)
InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in groups 'adm', 'systemd-journal' can see all messages.
       Pass -q to turn off this notice.
 No journal files were opened due to insufficient permissions.
PackageArchitecture: all
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: Upgraded to mantic on 2024-04-19 (0 days ago)
VarLogDistupgradeApttermlog: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-term.log'