@LadyWho - As you are using the "Update KB4559309 Makes Computer Unbearably Slow" thread, I must assume you are using Windows 10 devices. If so, please post and confirm, and post the actual version (version and OS Build info from running the "winver" command).
To do that, right-click the start menu icon, choose Run, key in winver and click on OK. Device makes/models, memory capacity would also be useful.
Secondly, you do not state what the "cleanup a weekly" is that is taking 25 minutes, more detail would be useful!
It may be that you are running an under-powered machine (weak CPU, not enough RAM installed for the tasks being done), with a very little free space on our hard disk, or that lots of unnecessary startup programs are running at boot, extra "scanning" stuff
(e.g. McAfee), more than one anti-virus active etc, so the update to the new edge failed to complete the favourites import (or the import script timed out).
All those above are just assumptions of course, as you have posted no details to work with to provide any constructive help.
If your problem is limited ONLY to EDGE performing badly, try downloading the latest Firefox browser, import any web account passwords and favourites from EDGE, and try that to see if it is better. I find it has a very good, useful built-in password manager.
It also has its own "private" DNS if you want to enable it (it is called DoH - DNS over HTTPS - it used Cloudflare as the default if you want to activate it).
If the issue still occurs there, then your issue is more system (OS) software related, resource related (lack of free memory, low free space on disk, weak CPU), or hardware (CPU power throttling due to overheating caused by clogged or failing fans/heatsinks),
or slow network issues (weak WiFi - too far from router). When was the last time you rebooted our router?
To narrow things down, check your disk free space, use the Task Manager to check CPU hogging/high activity, along with memory and disk activity. Download and use "speccy" from Piriform, to check your CPU temperature and speeds (it will show up throttling
when the frequency multiplier drops from say 30 to 8). Speccy will also show what memory hardware you have (so you can plan to upgrade it if you need to).