I am now seeing that it is only slow in one account and only in the InBox. I've compacted. I delete the Global Database to re-index based on this: https://support.mozilla.org/en-US/kb/rebuilding-global-database
I don't know what has happen but I am having the same, incredibly slow issues. I'm on 115.13.0, Windows 10. It takes 30 seconds to delete an email! During that time, TB becomes totally unresponsive. I've tried compacting folders but no improvement. T...