Kmail is slow to move large amount of mails to wastebin then empty wastebin - pop account Kubuntu 12.04.1 KDE 4.8.5 Kmail 4.8.5 Hardware: Toshiba L850-112 laptop. i3 @ 2.3GHz, 6Gb RAM, SATA 2 HDD Reproducible: Always Steps to Reproduce: 1. Archive a folder. Not necessary for problem to occur. 2. Select all mails in a folder 10000+ a good example amount. 3. Click on 'Move to Wastebin' Actual Results: Action is slow. Average is one mail processed per second. High CPU usage. Forces system fan on constantly while action is taking place. Expected Results: Expect them to be marked and moved to wastebin much faster. No other mail application has this issue. This is an horrific issue for those who get a lot of email. Archiving email with this issue and cleaning out folders takes hours - productivity loss. I now canot allow folders to have more than a certain amount of emails in because of this issue. This system has no imap accounts on it.
Hi Philip, thank for your report and sorry for taking so long to answer it. It is about a version of KMail which uses Nepomuk and is unmaintained. Thus closing. If you still see performance issues please open new reports. But please follow the following guide lines to avoid unnecessary work for the developers: - Ideally test with KDEPIM and Akonadi 15.08. It contains some performance improvements like the binary protocol. - Otherwise at least use KDEPIM 4.14.10 and newest Akonadi 1.13 you can get as it already contains some performance improvements. - If you can wait, please retest with KDEPIM and Akonadi 15.12 once they become available for you. Akonadi 15.12 will contain *massive* performance improvements implemented by Dan due to new database indexes, optimized queries and leveled file_db directory. All of these are in master already, so if you dare use kdesrc-build to compile KF5, kdepim and kdepim-runtime. I am using this currently and it basically moves the bottleneck to KMail (displaying message list of huge folder). It is a *huge* improvement. And also Volker and Dan work to improve message list display speed as well. Thank you and greetings from KDE Randa Meetings,