Version: 2.0 beta1 (using KDE 4.5.80) OS: Linux I have a inbox with almost one thousand messages. List style is classic, sorting mode ascendant. I've tried with both oxygen windeco/style and pastique. It's really slow, either using the mouse wheel or moving the cursor manually. It's very fast on kmail 1.x on a slower computer, same inbox. Reproducible: Always
can't reproduce this using kmail 2.0.89. have tried different settings and none of them make it slow. my inbox has 4600 messages.
Ah. What could I try to define what make it slow here ? I'll try playing with the settings.
Ok, more information : it's really slow when kmail is checking for new email, ie, when i click the check mail button in the tool box. I was not the case in kmail 1. When idle, the speed is good. Not as good as kmail 1 i'd say, but sufficiently good.
Confirmed on gentoo, however, here the speed is always horrible, not only when checking for mail. CPU load also peaks (process kontact) when I scroll through the list. Happens even on small (200 entries) lists, and only in kmail (so no general Qt issue). Gentoo, kmail2 RC, Qt 4.7.2, list stile is classic, aggregation is standard mailing list.
Thank you Gael for your report and Andrei and Fuchs for your comments. 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, Martin