[kmail2] [Bug 338571] New: Performance Regression: Folder synchronisation in 4.14 very slow compared to kMail from KDE 4.13.x

[Gunter Ohrner]

https://bugs.kde.org/show_bug.cgi?id=338571

            Bug ID: 338571
           Summary: Performance Regression: Folder synchronisation in 4.14
                    very slow compared to kMail from KDE 4.13.x
           Product: kmail2
           Version: 4.14.0
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: misc
          Assignee: kdepim-bugs at kde.org
          Reporter: kdebugs at CustomCDROM.de

Since upgrading to KDE 4.14.0, kMail often is very slow when synchronizing
bigger IMAP folders (the IMAP server running locally).

Synchronisation literally takes dozends of seconds (for eg. folders containing
about thirty thousand messages [30,000]) during which I can see the progress
bar in the lower right window corner slowly advance to 100%.

Once a folder's sync completed, I can use kMail some time until this folder is
re-syncronized again that slowly. (Other folders may still interrupt work for
synchronization during that time, however.)

kMail from KDE 4.13.0 did never show this behaviour, sync was always pretty
fast.

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