[Bug 291128] New: Switching between folders and initial listing of them is very slow

[der_fenix]

https://bugs.kde.org/show_bug.cgi?id=291128

           Summary: Switching between folders and initial listing of them
                    is very slow
           Product: kmail2
           Version: 4.8
          Platform: Archlinux Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: folders
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: derfenix at gmail.com


Version:           4.8 (using KDE 4.7.4) 
OS:                Linux

After some time of using kmail with imap accounts it is have lags when
switching between folders. I mean when I click to some folder all app is
freezing for 3-10 seconds and just then show folder's content. Same happenes on
start of kmail before folders and accounts list will shown.
I try to move .kde4 folder to .kde4~, login again and setup password and other
missed data to accounts settings and all starts work fine, but after ~week lags
are come back.
No errors found in ~/.xsession-errors

Reproducible: Always

Steps to Reproduce:
Just switch between folders in imap-accounts after some days of using kmail

Actual Results:  
freezing all app for 3-10 seconds before actually switch to folder

Expected Results:  
it must switch in max.1 second (how it do with clear profile or at first days
of using kmail)

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