[kmail2] [Bug 323536] New: displaying mail, marking as read is slow

[Roman K.]

https://bugs.kde.org/show_bug.cgi?id=323536

            Bug ID: 323536
           Summary: displaying mail, marking as read is slow
    Classification: Unclassified
           Product: kmail2
           Version: 4.11.0
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: roman.karlstetter at googlemail.com

Since I updated to KDE SC 4.11, kmail is very slow displaying mails, it takes 5
minutes or more for a mail to be displayed. The same problem appears when
marking it as read. While waiting for the mail to be displayed, kmail
apparently does some work, as CPU usage is at around 20%.

I tried to remove all mail filters, I disabled nepomuk mail indexing, but the
problem persists.
In akonadiconsole,  the mails display more or less instantly, so there seems to
be a problem in kmail. 

Reproducible: Always

Steps to Reproduce:
1. Select mail in folder/Mark mail as read
2. Wait
Actual Results:  
Mail is displayed/marked as read after 5 minutes or so

Expected Results:  
Mail is displayed/marked as read instantly

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