[Bug 163469] New: big IMAP folders unusable slow because probably because of slow group list refreshing

[Frederik Himpe]

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http://bugs.kde.org/show_bug.cgi?id=163469         
           Summary: big IMAP folders unusable slow because probably because
                    of slow group list refreshing
           Product: kmail
           Version: 1.9.51
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kdepim-bugs kde org
        ReportedBy: fhimpe pandora be


Version:           1.9.51 (using Devel)
Installed from:    Compiled sources
Compiler:          gcc 4.3 
OS:                Linux

When I try to browse the contents of some big IMAP folders (> 5000 unread messages), the scrolling happens extremely slowly. Using top, I see kontact is using about 50% of CPU time, while X is using the other 50%. For some reason, this does not happen in other IMAP folders in which have even more messages (but less unread messages). Deleting or moving messages is also extremely slow from the problematic folders.