[Bug 198026] New: moving imap messages between folders on remote server -- very slow

[David Rankin]

https://bugs.kde.org/show_bug.cgi?id=198026

           Summary: moving imap messages between folders on remote server
                    -- very slow
           Product: kmail
           Version: unspecified
          Platform: SuSE RPMs
        OS/Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: drankinatty at suddenlinkmail.com


Version:            (using KDE 4.2.90)
Installed from:    SuSE RPMs

There is something horribly inefficient in kmail's handling of message
transfers between imap folders on the remote server that makes it look like
kmail is copying the message to the local computer and then copying them back
to the new folder on the remote server.

I have used thunderbird for years, but with kde4, I resolved to use kmail. POP
handling seems fine, but imap handling seems horribly slow compared to
thunderbird. I manage the mail server I am connecting to so I can provide logs
or other information if you need to look at the server communications.

With tbird, when doing large moves between folders on the server, it looks like
tbird just submits a list of what needs to be done to the server and it happens
instantly. With kmail, you start the same transfer and then the status
indicator rambles around on the lower right of the status bar for a few minutes
and if you select the details you see every message being individually handled
as the list scrolls up and down the page.

Somehow, there must be a way to improve the imap handling so kmail performs a
bit better. I don't know what the different ways are to do the message
manipulation between folders with imap, but I do know that kmail appears to
take 10 times as long to do the same imap message transfers compared to
thunderbird.

I think kmail has really made many great improvements in its kde4.3 beta state,
but this is one are that really needs work. Thanks.

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