[kmail2] [Bug 314523] New: Kmail is slow to move large amount of mails to wastebin then empty wastebin - pop account

[Philip Wyett]

https://bugs.kde.org/show_bug.cgi?id=314523

            Bug ID: 314523
           Summary: Kmail is slow to move large amount of mails to
                    wastebin then empty wastebin - pop account
    Classification: Unclassified
           Product: kmail2
           Version: unspecified
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: NOR
         Component: commands and actions
          Assignee: kdepim-bugs at kde.org
          Reporter: philip.wyett at cohere-tech.co.uk

Kmail is slow to move large amount of mails to wastebin then empty wastebin -
pop account

Kubuntu 12.04.1

KDE 4.8.5

Kmail 4.8.5

Hardware: Toshiba L850-112 laptop. i3 @ 2.3GHz, 6Gb RAM, SATA 2 HDD



Reproducible: Always

Steps to Reproduce:
1. Archive a folder. Not necessary for problem to occur.
2. Select all mails in a folder 10000+ a good example amount.
3. Click on 'Move to Wastebin'
Actual Results:  
Action is slow. Average is one mail processed per second.

High CPU usage. Forces system fan on constantly while action is taking place.

Expected Results:  
Expect them to be marked and moved to wastebin much faster.

No other mail application has this issue.

This is an horrific issue for those who get a lot of email. Archiving email
with this issue and cleaning out folders takes hours - productivity loss. I now
canot allow folders to have more than a certain amount of emails in because of
this issue.

This system has no imap accounts on it.

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