[Bug 285097] New: Just upgraded from kmail to kmail2, kmail2 is dead slow, uses a lot of CPU and 2Gb of mem

[Vidar L]

https://bugs.kde.org/show_bug.cgi?id=285097

           Summary: Just upgraded from kmail to kmail2, kmail2 is dead
                    slow, uses a lot of CPU and 2Gb of mem
           Product: kmail2
           Version: 4.7
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: vl at ez.no


Version:           4.7 (using KDE 4.7.2) 
OS:                Linux

Hi

First of all I just want to state that I have been a very happy kmail user for
many many years. For a long time kmail has been sinply the best email klient,
(IMHO)
However, I just upgraded to kubuntu 11.10, and then kmail was upgraded to
kmail2 too.
Now I am not so happy anymore....

I am sure accessing the maildirs via this akonadi thingy is a good idea if you
have a couple of hundred emails in total. If you have approx 400 000 and 6Gb it
is not....

Just checking email ( and there are like 10 emails on the pop3 server) takes
now at least 2 minutes, and during those 2 minutes the CPU load goes sky high.
("Syncing collection xxxxx" is what I think kmail is doing that takes so long.)

Then, reading emails is of course also dead slow, but that is already reported:
Bug 277770 - KMail2 is slow when accessing messages in folder
I do in particular have one folder were there are 160 000 emails (subscribe to
a few high traffic mailing lists for some years and you are there). This is the
folder that causes  most problems for kmail2 (also when checking email and
there are no emails that is supposed to be filtered to that folder ). 

So, is there way (or a plan ) for making it possible to let kmail access the
maildirs directly so that kmail becomes usable again? or in some other way fix
the performance bottleneck the new architecture obvious is ?

Best regards,
Vidar

Reproducible: Always

Steps to Reproduce:
Load kmail with 100 000 emails and see the performance, or the lack of it


Expected Results:  
kmail2 should have similar performance as kmail and be possible to use even
though you have many emails....

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