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List:       kde-pim
Subject:    [Kde-pim] libkabc as a performance issue...
From:       Reinhold Kainhofer <reinhold () kainhofer ! com>
Date:       2003-09-06 14:07:04
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I just did some valgrinding of korganizer and I was quite shocked about the 
outcome (see attached screenshot of the most expensive function calls).
In this test I started korganizer, moved around some events, edit some, etc. 
and then closed korganizer.

Basically, what it says (as I understand it) is that 21.6% of the whole CPU 
cost of KOrganizer goes to loading the StdAddressBook (consisting of one .vcf 
file with only 330 addresses) !

The destruction is even more dramatic:
35% of the whole CPU cost goes to ~StdAddressBook ! Of that, 22.5% (of the 
overall cost) are used in KABC::VCardTool::createVCards (called from 
KABC::VCardFormatPlutin::saveAll).

What seems strange to me in this regard is that the StdAddressBook is saved, 
even though it wasn't changed at all. Maybe fixing this can already improve 
things a lot.


So, currently when running (starting and closing) korganizer, about 60% of the 
costs only goes to the addressbook library. I don't think this is acceptable. 
One has to note that these problems affect all applications and libraries 
that link to libkabc and use StdAddressBook.


Reinhold

PS: I really love the new attachment warning in KMail!
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["LibKABC_KCachgrind.png" (image/png)]

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