[KimDaBa] Profiling Kimdaba startup

Jesper K. Pedersen blackie at blackie.dk
Tue Jan 4 13:48:53 CET 2005


On Tuesday 04 January 2005 13:40, Robert L Krawitz wrote:
|    From: "Jesper K. Pedersen" <blackie at blackie.dk>
|    Date: Tue, 4 Jan 2005 07:46:37 +0100
|
|    Robert, thx for your profiling.
|
|    As it looks now, I can't see that there are any thing else I can do
|    to speed up things, except rewritting to a real database.  Well I
|    could delay loading the plugins, but it is a constant of 500msec in
|    your profiling, so I don't see much gained there either.
|
|    Rewritting to a real db would be a huge job, and currently I dont
|    see it worth it to save at most 2.5+1=3.5 secs. People with 50.000
|    images might disagree, but we aren't really there yet (at least
|    that is not what I hear from most kimdaba users), and once we are
|    there, computers are likely so much faster that the 25 secs has
|    gone done.
|
| The other possibility would be a faster XML parser, or getting
| Trolltech to improve their XML parser.
They already did wtih Qt 3.3.3 (which I asume you use, otherwise your loading 
would be much slower)

| I don't think this is critical.  The machine I ran this on is quite
| slow by today's standards (1 GHz).  By my calculation, on a 3 GHz
| machine (midrange by today's standards), startup for 50K messages
| would take about 10 seconds.  I suspect that getting a database (even
| a light weight database) to start up in much less than that amount of
| time wouldn't be that easy, either.
agree

| The only fly in the ointment is if processors gain more parallelism
| rather than single-threaded performance.  Even if single threaded
| performance simply stays at current levels, though, this doesn't look
| to be a major problem.

-- 
Having trouble finding a given image in your collection containing
thousands of images?

http://ktown.kde.org/kimdaba might be the answer.



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