[Thuban-list] thuban very slow on low-end machine

Moritz Lennert mlennert at club.worldonline.be
Mon Jul 7 13:31:30 CEST 2003

Bernhard Reiter said:

>> For example: when I open Thuban, without any maps loaded, yet, and I
>> then
>> just move my mouse pointer back and forth over the Thuban screen, CPU
>> usage goes up to over 90%. As a comparison, doing the same in Sketch or
>> Mozilla, never pushes CPU over 30%.
> In any way thanks for the report.
> Can you give us more details about the system and about the version
> of Thuban and the library you are using ( check the About dialog for
> a start)?
> It would be also interesting to see the memory consumption.

Here's the About dialog (I don't know about the GDAL - not available
message, I installed the unofficial Debian packages of GDAL as available
from the Thuban download page.):

Thuban Release Version 0.8.1

Currently using:
	Python 2.2.2
	PySQLite 0.4.3
	SQLite 2.8.2
	GDAL - not available

Compiled against:
	GTK 1.2.10
	proj 4.4.7

I've been testing this config on a better machine today (Intel(R)
Pentium(R) 4 CPU 1.80GHz, and 512MB RAM), and obviously Thuban is much
faster and quite usable. However, I still get high CPU usage (up to over
60%) by just moving the mouse back and forth over an empty session. Memory
usage stays quite low (less than 5%, even when playing around with a >
20.000 polygon shape file), but I'll check that with my old machine when I
have the time.


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