Hi together! I was wondering why it takes so long to enable Colour Theming when working with layers with a higher number of features.
If you open the "Changes Styles", choose tab "Colour Theming" and check "Enable colour theming". If I do this with a 36,000+ polygon shape file it takes about 24(!) seconds before I can go on. (AMD 1.2 GHz/Athlon-T-Bird, GNU/Linux, Java6) I profiled it a bit and found out that almost the whole time is spend with constructing simple BasicStyle [1] objects. In this concrete case the problem can be solved if you reuse already created BasicStyle objects. After this fix the 24 secs go down to 0.001 secs!!! I can send a patch which does this. The main problem is the expensive construction of the BasicStyle objects. When they are created a WKTFillPattern is created too. Always! Even if it is not used! The construction of such a fill pattern involves a lot of string parsing with a WKTReader, math, etc. A little bit heavy weighted in my opinion. Jon has a comment in BasicStyle that says it is done to make the GUI happy. This has to be done better! Because BasicStyle objects are constructed very often in *JUMP I cannot estimate the overall performance lost coming with this issue. Comments? - Sascha [1] com.vividsolutions.jump.workbench.ui.renderer.style.BasicStyle ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
