[Chameleon] Performance measuring question

Paul Spencer pspencer at dmsolutions.ca
Wed Apr 12 07:20:25 EDT 2006


you 'might' get some performance gain out of building a shptree index  
for your shape file and perhaps tiling it ... not sure.  In general,  
I would more likely suspect Chameleon since it produces quite heavy  
load on the server.  Running php as a module should be possible, and  
could give you some performance gain.



On 12-Apr-06, at 6:14 AM, Gambin Dejan wrote:

> Hi list,
> I have finally finished my first serious Chameleon application. It is
> working very good, but I would like to see if there are possibly some
> performance problems that can be solved because I am experiencing slow
> map drawing sometimes (when zooming in)....I'll try to be more  
> detailed:
> My current application has several layers of which the one is raster
> layer defined over 12 tif files (40MB each) that I joined using
> tileindex..I have also internally tiled and created internal overviews
> on each of the tif files...
> Next I have the main layer, that is roads...it is a LINE shape that  
> has
> about 1MB (and its dbf has only 73KB with 247 records). This layer is
> also labeled with two lines, one is overlayed over the other...
> My questions are:
> 1. Since the data I presented shouldn't be "heavy" and assuming  
> testing
> on my localhost - what can be the main reason for sometimes slow map
> drawing? I am using JSAPI mode
> 2. How to debug it on Windows? How can I see what is causing this
> slowness? I would like to know if hardware is the reason (disk  
> subsystem
> or RAM) or the application...
> 3. I have created my own buttons and icons...maybe they are  
> "heavy"? Are
> they somehow cached? What about the caching anyway?
> Any suggestions are welcome
> Thanks very much
> regards, dejan
> _______________________________________________
> Chameleon mailing list
> Chameleon at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/chameleon

|Paul Spencer                           pspencer at dmsolutions.ca   |
|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|

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