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<P><FONT SIZE=2 FACE="Arial">I'm finding that the performance of the tooltips is varying greatly and I'd like to understand what is going on behind the scenes and therefore what factors are affecting this.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Presumably when the cursor s moved over the map, a mouseover event is triggered and this sends the position information and state of the layers is sent back to the server via an xmlhttprequest. The web extensions are used to identify what object on what layer is at the map location, and the tooltip data is queried and returned to the client, which is then displayed. So factors affecting this process will be what is happening on the client machine, the network, and the server at the time the process occurs.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">The performance seems to change a great deal from very good to unacceptably slow (the user would give up). I find this change strange because other applications (e.g. MapGuide 6.x) run from the same client to the same server are not varying nearly as much. It is also strange in that the initial request for the layout and subsequent requests for layer data are not particularly slow when the tooltips are. Are there any settings which can be altered to improve this? This kind of unreliability could almost rule this technology out in my view.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Keith</FONT>
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