[mapguide-trac] #22: Improve AJAX Viewer Load Time

[MapGuide Open Source]

#22: Improve AJAX Viewer Load Time
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   Reporter:  robertbray   |       Owner:     
       Type:  enhancement  |      Status:  new
   Priority:  medium       |   Milestone:     
  Component:  General      |     Version:     
   Severity:  major        |    Keywords:     
External_id:               |  
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 I have noticed that load times for Maps with a large number of layers
 (20+) tend to be slow because it takes quite a while to generate and load
 the individual legend graphic images. In fact the more layers the slower
 the load time.

 It may be significantly better to generate one image strip that contains
 all of the legend images for a map and have each legend entry display the
 corresponding portion of the image strip. To further enhance performance
 that image strip could be cached with the !MapDefinition (as resource
 data) and only be regenerated when the !MapDefinition changes. A second
 strip could be maintained in session state for runtime layer additions to
 the map.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/22>
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