http://www.charlesandhudson.com/archives/hand-tools-list-important.jpgPPT_LOGO_4b
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Autodesk Confidential Information November 2008
•全部或者部分的图层图例可以按需生成从而减少了网页布局初始加载时间
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•Preliminary testing shows, display a map may take 12 seconds, loading the legend of each layer may take 0.003-0.1 seconds. With the new implementation, 30% of the time can be saved from the initial loading when the map has 200 layers.
动态图例生成
MapGuide Enterprise 2011
In previous release, all the legend pictures are generated when the map is loaded, even they are not shown, this may cause performance problem when we have many layers, e.g. 700+.  In new MGE 2011, the legend picture can be generated only when need. It will improve performance greatly when we have many layers in map.