[mapguide-internals] Review ImprovePerformance.patch

[Christine Bao]

Hi all,

     Please review patch http://trac.osgeo.org/mapguide/attachment/ticket/1069/ImprovePerformance.patch for ticket http://trac.osgeo.org/mapguide/ticket/1069.

     This patch improves performance by using the new API GetResourceContents(). LayerBase adds a constructor without initializing resource content, and the resource content is set and cached after getting them in a single request. Three use cases are affected:

1.       Open a tiled map with base layers.

2.       Open a normal map without base layers.

3.       Print map.

Thanks & regards,
Christine