[OpenLayers-Users] Draw US Counties really slow in IE

[Phil Scadden]

> browsers can't handle a large number of vector features, IE is far worse
> than other browsers, especially older versions.
I would echo this. Use WMS for your rendering, WFS for querying. With 
really complex geometries use WFS to fetch only feature attributes and 
render by
using SLDSelect. Beside the poor JS performance on older browsers, you 
dont want to be transferring around large packets of vectors.

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