Loading huge data with groupby enabled

I am having a big performance issue when loading >300 rows, does smart rendering work with groupBy feature enabled, Kindly help.

The performance tends to be better for FF than IE.I am using loadXMLString() to load data in the grid.

Smart rendering and grouping are mutually exclusive functionalities. If you need grouping effect try to use dhtmlxTreeGrid. dhtmlx.com/docs/products/dht … ndex.shtml