a larger data for the gird probleam

so ,i use the gird for the web developing,but i used it in the report web show,then the data length more than 2000 or 3000...,then the IE was very slow,it like the ie is dead?why?this control can't to process the larger data?

Check that you have AW version 2 or 2.5 and set virtual scrolling mode to true

grid.setVirtualMode(true);

thanks for help?