We are loading 600-1000 records in a grid in a popup window. Without using virtualization, grid performance in IE10+ is very slow but excellent in Chrome. Currently we have virtualization turned on so we can get descent performance in IE. In an upcoming application we are not going to be able to use virtualization because of it's restrictions but will be fetching around the same number of records. I have attached the html used for the popup window and the grid. The grid is defined at line 121. I have also attached the controller where the grid options are defined, line 688 and the datasource used, line 648. Any advice on this would be very helpful.