jqGrid multiselect使用大型本地数据和jQueryUI 1.8非常慢，jQueryUI 1.7很好

I am using jqGrid in an ASP.NET page and injecting the datainto a script block on the page and then loading from there. For this one use case it is necessary that we have a large amount of data visible on the screen at once. which involves 300~500 records with 30 columns on each row. Paging for this case is not a good fit. The user needs to be able to scan the mass amount of data, select 40~60 rows and then move off to another screen. I am using jqGrid in an ASP.NET page and inject