Webpage with paged grid and 1000 rows per page takes ~15sec in IE11, ~2sec in Chrome

I'm using a 3rd party javascript UI library (dhtmlx) to implement a paging grid with 1000 rows per page, they send me to you since they claim to have no control over the underlying browser mechanics. Profiling the workload  points to 6 time hogs all in IE11 offsetWidth(), innerHTML(), clientWidth(), scrollLeft(), appendChild() and removeNode(). Is there any way to speed up performance to get same or better time than Chrome. Most of our customers use IE11, hence the issue.

Thanks in Advance.