Add multiple rows to selection is slow, any faster way?

My User wanst to select all rows (> 200 rows) on Scheduler, and all selected rows should be highlighted.

I know there is a way to add rows one by one by calling dpScheduler.rows.selection.add(row).
However this function becomes very slow when I have more than 100 rows, which takes about 30 seconds to finish, which is not bearable.

I wonder if there is a faster way to add a collection of rows to dpScheduler.rows.selection in one shot?