I am still getting terrible performance. I've measured the report execution times for both Chrome and IE with varying number of rows. Please see the results below.

(The SQLServerCentral forum does not appear to keep the spaces in the table below intact, so unfortunately it looks messy and compressed)

Duration (seconds)

RowsIEChrome

121

221

421

821

1631

3231

6451

12891

256181

512331

1024672

20481282

4096n/a4

8192n/a9

16384n/a18

32768n/a36

65536n/a75

As you can see, IE's performance is abysmal. The duration for IE beyond 2048 rows is not listed because it would over 2 minutes and thus unusable.