I have a data-bound read only flygrid. It has somewhere between 100 and 10000 rows in it, and each row has a single nested row with a separate set of columns.
The top-level columns are mostly smartfit, and one is autoheight, so displaying, sorting, and filtering is understandably a bit slow - it takes about 4 seconds to redraw the 10000 row flygrid on any sort or resize operation.
The nested columns are all exact fit, default options, yet when I expand any node, it takes about four times longer to expand than it did to just display the initial table. For instance, if I expand one of the nodes in the 10000 row flygrid, it takes about 15 seconds, despite not really having to reflow anything. It even takes about 8 seconds to collapse the node.
Is there any way to make the expand/collapse node times comparable to the top-level display times? If it were 4 or 5 seconds for a 10000 row grid, it would be just fine.