Implement optional defer row rendering for grid view (ZK_GRID_VIEW_USE_DEFER_RENDERING sysconfig client level setting, default to false). Should give faster paging response (you can try it out on the product window).
If this is a performance improvement, why not make it true by default? Does it have a bad consequence?
For SysConfig at client or org level is better that we add the migration script creating it.
There are UI rendering difference that people might not like, lets see how people like it first. Also, the performance difference isn’t really that big, it is just faster “first response” for paging.