The Ext JS datachanged event.
During my recent performance testing with Ext JS I came across the Ext.data.Store datachanged event, which was causing some pretty large performance issues. The datachanged event is documented as fired “when the data cache has changed in a bulk manner (e.g., it has been sorted, filtered, etc.) and a widget that is using this Store as a Record cache should refresh its view.” This seems to be used often in the specific application I have been looking at, due to the…