Closing tab very slow on large records

[jkuiper]

I have data table with more than 100000 records. Datareading is very fast, but closing the tab, will take more than 20 seconds. Why?

[Duke]

For correct table closing we must fetch all data from server. Otherwise application may break normal client-server data exchange.
To avoid this you can use paginal mode when retrieving data. See Tools->Options->Data Editor->General for options.