I have some simple data flows I'm experimenting with.....
Publishing a dataflow can take several minutes so making changes is so terrible I'm giving up.
Refreshing a dataflow takes 10 minutes and then it fails.
I use power query elsewhere and it performs 100 times faster.
So a simple iteration or a change, adding a column to a table and the populating it takes 10 to 15 minutes.
Is it always this terrible? It's not worth using if it is