It should be instantaneous, at least it is for me. Could you please confirm if you're using any plugin?

Also you might want to try this:

  • open the console as described at joplinapp.org/debugging
  • clear the console by clicking on the :no_entry_sign: button
  • then switch to a different note

The console should display a number of lines now. Could please share these lines? As that might help us figure out what is slow for certain users