Hi there
One possible thought that you might consider trying would be to adjust the settings for "speed optimization". I have no clue if it will help, but it might be worth trying. As with anything, trade-offs are involved.
To adjust this, you edit the Single Source Layout properties. Click Navigation in the left panel, then choose "Local PC or Intranet".
For the test, you will likely need to make this change for ALL projects involved and re-generate each of them. Then test.
Cheers... Rick