Thank you for contacting us.
Are you using the Sitefinity built-in server, available in the project manager? It is significantly slower than IIS (it's based on Cassini).
If this is the case, please try to setup a project on IIS, and check the performance there. I guess you will like it ;)
Thank you for your efforts, Rich. We will be waiting for your feedback, hopefully we will be able to improve the performance based on your tests.Sincerely yours,