Issue title: Very slow installer
 Issue body: This is just an observation. The installer takes a very long time. Like 20-30 minutes. Nothing I ever install in VS takes that long. I guess it is what it is. I am surprised an extension takes that long to install. It makes me want to install it after work hours.
 Comments: 
 Comment 0: That is not something I have observed.  Wonder why. Maybe you can share some logs?
{'source': 'GithubIssues', 'repo_name_with_owner': 'ErikEJ/EFCorePowerTools', 'issue_id': 1343331792, 'repo_stars': 1306.0}