The ASP.NET team has a new experimental Razor editor available for Visual Studio 2019 16.7 Preview 4 for you to try out. The new editor has several performance benefits and will include a new Razor Language Server. For complete details, be sure to visit the devblogs on Microsoft at https://jasong.us/30fD7O9.

To enable the new editor, install the latest Visual Studio preview and go to Tools > Options > Environment > Preview Features or search for Preview Features in Visual Studio search.

Try the new Razor editor for Visual Studio