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

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