Visual Studio 2017 15.8 or later include a menu item: Build > ASP.NET Compilation > Optimize Build Performance for Solution.
Screenshot of the new menu item
ASP.NET compiles its views at runtime, which means that an ASP.NET project carries with it a copy of the compiler. However on a developer machine when the copy of the compiler doesn't match Visual Studio's copy, build performance is impacted on the order of 1-3 seconds per incremental build. This feature updates your project's copy of the compiler to match Visual Studio's, which usually speeds up incremental builds.
This is applicable to ASP.NET Framework 4.7.1 or later projects only, it does not apply to ASP.NET Core.