title: Visual Studio very slow with C++
body: <p>I am new to C++ programming and have been setting up Unreal Engine 4 with Visual Studio 2019.
  The problem I am facing is that VS seems very slow to recognize my code in C++.
  For example, it can take more than 10 seconds to recognize that I wrote a method declaration and apply the proper color and give me intellisense (intellicode?) or show me any error. Same problem with variables and such. Code completion is pretty much never happening.</p>
  <p>It's unusable right now and I would appreciate if somebody have an idea of what's going on.</p>
  <p>I never have this problem in C#.
  I tried activate / deactivate extensions (just got a couple of them). I have ran a VS repair.
  I have a recent computer (i7 9k, 16gb RAM) running windows 10.</p>
  <p>Thanks in advance.</p>