Reproduction steps:
1. Open the 2017.4 Project attached in the original case description (the archive size is over 5gb).
2. Go to 'Window > Profiler'.
3. Click 'Deep Profile'.
4. Play the 'StartYux' scene.
5. Wait for it to load.
6. Click the red X button in the game console if it overlays the game.
7. Click Login and connect via Email. Use the provided credentials in the original case description.
8. Progress by following the game suggestions until you reach a list of cards (unity-2017-scroll-profiler.mov).
9. Drag a card list to the left and right to reinforce a reproduction.

Actual behavior:
- You should notice a performance drop in EditorOverhead (Screenshots attached for versions 5.6 and 2017.4).
- Performance drops down to 1.5 FPS in Unity 2017.4 and only to 12 FPS in Unity 5.6.
- 5.6 Project is attached to compare the behavior between 5.6 and 2017.4 versions of Unity.

Expected behavior:
- Similar or small performance difference using different Unity versions.

Notes:
- Profiler reports attached in the original case description.
- Projects are huge and don't move between versions very well.
- Contact @juanpablo for more information.

Reproduced with:
2017.4.1f1

Not reproducible with:
5.6.4p4