'''What does it mean''':
NOTE: Ideally at this point this section is just a verification. If the over-invalidation, reflows & event loop responsiveness is good then checkerboarding should be minimal to none.
Checkerboarding is when the app fails to keep up with the panning happening in the main process. When this happens a solid background color will be shown temporary until the page catches up.
'''Verification Steps''':
* Perform all common interactions with the app including heavy scrolling.
* Looks for the background color.
* Consider first repeating some of the previous steps to rule out over-invalidation, reflows and non responsive event loop.
== 8. Compositor FPS ==