Check if we can use track to measure full transitions

[orballo]

child of #93

track is part of the react-devtools api.

[orballo]

I couldn't make it work properly. The Set is passed as a parameter to onRender but it's always empty.

[luisherranz]

React 16.5.0 has been released so we can try this again.

[luisherranz]

From what I'm reading in this post (video is for members only) the track function is now on the Schedule package, unstable_track:
we'll need the track function from the Schedule npm package. Let's install Schedule from the terminal, and then go to the to-do text input JS file. At the top, we'll import unstable_track as track from schedule/tracking. As a side note, the schedule API is unstable at the moment and could change slightly going forward.
https://www.npmjs.com/package/schedule

[luisherranz]

More info:
https://elijahmanor.com/react-devtools-profiler/

[luisherranz]

Even more:
https://reactjs.org/blog/2018/09/10/introducing-the-react-profiler.html

[luisherranz]

Even even more:
https://www.youtube.com/watch?v=nySib7ipZdk&feature=youtu.be