show layer usage percent locally in zoom

[iTrooz]

What do you think about adding another percentage to the hover text (or outright replacing the current one), to show the percent of usage in the current zoom ?

For example in this screenshot, the hover text could also say "10% in zoom". It would help to know more clearly what is taking execution time once we have determined the specific part of the program that we want to investigate

I'd be ready to open a PR for this if you're okay with the feature