I'd like to know more about quantitative comparison
For example, I can use [zmap] object to map min/max from a range to another.
I can also use an expression object [expr].
what is the best to use ?
even if we can measure things, I talk about developers point of view.
Is there a rule about that?
A rule like: "using expr everywhere we can instead of other things cause it is more efficient" etc etc
I hope I'm not the only one interested by that ;)