So this is a decision I often have to make, is it faster to run back to base or Recall?
For those unaware recall is a 8 second cast time before instantly being transported back to base; thus we can rephrase this question as: "When are you 8 seconds of running time away from the fountain?"
This rephrasing allows us to realize that there is a parameter here: Hero speed.
Thus for me to make this decision, ideally I'd like to know the 8 second distance for a couple common speeds to use as rules of thumb. Specifically:
Preferably this would be a picture for easy reference.