This works if you know what each callee performs, which you frequently don't when you're visiting a new codebase (it may have an unknown function you have to re

This works if you know what each callee performs, which you frequently don't when you're visiting a new codebase (it may have an unknown function you have to read to know, functionality not relevant to your problem, or you may have to analyze two or more functions in the context of each other to understand a bug).