Show ordering of calls in caller/callee graph

[egraether]

e.g. put a small number inside the arrow (like a small bubble in the middle of the arrow) that could visually show the ordering of the calls in the flow.

[ericlemasson]

Or just order the calls in the calling order in the diagram? If that is not possible because the layout is automatic, then yes, bubble with number is another solution.

[egraether]

The best solution in our opinion is optionally showing a bar next to the function on hover that displays leaving call edges ordered from top to bottom.