ElementName vs. RelativeResource?

Question

What of the following TextBlocks\' Bindings costs more performance:

Answer 1

In general the ElementName should be used when possible.

The given example and benchmark example is quite simple. In real world examples the elements have a larger visual tree and the FindAncestor binding must traverse a lot more elements in order to find the element.

I gained SECONDS by changing some FindAncestor bindings to ElementName bindings in a real world application.

IMHO the ElementName binding is more readable, too.