Need a depth-first search, rather than breadth-first, for performance (and implementation of $..abc)

[James Powell]

Paths like, for example $[*].*[*].abc are very slow, as searches work breadth-first, making this involve multiple passes through the JSON. A depth-first search would by one pass, regardless of path depth.

This would also, I think, make implementing the“any depth” path (..) easy.