revset: add depth limit to ancestors() This is proposed by the issue5374, and will be a building block of set{gen} (set subscript) operator. https://www.mercurial-scm.org/wiki/RevsetOperatorPlan#ideas_from_mpm # reverse(ancestors(tip)) using hg repo 2) 0.075408 3) 0.075951

dagop: compute depth in revancestors() generator Surprisingly, this makes revset benchmark slightly faster. I don't know why, but it appears that wrapping -inputrev by tuple is the key. So I decided to just enable depth computation by default. # reverse(ancestors(tip)) using hg repo 1) 0.081051 2) 0.075408