largefiles: commit directories that only contain largefiles (issue3548) If we pass a directory to commit whose only commitable files are largefiles, the core commit code aborts before finding the largefiles. So we do the following: For directories that only have largefiles as matches, we explicitly add the largefiles to the matchlist and remove the directory. In other cases, we leave the match list unmodified.

revset.children: ignore rev numbers that are too low This replaces unnecessary parentrevs() calls with calculating min(parentset). Even though the min operation is O(size of parentset), since parentrevs is relatively expensive, this tradeoff almost always works in our favour. In a repository with over 400,000 changesets, hg perfrevset "children(X)" takes: Set X Before After -1 0.51s 0.06s -1000: 0.55s 0.08s -10000: 0.56s 0.10s -100000: 0.60s 0.25s -100000:-99000 0.55s 0.19s 0:100000 0.60s 0.61s all() 0.72s 0.74s The relative performance is similar for Mercurial's own repository -- several times faster in most cases, slightly slower for revisions close to 0 and all().

perf: add a command to measure revset performance