revlog: ensure intermediate snapshot have decreasing size
If the intermediate snapshot is bigger than the previous one, there is likely
a better snapshot to be made at a different level.
Paul Morelle <paul.morelle@octobus.net> [Wed, 07 Mar 2018 12:28:04 +0100] rev 39188
revlog: bound number of snapshots in a chain
To limit the number of snapshot chained, we enforce them to be smaller and
smaller. This guarantee the number of snapshot in a chain will be bounded to a
small number.