New Features
hg mv -A can now be used with --at-rev. It behaves just like hg cp -A --at-rev, i.e. it marks the destination as a copy of the source whether or not the source still exists but the source must exist in the parent revision).
New revset predicate diffcontains(pattern) for filtering revisions the same way as hg grep --diff pattern.
- The memory footprint per changeset and per file during pull/unbundle operations has been significantly reduced.
Internal API Changes
merge.update() is now private (renamed to _update()). Hopefully the higher-level functions available in the same module cover your use cases.
phases.registernew now takes a set of revisions instead of a list of nodes. phases.advanceboundary takes an optional set of revisions in addition to the list of nodes. The corresponeding members of the phasecache class follow this change.
The addgroup member of revlog classes no longer keeps a list of all found nodes. It now returns True iff a node was found in the group. An optional callback for duplicated nodes can be used by callers to keep track of all nodes themselve.
The _chaininfocache of revlog classes has been changed from a dict to a LRU cache.