3 

     4  * The memory footprint per changeset and per file during pull/unbundle

     5    operations has been significantly reduced.

    23  * `phases.registernew` now takes a set of revisions instead of a list

    24    of nodes. `phases.advanceboundary` takes an optional set of revisions

    25    in addition to the list of nodes. The corresponeding members of the

    26    `phasecache` class follow this change.

    27 

    28  * The `addgroup` member of `revlog` classes no longer keeps a list of

    29    all found nodes. It now returns True iff a node was found in the group.

    30    An optional callback for duplicated nodes can be used by callers to keep

    31    track of all nodes themselve.

    32 

    33  * The `_chaininfocache` of `revlog` classes has been changed from a dict

    34    to a LRU cache.