+ - Migrating hashsplitting to C.
+
+ - Automatically splitting trees to avoid having to save large tree
+ objects for large directories even if only a few files have
+ changed or been added (e.g. maildirs).
+
+ - Moving all of the compoents of the index to sqlite. Right now the
+ main index is an mmapped file, and the hard link and metadata
+ databases are pickled. As a result the index isn't transactional
+ and suffers from bugs caused by "skew" across the components.
+