Matthew Dillon has added a “rebalance” feature to Hammer, which cleans up the underlying B-Tree structures in Hammer that might otherwise slow down searching. It’s considered experimental, so be careful with it for now.
A running description of activity related to DragonFly BSD.
Are you sure that’s a feature …or is it a fig leaf?
Matt tested it on the pkgsrc bulk build files from pkgbox, and reported it cleaned up a lot of B-Tree entries, as I recall, so it does do something.