On big repositories compaction can take quite a while to run as it needs to create a full deep copy of the current root node state. For such cases it could be beneficial if we could partially compact the repository thus splitting full compaction over multiple cycles.
Partial compaction would run compaction on a sub-tree just like we now run it on the full tree. Afterwards it would create a new root node state by referencing the previous root node state replacing said sub-tree with the compacted one.
Todo: Asses feasibility and impact, implement prototype.