# Performance Improvements

- New bitmap pack index created during JGit GC speeds up clone/fetch. With this new index type JGit can now serve Git repositories considerably faster than C Git.
- DateRevQueue (used by RevWalk) is faster for many commits ( change Ie7b99f4).
- When using both C Git and JGit and `core.checkstat` is set to `minimal`, Git no longer has to revalidate a large number of files ( change I8eaff18).
- Updating many existing refs is faster as the unnecessary check for ref name conflicts is no longer done ( change I9057bc4).
- Speed up clone/fetch with large number of refs ( change I17d0b3c).
- Various improvements to packing/delta compression