Read, verify, and traverse git commit graphs.
A [commit graph][Graph] is an index of commits in the git commit history. The [Graph] stores commit data in a way that accelerates lookups considerably compared to traversing the git history by usual means.
As generating the full commit graph from scratch can take some time, git may write new commits to separate [files][File] instead of overwriting the original file. Eventually, git will merge these files together as the number of files grows.