What does the git commit-graph file do and how does it improve performance?

Question

Git — Hard

What does the git commit-graph file do and how does it improve performance?

Accepted Answer

The git commit-graph file serves as a binary cache, storing pre-computed commit graph data to accelerate operations. This enables significant speedups by avoiding repeated object database traversals. The correct answer is right because it accurately describes the file's purpose and benefits. Other options are incorrect as they misrepresent the file's function.