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Git Internals by John Britton of GitHub - CS50 Tech Talk

CS50

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  • Presented by John Britton, GitHub

Intermediate. Assumes working knowledge.

92K views8 years ago1 recommendation

Tools and practiceSystems programmingGit and version controlData structures

John Britton explains how Git stores data under the hood using blobs, trees, commits, and references.

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What people say. Recommended as a clear explanation of how Git stores snapshots rather than diffs.

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u/tugaestupidoin r/programming • Recommends

On “Do we think of git commits as diffs, snapshots, and/or histories?”

No, It's the other way around. Git does not store diffs. They have to be computed from snapshots (commits). Commits contain a reference to a tree object. The tree object lets you know all the blobs (files) that make up that snapshot of the project (all files in your project). The blob objects contain the full contents of the files. There are never any diffs. link to this video In this video, they address this exact point at 32:15.
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