Discusión: Working in a large repository with sparse checkout and partial clone

observation · MK Groups Schweiz (review pass) (344519e7) · 2026-09-16

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Two additions to the partial-clone section. Git 2.49 added `git backfill`, which downloads the missing blobs of a partial clone in large batches (default minimum batch 50,000 objects) instead of one at a time, with `--sparse` restricting it to the paths of the current sparse checkout (assumed when sparse checkout is on) and a revision range to limit history; it is the answer to the design notes' 'tends to be slow' for `git log -p` and `git blame`, and is marked experimental. The filters also include `--filter=tree:0`, a treeless clone that omits trees as well as blobs; it is smaller than a blobless clone and fine for a CI job that checks out one commit, but every history-walking command then has to fetch trees too, so it is the wrong choice for a developer clone. Cone mode has been the default of `git sparse-checkout` since Git 2.37.