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A survey of some advanced Git features to help Git scale to the largest monorepos. GitHub Nova, October 2021.
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Talking about Git performance features and contributing upstream. Software at Scale, September 2021.
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How can you make choices in your repository's structure to make it easier to scale? GitHub Universe, December 2020.
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How can we solve scale for Git? How does Scalar solve this problem? Microsoft European Virtual Open Source Summit, June 2020.
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How can we solve scale for Git? How does Scalar solve this problem? Git Merge, March 2020.
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Talking about my career path, contributing to Git and open source. Software Engineering Unlocked, November 2019.
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A discussion about Git, Git for Windows, and the commit-graph. Thrashing Code, September 2019.
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An intro to some deep Git concepts, NCSU Software Engineering, August 2019, January 2020.
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with Johannes Schindelin,
Git Merge 2018.
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The sparse index reduces the index size when using cone-mode sparse-checkout patterns, creating significant performance boosts for monorepos.
Git v2.32.0, v2.33.0, and v2.34.0
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A new builtin helps customize Git maintenance. Users can register their repositories to be maintained in the background using git maintenance start.
Git v2.29.0, v2.30.0, v2.31.0
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A new builtin helps users manage their sparse-checkout files. A new "cone mode" improves performance for a common pattern type.
Git v2.25.0
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Write the Git commit-graph after every git fetch operation, ensuring that the repo is optimized for the new objects.
Git v2.24.0
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Create new feature.* config options that group other config options together. Provides recommendations for users who do not want to read every config setting.
Git v2.24.0
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Speeds up
git commit-graph write by amortizing writes across many small writes (and few big writes).
Git v2.23.0
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Use the multi-pack-index to repack the object store incrementally in a highly-available environment.
Git v2.23.0
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Speeds up
git push for developers working in a small cone of a large repo.
Git v2.21.0
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Significantly speeds up
git log --graph calls when the commit-graph feature is enabled.
Git v2.20.0
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Verify the multi-pack-index file for corruption.
Git v2.20.0
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Collect and reorganize commit walking code, and improve several algorithms in the process.
Git v2.20.0
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Create a new file to index objects across multiple pack-files.
Git v2.20.0
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Verify the commit-graph file for corruption, and write the file automatically during repo maintenance.
Git v2.20.0
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Compute generation numbers in the commit-graph file and use them in some commit walks.
Git v2.19.0
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Create a new data structure and file format to store a compact representation of the commit history.
Git v2.18.0
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Significantly improve the mechanism for computing the shortest unambiguous abbreviation of an object ID.
Git v2.17.0
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Includes a description of the git maintenance command and background maintenance.
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Summarizes some of the Scalar announcement blog post, with additional details from an email interview.
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Prominently discusses the sparse-checkout feature
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Features a discussion of the sparse-checkout feature.
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Features a discussion of feature macros and fetch.writeCommitGraph.
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Features a discussion of multi-pack-index repack/expire and incremental commit-graph.
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Features a discussion of the incremental commit-graph feature.
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I was awarded a Google Open Source Peer Bonus for my contributions to Git.
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Links to BDFL.
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Features a discussion of the review around the new sparse push algorithm.
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Includes description of multi-pack-index feature.
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John Briggs discusses several Microsoft contributions and how they improve performance for the Windows OS repository. Features commit-graph, multi-pack-index, background prefetch, and sparse push algorithm.
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Features a summary of the support email thread "commit-graph is cool". Also discusses the RFC on Generation Number v2.
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Includes an update on the commit-graph feature (in the "Cooking" section).
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Highlighted in a developer spotlight.
