I'm a software engineer working at Microsoft on Git and VFS for Git. This is my personal webpage, which includes links to things I've done throughout my entire career. Opinions are my own.

• Twitter: @stolee
• GitHub: derrickstolee
• HN: stolee
• Email: last name at g mail
• Google Scholar Profile
• Old Academic Homepage

• 
  Updates to the Git Commit Graph Feature

  Azure DevOps Blog, 2019

• On Mental Toughness (for Software Engineers): How the Best of the Best Get Better And Better

  Stolee's Dev Blog, 2019

• 
  Exploring new frontiers for Git push performance

  Azure DevOps Blog, 2019

• 
  Building stolee.dev

  Stolee's Dev Blog, 2019

• 
  Supercharging the Git Commit Graph IV: Bloom Filters

  Azure DevOps Blog, 2018

• 
  Supercharging the Git Commit Graph III: Generations and Graph Algorithms

  Azure DevOps Blog, 2018

• 
  Supercharging the Git Commit Graph II: File Format

  Azure DevOps Blog, 2018

• 
  Supercharging the Git Commit Graph

  Azure DevOps Blog, 2018

• How to Contribute to Git (on Windows)

  Azure DevOps Blog, 2018

• Microsoft's Performance Contributions to Git in 2017

  Azure DevOps Blog, 2018

• Derrick Stolee on making Git faster, contributing to open-source, and creating win-win-win situations for all involved

  Talking about my career path, contributing to Git and open source. Software Engineering Unlocked, November 2019.

• Emerald City Technology Conversations with Derrick Stolee!

  A discussion about Git, Git for Windows, and the commit-graph. Thrashing Code, September 2019.

• Advanced Git for Beginners (PDF Slides)

  An intro to some deep Git concepts, NCSU Software Engineering, August 2019.

• Building Git for Windows

  with Johannes Schindelin, Git Merge 2018.

• `fetch.writeCommitGraph`

  Write the Git commit-graph after every `git fetch` operation, ensuring that the repo is optimized for the new objects. Git v2.24.0

• Feature macros

  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

• Incremental commit-graph format

  Speeds up git commit-graph write by amortizing writes across many small writes (and few big writes). Git v2.23.0

• Multi-pack-index expire/repack

  Use the multi-pack-index to repack the object store incrementally in a highly-available environment. Git v2.23.0

• "Sparse" push algorithm

  Speeds up git push for developers working in a small cone of a large repo. Git v2.21.0

• Generation-number aware topological sort algorithm

  Significantly speeds up git log --graph calls when the commit-graph feature is enabled. Git v2.20.0

• git multi-pack-index verify subcommand

  Verify the multi-pack-index file for corruption. Git v2.20.0

• Rewrite commit walking code

  Collect and reorganize commit walking code, and improve several algorithms in the process. Git v2.20.0

• Multi-pack-index

  Create a new file to index objects across multiple pack-files. Git v2.20.0

• git commit-graph verify subcommand and gc.writeCommitGraph config option

  Verify the commit-graph file for corruption, and write the file automatically during repo maintenance. Git v2.20.0

• Generation numbers

  Compute generation numbers in the commit-graph file and use them in some commit walks. Git v2.19.0

• Commit-graph

  Create a new data structure and file format to store a compact representation of the commit history. Git v2.18.0

• Speed up abbreviation algorithms

  Significantly improve the mechanism for computing the shortest unambiguous abbreviation of an object ID. Git v2.17.0

• Git Rev News 57 (November 20th, 2019)

  Features a discussion of the sparse-checkout feature.

• GitHub Blog: Highlights from Git 2.24 (November 4th, 2019)

  Features a discussion of feature macros and `fetch.writeCommitGraph`.

• GitHub Blog: Highlights from Git 2.23 (August 6th, 2019)

  Features a discussion of multi-pack-index repack/expire and incremental commit-graph.

• Git Rev News 52 (June 28th, 2019)

  Features a discussion of the incremental commit-graph feature.

• Google Open Source Peer Bonus Winners, 2019

  I was awarded a Google Open Source Peer Bonus for my contributions to Git.

• Git Rev News 50 (April 29th, 2019)

  Links to BDFL.

• Git Rev News 48 (February 27th, 2019)

  Features a discussion of the review around the new sparse push algorithm.

• GitHub Blog: Highlights from Git 2.21

  Includes description of multi-pack-index feature.

• Technical contributions towards scaling for Windows - Git Merge 2019

  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.

• Git Rev News 45 (November 21st, 2018)

  Features a summary of the support email thread "commit-graph is cool". Also discusses the RFC on Generation Number v2.

• GitHub Blog: Highlights from Git 2.19

  Includes an update on the commit-graph feature (in the "Cooking" section).

• Git Rev News 42 (August 22nd, 2018)

  Highlighted in a developer spotlight.

• 
  BDFL : A 100% accurate simulation of OSS maintenance

  A silly clicker game featuring graphs.
  Source code

• 
  Small Numbers

  A collection of source code and values for functions in extremal combinatorics.
  Source code

The source code for this website is available at https://github.com/derrickstolee/stolee.dev.