A standing commit‑level study of open source engineering output.
One shared axis, one edition per quarter.
Cloudflare · Vercel · OpenAI · Google · Meta · Microsoft
No. 02 · published 7 September 2026.
Commit-level analysis across Cloudflare, Vercel, OpenAI, Google, Meta, and Microsoft. 699 qualifying engineers, six quarters. Performance per engineer is up 130% year over year, while the quarter-over-quarter change cannot be distinguished from zero — and, tested against a re-scoring of the same quarters, neither can the quarterly ranking.
Performance per engineer · % Δ vs. baseline quarter
Every edition keeps the numbers it was published with. Nothing is restated after the fact.
The next edition revisits the same cohort one quarter on, on the same axis. Ask to be told when it publishes.
One measure, applied the same way every quarter.
Every edition scores merged commits with the same two‑layer engine: classification is file‑scoped across Features, Maintenance, Tests, Docs and Fixes, and deterministic algorithms weight the change. Their sum is Engineering Throughput Value. Holding the measure fixed is what makes one edition comparable to the next.