The 500 OSS Performance Index

Repository snapshot

Performance · 90d

7.2ETV

+270.0% since Q2 2025

ETV / dev / mo

1.2ETV

3 devs · 30-day window

Last 7 days · per dev

0.2ETV

per developer per week

Work mix

Growth26%· 6.7Maintenance66%· 16.9Fixes8%· 2.1

25.8 ETV all-time220 commits4 all-time devsJan 2025 – Jun 2026

Monthly reports

Highlights
Introduced robust *client API version support* via [65d79c66 · Steve Hipwell], enabling better compatibility management.
Added comprehensive support for *GitHub Copilot cloud agent configuration* ([4eb6c2cf · Shivam Kumar]) and *typed Copilot metrics download helpers* ([f96883e3 · kyungseopk1m]), significantly expanding Copilot integration capabilities.
Implemented a major architectural refactoring of the *GitHub client constructor* to an *options pattern* ([d9f99978 · Steve Hipwell]), enhancing flexibility and extensibility.
Refactored multiple API methods to introduce *pagination iterators* for `ListConsumedLicenses` ([b0245f17 · Glenn Lewis]), `ListAllRepositoryRulesets` ([4a6d2a98 · Glenn Lewis]), and `ListRulesForBranch` ([aeea0d20 · Glenn Lewis]), improving handling of large datasets.
Enhanced *code security configuration* with new fields for *Dependabot* and *Secret Scanning* ([95624307 · BananenBär], [3ad46654 · Jam Balaya]).
Improved *issue management* by adding support for *issue field values* ([6b805b3d · Iulia Bejan]) and `GetParentIssue` for *sub-issues* ([452f2668 · Svyatoslav Pidgorny]).
Observations
Total output increased by 125% (11 current vs 5 2-month average), grow score by 109% (4 current vs 2 2-month average), and maintenance score by 223% (7 current vs 2 2-month average) compared to the 2-month average, indicating a highly productive period focused on both new features and significant refactoring.
Waste score decreased by 66% (0 current vs 1 2-month average), demonstrating improved code quality and efficiency.
A consistent pattern of *API client refactoring* was observed, including renaming methods for clarity and introducing *pagination iterators* ([b0245f17 · Glenn Lewis], [4a6d2a98 · Glenn Lewis], [aeea0d20 · Glenn Lewis]), and a significant architectural shift to an *options pattern* for the client constructor ([d9f99978 · Steve Hipwell]).
Regular *dependency updates* for `go-github` ([e1d2bd09 · Glenn Lewis], [07663569 · Glenn Lewis], [d9fc4c0f · Glenn Lewis], [da2e1bfe · Glenn Lewis], [144172e2 · Glenn Lewis], [c6609ad6 · Glenn Lewis]) and *linter tools* ([c207b276 · Glenn Lewis], [79d8b330 · Oleksandr Redko]) indicate a strong focus on maintaining a current and robust development environment.
Multiple commits focused on *testing improvements* and *robustness*, such as adding marshal tests for *secret scanning* ([7cafc9ad · Kirtikumar Anandrao Ramchandani]), fixing `httptest` server flakiness ([953382f6 · Glenn Lewis]), and standardizing JSON body assertions with a new helper ([0a16e22e · Dhananjay Mishra]).
Several *breaking changes* were introduced through refactoring, notably the client constructor ([d9f99978 · Steve Hipwell]), app installation method renaming ([c7788f92 · Glenn Lewis]), and issue field value schema alignment ([a5eca738 · Iulia Bejan]), indicating a commitment to improving the API's design and consistency.
Performance11.00 ETV+98%
Commits40 ↗+2.6%
Performance5.56 ETV+32%
Performance4.21 ETV−69%
Performance13.38 ETV+530%
Performance2.12 ETV−67%

Performance over time

ETV stacked by Growth, Maintenance and Fixes — 90-day moving average, normalized to ETV / month.

Average performance per developer

ETV per active developer per month — 30-day moving average.

Active developers over time

Unique developers committing each day — 90-day moving average.

Knowledge concentration

How dependent is this repo on a small number of contributors? Higher top-1 share = higher key-person risk.

Top 1

40.5 %

Top 3

90.5 %

Top 5

100.0 %

Oleksandr Redko owns 40.5 % of commits.

Top contributors

Most impactful commits

Top 20 by ETV in the all-time window.