apache/datafusion
What happens to a stranger's pull request here, in the Porchlamp snapshot of 14 October 2026.
Outside pull requests to datafusion got a first human reply in a median of 14.1 hours (249 pull requests, 11 April to 8 October 2026); 33% got none within 14 days. It ranks 29 of 3,833 overall and 65 of 1,968 for first-time contributors.
Rating
- Score: 73.91
- Coverage: 81% · Ceiling A
- Tier: A (capped)
- Quadrant: Sweet Spot
- Ecosystem: crates.io (Rust)
Capped: this tier can go no higher until more of the project's inputs are measured. It reflects how much data there is, not how good the score is.
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 70.2 | 55% |
| Criticality | 69.8 | 100% |
| Governance | 73.3 | 100% |
| Rigor | 78.8 | 100% |
| Accessibility | 82.9 | 50% |
Rank in each lens
| Lens | Standing |
|---|---|
| Balanced | Rank 29 of 3,833 |
| First-timer | Rank 65 of 1,968 |
| Career capital | Rank 22 of 823 |
| Senior systems | Rank 24 of 1,206 |
| AI-assisted | Rank 18 of 3,929 |
The measured parameters
| Parameter | Value | Count | Window | What it measures |
|---|---|---|---|---|
| Time to First Response | 14.0719 | 249 | 11 April to 8 October 2026 | Median hours from an outside pull request opening to its first substantive human reply. |
| Decision Rate (90d) | Not shown: Insufficient sample size | — | — | Share of outside pull requests that were merged or closed within 90 days. |
| First-timer Merge Rate | Not shown: Insufficient sample size | — | — | Share of first-time outside authors' decided pull requests that were merged. |
| PR Ghost Rate (14d) | 0.3274 | 168 | 16 April to 13 October 2026 | Share of outside pull requests with no maintainer response, merge or close within 14 days. |
| Time to Merge (p90) | 210.4822 | 193 | 11 April to 8 October 2026 | Hours within which 90% of merged outside pull requests were merged. |
| Dependents | 86 | — | — | Packages in the registry that depend on this project, counted once each. |
| OpenSSF Criticality | 0.5859 | — | — | OpenSSF criticality score from 0 to 1, computed from the project's public activity signals. |
| Monthly Downloads | 2053845 | — | — | Downloads from the package registry in a month. |
| Legal IP Regime | FOUNDATION_CLA | — | — | The contributor licence regime: DCO, none, a foundation CLA or a corporate CLA. |
| Elephant Factor | 17 | 929 | — | The fewest organisations that account for half of the last year's commits. |
| Promotion Ladder | AD_HOC | — | — | How openly a contributor can become a maintainer, from closed to verified. |
| Pipeline Defenses | 80 | 225 | — | How well the project's build and review pipeline defends against bad changes, 0 to 100. |
| AI Policy Posture | REGULATED | — | — | Whether the project has a written policy on AI-assisted contributions. |
| Substantive Review Rate | 0.4868 | 228 | 11 April to 8 October 2026 | Share of decided pull requests that received a substantive review. |
| Newcomer Issue Supply | 10 | — | — | Open, unassigned, up-to-date issues marked for newcomers. |
| Newcomer Conversion | Not shown: Insufficient sample size | — | — | Share of first-time authors whose first pull request merged within 180 days. |
| Newcomer Return Rate | Not shown: Insufficient sample size | — | — | Share of those merged first-time authors who sent a second pull request within 90 days. |
| Developer Experience | 43 | 11 | — | Developer experience, 0 to 100: half CI run time, half setup signals. |
Similar projects
The ranked projects nearest this one in the same ecosystem.
- biomejs/biome (rank 19)
- rust-lang/cc-rs (rank 23)
- diesel-rs/diesel (rank 34)
- apache/arrow-rs (rank 38)
- tokio-rs/tokio (rank 42)
Evidence
- Snapshot 2026-10-14, data as of 13 October 2026.
- Record hash:
85da5e36ba69d5896978a70b959b88bb98c5f37855eec2504409907657303e5f - The full record is in data/2026-10-14/repos/6c.json, under the key
apache/datafusion. - How every number is measured: Porchlamp methodology.
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