mozilla/sccache
What happens to a stranger's pull request here, in the Porchlamp snapshot of 17 October 2026.
Outside pull requests to mozilla/sccache got a first human reply in a median of 29.9 hours (70 pull requests, 18 April to 15 October 2026); 39% got none within 14 days. It ranks 1,117 of 3,219 overall. For first-time contributors it ranks 818 of 1,525 (the bottom 47%).
| Rank | 1,117 of 3,219 |
|---|---|
| Score | 54.34 |
| Tier | C |
| Median first reply | 29.9 hours |
| 14-day no-reply share | 39% |
| First-timer rank | 818 of 1,525 |
| Ecosystem | Rust |
| Window | 18 April to 15 October 2026 |
Composite
- Rank
- 1,117 of 3,219
- Score
- 54.34
- Tier
- C
- Coverage
- 100% · Full
- Quadrant
- Sweet Spot
Coordinates: leverage 51.0 (coverage 100%), friction 39.8 (coverage 100%)
Five pillars
| Pillar | Score | Coverage |
|---|---|---|
| Responsiveness | 54.0 | 100% |
| Criticality | 30.3 | 100% |
| Governance | 76.8 | 100% |
| Rigor | 68.4 | 100% |
| Accessibility | 51.1 | 100% |
The measured parameters
Responsiveness
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Decision Rate (90d)Share of outside pull requests that were merged or closed within 90 days. | 45.7% | 57.1 | 46 | 18 April to 17 July 2026 | primaryraw/pr_window/mozilla__sccache.json |
| PR Ghost Rate (14d)Share of outside pull requests with no maintainer response, merge or close within 14 days. | 39.4% | 21.2 | 104 | 20 April to 17 October 2026 | primaryraw/pr_window/mozilla__sccache.json |
| First-timer Merge RateShare of first-time outside authors' decided pull requests that were merged. | 60.0% | 75.0 | 25 | — | primaryraw/author_history/mozilla__sccache.json |
| Time to First ResponseMedian hours from an outside pull request opening to its first substantive human reply. | 29.9 hours (1.2 days) | 67.1 | 70 | 18 April to 15 October 2026 | primaryraw/pr_window/mozilla__sccache.json |
| Time to Merge (p90)Hours within which 90% of merged outside pull requests were merged. | 916.6 hours (38.2 days) | 14.3 | 64 | 18 April to 15 October 2026 | primaryraw/pr_window/mozilla__sccache.json |
Criticality
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| DependentsPackages in the registry that depend on this project, counted once each. | 1 | 36.4 | — | — | primaryraw/dependents/mozilla__sccache.json |
| Monthly DownloadsDownloads from the package registry in a month. | 20 downloads a month | 4.1 | — | — | primaryraw/downloads/crates__sccache.json |
| OpenSSF CriticalityOpenSSF criticality score from 0 to 1, computed from the project's public activity signals. | 0.4202 | 42.0 | — | — | primaryraw/github_meta/mozilla__sccache.json |
Governance
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Elephant FactorThe fewest organisations that account for half of the last year's commits. | 7 | 100.0 | 255 | — | primaryraw/commits_365d/mozilla__sccache.json |
| Legal IP RegimeThe contributor licence regime: DCO, none, a foundation CLA or a corporate CLA. | No CLA or sign-off found | 85.0 | — | — | primaryraw/governance/mozilla__sccache.json |
| Promotion LadderHow openly a contributor can become a maintainer, from closed to verified. | No written path to becoming a maintainer | 40.0 | — | — | primaryraw/governance/mozilla__sccache.json |
Rigor
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| AI Policy PostureWhether the project has a written policy on AI-assisted contributions. | Written AI policy | 95.0 | — | — | primaryraw/governance/mozilla__sccache.json |
| Pipeline DefensesHow well the project's build and review pipeline defends against bad changes, 0 to 100. | 70 | 70.0 | — | — | primaryraw/scorecard/mozilla__sccache.json |
| Substantive Review RateShare of decided pull requests that received a substantive review. | 31.7% | 39.6 | 82 | 18 April to 15 October 2026 | primaryraw/pr_window/mozilla__sccache.json |
Accessibility
| Parameter | Value | Score | Count | Window | Source |
|---|---|---|---|---|---|
| Developer ExperienceDeveloper experience, 0 to 100: half CI run time, half setup signals. | 85 | 85.0 | 24 | — | primaryraw/actions_runs/mozilla__sccache.json |
| Newcomer ConversionShare of first-time authors whose first pull request merged within 180 days. | 57.1% | 100.0 | 14 | — | primaryraw/author_history/mozilla__sccache.json |
| Newcomer Issue SupplyOpen, unassigned, up-to-date issues marked for newcomers. | 0 | 0.0 | — | — | primaryraw/gfi/mozilla__sccache.json |
| Newcomer Return RateShare of those merged first-time authors who sent a second pull request within 90 days. | 11.1% | 22.2 | 9 | — | primaryraw/author_history/mozilla__sccache.json |
Persona view
| Persona | Rank | Score | Tier | Status |
|---|---|---|---|---|
| Balanced | 1,117 of 3,219 | 54.34 | C | Rated |
| First-timer | 818 of 1,525 | 55.60 | B | Rated |
| Career capital | This repository's production-criticality signal is not yet high enough for career-capital ranking. | |||
| Senior systems | 645 of 1,276 | 54.12 | C | Rated |
| AI-assisted | 876 of 3,696 | 57.42 | B | Rated |
Integrity
- Snapshot
- 2026-10-17
- Raw hash
- ac45ccd2cbb6c1a91060a0165755963eb7e5d2beb06b636fa96e55316ca6bef1
No suspicion flags on this repository.
The full record is in data/2026-10-17/repos/a6.json, under the key mozilla/sccache.
How every number is measured: Porchlamp methodology.
Open an issue about this record and say what looks wrong.
Porchlamp (2026). mozilla/sccache. Snapshot 2026-10-17. https://porchlamp.org/projects/mozilla/sccache/. CC BY 4.0.
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