The BusTub Relational Database Management System (Educational)
C-Rank Grade: B (Solid) - 50/100
External PR Merge Rate: 75%
Response Time: 4d
First Timer Success: 100%
cmu-db/bustub has a recorded first-timer success rate of 100.0%. Repositories ranked B typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in cmu-db/bustub respond to incoming external pull requests in approximately 100.7 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.
The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 49.7 places cmu-db/bustub in the B tier.
The external contributor pull request merge rate for cmu-db/bustub is 75.0%, based on public PR activity from non-core contributors.
cmu-db/bustub does not currently have active "good first issue" tags indexed, but accepts external contributions through standard GitHub issue tracking.
Collaborative maintainer environment in cmu-db/bustub. Reviews community pull requests with focus on project quality.
Discussions in cmu-db/bustub focus heavily on practical implementation feedback, code formatting standards, and issue reproduction details.
Unlinked PRs without issue context and changes that fail automated test suites face the highest review friction.
Average Response Latency
Tracks hours until a maintainer leaves a review, comment, or PR response.
External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
Rate at which developers submitting their first repository PR succeed.
Show contributors that your repository actively reviews and merges external pull requests.
[](https://getmerged.abhishekco.de/cmu-db/bustub?utm_source=github&utm_medium=badge)
Historical health & responsiveness evolution
External PR acceptance
First PR success rate
50% receive response in
90% receive response in
Maintainer review activity heatmap & prime window prediction
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Detected: UTC
Maintainers are most responsive around 14:00 UTC (14:00 UTC in your timezone). Recommended submission window is Monday - Wednesday from 16:00 to 20:00 UTC (16:00 - 20:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~65 hours (94% approval). Large PRs (>500 lines) take ~483 hours (34% approval). Keep your diff compact for rapid review.
No cached good first issues currently tracked for cmu-db/bustub.
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When evaluating whether to contribute to cmu-db/bustub, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.
Currently, maintainers of cmu-db/bustub acknowledge new external contributions in approximately 4 days+. Out of all submitted pull requests from non-core authors in the last 180-day window, 75.0% were successfully merged into the primary branch.
cmu-db/bustub has a recorded first-timer success rate of 100.0%. Repositories ranked Solid typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~4 days+. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.
The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 49.7 places cmu-db/bustub in the Solid tier.
The external pull request merge rate is 75.0%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
cmu-db/bustub does not have open beginner labels indexed currently, but external PRs for bugs and documentation improvements are evaluated via normal issue triage.
All metrics displayed for cmu-db/bustub are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.