databendlabs/databend - Open Source PR Review Scorecard

Data Agent Ready Warehouse : One for Analytics, Search, AI, Python Sandbox. — rebuilt from scratch. Unified architecture on your S3.

C-Rank Grade: A (Welcoming) - 62/100

External PR Merge Rate: 79%

Response Time: 5d

First Timer Success: 79%

Frequently Asked Questions

Is databendlabs/databend welcoming to first-time open-source contributors?

databendlabs/databend has a recorded first-timer success rate of 78.9%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.

How fast can I expect code review feedback on my pull request?

Maintainers in databendlabs/databend respond to incoming external pull requests in approximately 117.6 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.

What does the 61.8 C-Rank™ score (A Tier) represent?

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 61.8 places databendlabs/databend in the A tier.

What is the external contributor pull request merge rate for databendlabs/databend?

The external contributor pull request merge rate for databendlabs/databend is 79.0%, based on public PR activity from non-core contributors.

Are there Good First Issues available in databendlabs/databend?

databendlabs/databend currently has 1 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".

databendlabs
databendlabs/databendAWelcoming9.4k
GitHub
Back to Explorer
databendlabs

databendlabs/databend

9,426
AWelcoming(62/100)Rust

Data Agent Ready Warehouse : One for Analytics, Search, AI, Python Sandbox. — rebuilt from scratch. Unified architecture on your S3.

Compare
Jump to:

AI Maintainer Review Guidelines

Review Persona

High-Friction Gatekeeper

Warmth Score
5.0/10
Patience Score
6.0/10
Nitpick Rate
65%

Rigorous architecture standards (100% critical review signals). Ensure PRs strictly follow guidelines before requesting review in databendlabs/databend.

Top PR Submission Do's

  • Add unit tests with >80% coverage for modified code paths
  • Run repository linter and code formatters locally before pushing
  • Link relevant GitHub issue ID in PR description pre-flight checklist

Top PR Friction Pitfalls (Don'ts)

  • Do not submit unlinked PRs without referencing an existing issue
  • Do not mix refactoring and feature logic into a single commit
  • Do not ping maintainers repeatedly within 24 hours of opening
Response Velocity
4 days+
Standard maintainer review cycle

Average Response Latency

Tracks hours until a maintainer leaves a review, comment, or PR response.

Merge Efficiency
79.0%
High acceptance rate for external PRs

External Acceptance Rate

Percentage of community pull requests successfully merged into main.

First-Timer Success
78.9%
Strong first-timer PR acceptance rate

First PR Conversion

Rate at which developers submitting their first repository PR succeed.

Active Maintainers
19 core
Highly collaborative maintainer core
Diagnostic Health HUD
79.0%
Merge Gauge
78.9%
1st-Timer
Community Vibe55/100

Embed C-Rank Badge

Show contributors that your repository actively reviews and merges external pull requests.

GetMerged C-Rank badge for databendlabs/databend
[![GetMerged C-Rank](https://getmerged.abhishekco.de/api/badge/databendlabs/databend)](https://getmerged.abhishekco.de/databendlabs/databend?utm_source=github&utm_medium=badge)

Active Good First Issues (1)

View on GitHub

Summary RoaringFormatSpec describes the serialization specification for RoaringBitmap, which may allow for direct computation by using serialized bytes, avoiding deserialization. ref: https://github.com/RoaringBitmap/RoaringFormatSpec/?tab=readme-ov-file#general-layout

📅 Opened Dec 14, 2025💬 9 comments
Quality: 55/100Contribute
Looking for more Rust beginner tasks?Explore Rust GFI

Contributor Community Vibe Feedback

Rate what actually matters after opening a pull request here.

Have you contributed to this repo?

Rate your first-hand PR experience (review speed, maintainer responsiveness, and onboarding ease) to help other contributors.

3 ratings required
Maintainer helpfulness
Review speed
Beginner friendliness

Contributor Compatibility & Review Speed Analysis for databendlabs/databend

When evaluating whether to contribute to databendlabs/databend, 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 databendlabs/databend acknowledge new external contributions in approximately 4 days+. Out of all submitted pull requests from non-core authors in the last 180-day window, 79.0% were successfully merged into the primary branch.

Frequently Asked Questions - Contributing to databendlabs/databend

01

Is databendlabs/databend welcoming to first-time open-source contributors?

databendlabs/databend has a recorded first-timer success rate of 78.9%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.

02

How fast can I expect code review feedback on my pull request?

The initial maintainer response time averages ~4 days+. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.

03

What does the 61.8 C-Rank™ score represent?

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 61.8 places databendlabs/databend in the Welcoming tier.

04

What is the external contributor pull request merge rate for databendlabs/databend?

The external pull request merge rate is 79.0%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.

05

Are there beginner Good First Issues open in databendlabs/databend?

Yes, databendlabs/databend currently has 1 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.

GetMerged C-Rank™ Indexing Standard

All metrics displayed for databendlabs/databend 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.