Gluten is a middle layer responsible for offloading JVM-based SQL engines' execution to native engines.
C-Rank Grade: A (Welcoming) - 66/100
External PR Merge Rate: 59%
Response Time: -
First Timer Success: 61%
apache/gluten has a recorded first-timer success rate of 60.7%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in apache/gluten respond to incoming external pull requests in approximately 0.0 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 66.1 places apache/gluten in the A tier.
The external contributor pull request merge rate for apache/gluten is 59.3%, based on public PR activity from non-core contributors.
apache/gluten currently has 4 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Highly welcoming maintainers in apache/gluten. Prompt code reviews with positive guidance for new contributors.
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/apache/gluten?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 02:00 UTC (02:00 UTC in your timezone). Recommended submission window is Monday - Wednesday from 06:00 to 10:00 UTC (06:00 - 10:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~16 hours (74% approval). Large PRs (>500 lines) take ~115 hours (27% approval). Keep your diff compact for rapid review.
spark-3.4 is the lowest supported profile, so testWithMinSparkVersion(name, "3.4") is just test(name) with extra indirection. 57 call sites across 14 files, mostly in ScalarFunctionsValidateSuite, DeltaSuite and JsonFunctionsValidateSuite. testWithRangeSparkVersion and ignoreWithSpecifiedSparkVersion in GlutenQueryTest have no callers either. Gates on 3.5 / 4.0 / 4.1 are live and should stay. No behaviour change — the point is that every remaining version gate is then a real one. Best done after #12981. Follow-up to #12807.
Description Migrate important tests to Spark-34+ Remove Spark-33 unit tests Remove Spark-33 shim layer Remove building scripts Gluten version None
Description see discussion #12312 setup Almalinux8 CI image for Gluten, example on centos7 https://github.com/apache/gluten/blob/main/dev/docker/Dockerfile.centos7-gcc13-static-build Migrate to use the new image for x86/arm native lib build: https://github.com/apache/gluten/blob/main/.github/workflows/velox_backend_x86.yml#L71 Gluten version None
Description IBM now provides instances to Apache so Gluten should be able to run with Power Currently the Power team is working with Apache/arrow project to add those instances at apache org level. Once that is done Gluten should be able to use those instances as well. IBM/actionspz#102 Gluten version None
Description write.target-file-size-bytes: facebookincubator/velox#16389 write.parquet.compression-codec: supported write.parquet.compression-level: facebookincubator/velox#16529 write.parquet.row-group-size-bytes: facebookincubator/velox#16998 write.parquet.page-size-bytes: This config "hive.parquet.writer.page-size" exist right now. write.parquet.page-row-limit: facebookincubator/velox#16566 Gluten version None
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When evaluating whether to contribute to apache/gluten, 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 apache/gluten acknowledge new external contributions in approximately -. Out of all submitted pull requests from non-core authors in the last 180-day window, 59.3% were successfully merged into the primary branch.
apache/gluten has a recorded first-timer success rate of 60.7%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~-. 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 66.1 places apache/gluten in the Welcoming tier.
The external pull request merge rate is 59.3%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, apache/gluten currently has 4 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for apache/gluten 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.