GitHub user alamb closed the discussion with a comment: Request: reduce the 
amount of time used on Apache shared runners

I am not sure what automated script is being referred to. I manually 
copy/pasted the output of of a script I ran locally to this discussion earlier 
today to contribute data that is not easily available elsewhere.

I have gotten the message that further comments are not helpful. Thank you for 
bearing with me

>  It's a long time ago that I contributed far more comprehensive scripts for 
> infra tooling here: 
> https://github.com/apache/infrastructure-actions/blob/main/utils/actions-queue-status.py

Thank you -- I was not familiar with that script. I am running it now and look 
forward to seeing the output

> I have not yet seen any work from @alamb on improving their workflows based 
> on my findings and analysis. I am still waiting.

As you have asked several times, here are some:

<details>

Prompt used:
```text
 > I have not yet seen any work from @alamb on improving their workflows based 
 > on my findings and analysis. I am still waiting.

  Please find pRs in arrow or datafusion that reduce CI time that alamb helped 
review, merge or author
```

# CI-time-reducing PRs in apache/arrow-rs and apache/datafusion involving alamb

Merged PRs that reduce CI time where alamb was author, reviewer, merger, or 
commenter.
Compiled 2026-10-23 via GitHub keyword search (CI speed, cache, runner, shard, 
etc.) plus a per-PR check of author, merger, reviewers and commenters. Keyword 
search can miss PRs whose titles don't mention CI, so treat this as a floor.

## apache/arrow-rs

- [#11631](https://github.com/apache/arrow-rs/pull/11631) (2026-10-23, reviewer 
+ merger) — Run Miri on a daily schedule instead of every PR, require before 
releases
- [#10580](https://github.com/apache/arrow-rs/pull/10580) (2026-08-09, 
reviewer) — Speed up Miri workflow
- [#9650](https://github.com/apache/arrow-rs/pull/9650) (2026-06-03, reviewer + 
merger) — Reduce Miri runtime even more
- [#9630](https://github.com/apache/arrow-rs/pull/9630) (2026-04-16, commenter) 
— Use ubuntu-slim runner for lightweight CI jobs
- [#9629](https://github.com/apache/arrow-rs/pull/9629) (2026-04-01, reviewer + 
merger) — Use nextest to run Miri in CI
- [#5982](https://github.com/apache/arrow-rs/pull/5982) (2024-07-01, reviewer + 
merger) — Reduce repo size by removing accumulated commits in a CI job
- [#2933](https://github.com/apache/arrow-rs/pull/2933) (2022-10-27, reviewer) 
— Cleanup CI
- [#2227](https://github.com/apache/arrow-rs/pull/2227) (2022-07-29, author) — 
Only trigger arrow CI on changes to arrow
- [#2214](https://github.com/apache/arrow-rs/pull/2214) (2022-08-04, author + 
merger) — Only run coverage jobs on master
- [#2168](https://github.com/apache/arrow-rs/pull/2168) (2022-07-26, author + 
merger) — Split arrow-specific checks into their own workflows, common CI time 
cut to 21 minutes
- [#2165](https://github.com/apache/arrow-rs/pull/2165) (2022-07-25, author + 
merger) — Break parquet_derive and arrow_flight tests into their own workflows
- [#2151](https://github.com/apache/arrow-rs/pull/2151) (2022-07-24, author) — 
Break out docs CI job into its own action
- [#2150](https://github.com/apache/arrow-rs/pull/2150) (2022-07-23, author) — 
Stop pretending to cache Rust build artifacts, CI about 20% faster

## apache/datafusion

- [#26649](https://github.com/apache/datafusion/pull/26649) (2026-10-23, 
reviewer + merger) — Stop re-running the workspace test suite in the extended 
tests job
- [#26644](https://github.com/apache/datafusion/pull/26644) (2026-10-23, 
reviewer + merger) — Halve extended-test fuzz time by computing the join fuzz 
reference once
- [#26571](https://github.com/apache/datafusion/pull/26571) (2026-10-21, 
commenter) — Move more CI jobs to ubuntu-slim
- [#25591](https://github.com/apache/datafusion/pull/25591) (2026-10-20, 
reviewer) — Run the Rust workflow for fork PRs on the fork, offloading the 
apache runner queue
- [#25443](https://github.com/apache/datafusion/pull/25443) (2026-09-18, 
reviewer + merger) — Skip queue-verified Dev and Dependencies jobs on pushes to 
main
- [#25365](https://github.com/apache/datafusion/pull/25365) (2026-09-17, merger 
+ commenter) — Skip queue-verified Rust jobs on pushes to main
- [#23477](https://github.com/apache/datafusion/pull/23477) (2026-07-13, 
reviewer + merger) — Use install-action instead of cargo install to speed up CI
- [#21227](https://github.com/apache/datafusion/pull/21227) (2026-05-06, 
commenter) — Remove linux-build-lib from extended tests
- [#20972](https://github.com/apache/datafusion/pull/20972) (2026-03-16, 
reviewer) — thin-ci
- [#20274](https://github.com/apache/datafusion/pull/20274) (2026-02-23, 
reviewer) — Runs-on for more actions
- [#20107](https://github.com/apache/datafusion/pull/20107) (2026-02-03, 
reviewer) — Runs-on for linux-build-lib and linux-test, 2x faster CI
- [#16709](https://github.com/apache/datafusion/pull/16709) (2025-07-12, 
reviewer + merger) — Improve CI cache
- [#16451](https://github.com/apache/datafusion/pull/16451) (2025-06-19, 
author) — Remove redundant license-header-check CI job
- [#15966](https://github.com/apache/datafusion/pull/15966) (2025-05-07, 
reviewer) — Removal of duplicate CI jobs
- [#15075](https://github.com/apache/datafusion/pull/15075) (2025-03-14, author 
+ merger) — Split datafusion-cli testing into its own CI job
- [#14745](https://github.com/apache/datafusion/pull/14745) (2025-02-21, 
reviewer) — Free up disk space in the extended-test runner
- [#13045](https://github.com/apache/datafusion/pull/13045) (2024-10-25, author 
+ merger) — Allow using cargo nextest for running tests
- [#9865](https://github.com/apache/datafusion/pull/9865) (2024-03-30, author + 
merger) — Move depcheck out of the datafusion crate, 200 fewer crates to compile
- [#8728](https://github.com/apache/datafusion/pull/8728) (2024-01-06, 
reviewer) — Speed up win64 test
- [#7678](https://github.com/apache/datafusion/pull/7678) (2023-09-29, reviewer 
+ merger) — Improve cache usage in CI
- [#7668](https://github.com/apache/datafusion/pull/7668) (2023-09-28, reviewer 
+ merger) — Migrate datafusion-proto tests into their own binary
- [#6683](https://github.com/apache/datafusion/pull/6683) (2023-06-16, author) 
— Combine three test binaries to reduce CI disk space
- [#5047](https://github.com/apache/datafusion/pull/5047) (2023-01-24, reviewer 
+ merger) — Cleanup CI
- [#2948](https://github.com/apache/datafusion/pull/2948) (2022-07-20, author + 
merger) — Remove CI caching to preserve disk space

37 merged CI-time PRs with alamb involved: 13 authored, 17 merged, the rest 
reviewed or commented on. Nine landed in the last six weeks, including three in 
the past week in datafusion.


</details>



GitHub link: 
https://github.com/apache/airflow/discussions/75395#discussioncomment-19153463

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