This Week in Rust 614

Hello and welcome to another issue of This Week in Rust! Rust is a programming language empowering everyone to build reliable and efficient software. This is a weekly summary of its progress and community. Want something mentioned? Tag us at @thisweekinrust.bsky.social on Bluesky or @ThisWeekinRust on mastodon.social, or send us a pull request. Want to get involved? We love contributions.

This Week in Rust is openly developed on GitHub and archives can be viewed at [this-week-in-rust.org]…

This Week in Rust is openly developed on GitHub and archives can be viewed at this-week-in-rust.org. If you find any errors in this week’s issue, please submit a PR.

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Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

GreptimeDB Rust Client - A Comprehensive Guide to High-Throughput Bulk Stream Inserts

Crate of the Week

This week’s crate is web-route, a library to ergonomically define and manage web server routes in Rust.

Thanks to sidrubs for the self-suggestion!

Please submit your suggestions and votes for next week!

Calls for Testing

An important step for RFC implementation is for people to experiment with the implementation and give feedback, especially before stabilization.

If you are a feature implementer and would like your RFC to appear in this list, add a call-for-testing label to your RFC along with a comment providing testing instructions and/or guidance on which aspect(s) of the feature need testing.

No calls for testing were issued this week by Rust, Rust language RFCs, Cargo or Rustup. Let us know if you would like your feature to be tracked as a part of this list.

RFCs

Rust

Rustup

If you are a feature implementer and would like your RFC to appear on the above list, add the new call-for-testing label to your RFC along with a comment providing testing instructions and/or guidance on which aspect(s) of the feature need testing.

Call for Participation; projects and speakers

CFP - Projects

Always wanted to contribute to open-source projects but did not know where to start? Every week we highlight some tasks from the Rust community for you to pick and get started!

Some of these tasks may also have mentors available, visit the task page for more information.

greptimedb - Add date and timestamp format to COPY TO (CSV, JSON)
greptimedb - Add compression options to COPY TO
greptimedb - Currently KILL cannot terminate queries like INSERT INTO SELECT If you are a Rust project owner and are looking for contributors, please submit tasks here or through a PR to TWiR or by reaching out on X (formerly Twitter) or Mastodon!

CFP - Events

Are you a new or experienced speaker looking for a place to share something cool? This section highlights events that are being planned and are accepting submissions to join their event as a speaker.

No Calls for papers or presentations were submitted this week.

If you are an event organizer hoping to expand the reach of your event, please submit a link to the website through a PR to TWiR or by reaching out on X (formerly Twitter) or Mastodon!

Updates from the Rust Project

553 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Lot of regressions this week, mostly in rustdoc benchmarks from newly added features. The rest of the suite saw mostly small regressions in small benchmarks and also some improvements, notably from token tree parsing optimization in macro code, span optimization and ongoing work on new solver, which is not fully enabled, yet.

Triage done by @panstromek. Revision range: 239e8b1b..ee361e8f

Summary:

(instructions:u)	mean	range	count
Regressions ❌
(primary)	3.7%	[0.3%, 34.5%]	42
Regressions ❌
(secondary)	2.3%	[0.0%, 53.3%]	79
Improvements ✅
(primary)	-0.5%	[-0.7%, -0.3%]	9
Improvements ✅
(secondary)	-0.9%	[-2.8%, -0.0%]	30
All ❌✅ (primary)	3.0%	[-0.7%, 34.5%]	51

5 Regressions, 1 Improvement, 7 Mixed; 6 of them in rollups 38 artifact comparisons made in total

Full report here

Approved RFCs

Changes to Rust follow the Rust RFC (request for comments) process. These are the RFCs that were approved for implementation this week:

RFC: Promote aarch64-pc-windows-msvc to Tier 1 Every week, the team announces the ‘final comment period’ for RFCs and key PRs which are reaching a decision. Express your opinions now.

Tracking Issues & PRs

Rust

Tracking Issue for NUL-terminated file names with #[track_caller]
style-guide: Document absence of trailing whitespace
Partial-stabilize the basics from bigint_helper_methods No Items entered Final Comment Period this week for Rust RFCs, Cargo, Language Team, Language Reference or Unsafe Code Guidelines.

Let us know if you would like your PRs, Tracking Issues or RFCs to be tracked as a part of this list.

New and Updated RFCs

[new] Supertrait Auto-impl
[new] RFC: Autogenerated Attribute

Upcoming Events

Rusty Events between 2025-08-27 - 2025-09-24 🦀

Oceania

2025-08-27 - 2025-08-30 | Wellington, NZ | Rust Forge
Rust Forge If you are running a Rust event please add it to the calendar to get it mentioned here. Please remember to add a link to the event too. Email the Rust Community Team for access.

Jobs

Please see the latest Who’s Hiring thread on r/rust

Quote of the Week

I clone() everything now. The Borrow Checker permits this small rebellion, this inefficiency. It knows I suffer more knowing my code is not idiomatic. Every .clone() is a confession of my failure. Every Arc<Mutex> a monument to my inadequacy.

– /u/TheEldenLorrdd on /r/rust

Thanks to Colin Terry for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, U007D, joelmarcey, mariannegoldin, bennyvasquez, bdillo

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