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. If you find any errors in this week’s issue, please submit a PR.

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Official

• Crossing the streams: Project + Foundation
• Rust compiler performance survey 2025 results

Newsletters

• This Month in Rust OSDev: August 2025

Project/Tooling Updates

• Rust Automod VSCode Extension - Automates creation and management of mod.rs files
• Now available: Rust SDK for Google Cloud

Observations/Thoughts

• Protecting Rust against supply chain attacks
• The unreasonable effectiveness of modern sort algorithms
• Improving state machine code generation
• [video] How Rust won: the quest for performant, reliable software
• [video] Rust for Everyone!

Rust Walkthroughs

• Axum Backend Series - Introduction

Miscellaneous

• 🦀 RustConf Like No Other: a recap of RustConf 2025

Crate of the Week

This week’s crate is GrimoireCSS, a CSS engine crafted in Rust, focusing on unmatched flexibility, reusable dynamic styling, and optimized performance for every environment.

Thanks to Dmitrii Shatokhin 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.

No Calls for participation were submitted this week.

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

390 pull requests were merged in the last week

Compiler

• fix drop scope for super let bindings within if let
• stabilize c-style varargs for sysv64, win64, efiapi, aapcs

Library

• add exact bitshifts
• constify impl Try for ControlFlow
• fix path str eq
• single buffer for exponent fmt of integers
• stabilize path_add_extension
• implement WASIp2-specific stdio routines
• start supporting WASIp2 natively

Cargo

• optimize Cargo with LTO
• fix(manifest): Report script manifest errors for the right line number
• fix: switch from –nocapture to –no-capture
• render individual compilation sections in –timings pipeline graph

Rustdoc

• search: skip loading unneeded fnData
• search: yet another stringdex optimization attempt

Clippy

• let_unit_with_type_underscore: make early-pass
• ptr_cast_constness: avoid suggesting unresolvable method call
• fix never_loop forget to remove break in nested loop
• fix read_zero_byte_vec suggests wrongly inside let stmt
• preserve unsafe blocks in option_map_unit suggestion

Rust-Analyzer

• support navigation on primitives
• add else keyword completion after let statements
• make sense of the mess that were (are) different kind of generics in the solver
• improve make::struct_ field_list whitespace
• remove support for register_attr

Rust Compiler Performance Triage

Overall, a fairly neutral week with relatively few changes affecting performance landing.

Triage done by @simulacrum. Revision range: 75ee9ffd..f13ef0d7

1 Regression, 5 Improvements, 3 Mixed; 4 of them in rollups 33 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:

• propose 2025h2 Goals 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 AVX512_FP16 intrinsics
• Tracking Issue for NUL-terminated file names with #[track_caller]
• Stabilize new_zeroed_alloc No Items entered Final Comment Period this week for Rust RFCs, Cargo, Language Team, Language Reference, Leadership Council 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

• No New or Updated RFCs were created this week.

Upcoming Events

Rusty Events between 2025-09-10 - 2025-10-08 🦀

Virtual

• 2025-09-11 | Virtual (Berlin, DE) | Rust Berlin
• Rust Hack and Learn
• 2025-09-11 | Virtual (San Diego, CA, US) | San Diego Rust
• San Diego Rust September 2025 Online Meetup
• 2025-09-14 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
• Rust Readers Discord Discussion: Rust Atomics and Locks
• 2025-09-15 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
• Setup Tock OS in a virtual environment (online) - prep for Sep 17
• 2025-09-16 | Virtual (Washington, DC, US) | Rust DC
• Mid-month Rustful
• 2025-09-17 | Virtual (Vancouver, BC, CA) | Vancouver Rust
• Rust Study/Hack/Hang-out
• 2025-09-18 | Virtual (Nürnberg, DE) | Rust Nuremberg
• Rust Nürnberg online
• 2025-09-23 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
• Fourth Tuesday
• 2025-09-25 | Virtual (Berlin, DE) | Rust Berlin
• Rust Hack and Learn
• 2025-10-01 | Virtual (Indianapolis, IN, US) | Indy Rust
• Indy.rs - with Social Distancing

Asia

• 2025-09-13 | Hangzhou, CN | WebAssembly and Rust Meetup (Wasm Empowering AI)
• GOSIM AI Hangzhou 2025 (CFP is still open)
• 2025-09-13 - 2025-09-14 | Hangzhou, CN | GOSIM
• GOSIM Hangzhou 2025
• 2025-09-17 | Tel Aviv-yafo, IL | Rust 🦀 TLV
• In person Rust September 2025 at Varonis in Herzeliya
• 2025-10-02 | Seoul, KR | Seoul Rust (Programming Language) Meetup
• Seoul Rust Meetup

Europe

• 2025-09-10 | Köln, DE | Rust Cologne
• Rust in September: Atomic Rust
• 2025-09-10 | Reading, UK | Reading Rust Workshop
• Reading Rust Meetup
• 2025-09-11 | Bern, CH | Rust Bern
• 2025 Rust Talks Bern #4 @Zühlke
• 2025-09-16 - 2025-09-18 | Berlin, DE | Oxidize Conference
• Oxidize Conference
• 2025-09-16 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
• Topic TBD
• 2025-09-17 | Girona, ES | Rust Girona | Silicon Girona
• Rust Girona Hack & Learn 09 2025
• 2025-09-18 | Aarhus, DK | Rust Aarhus
• Talk Night at Mjølner Informatics
• 2025-09-23 | Paris, FR | Rust Paris
• Rust meetup #78
• 2025-09-24 | Göteborg, SE | Rust Göteborg
• Rust Gbg — September 2025
• 2025-09-24 | München, DE | Rust Munich
• Rust Munich 2025 / 3 - hybrid
• 2025-09-25 | Augsburg, DE | Rust Augsburg
• Augsburg Rust Meetup #15
• 2025-10-01 | Olomouc, CZ | Rust Moravia
• 4. Rust Moravia Meetup (In the capital!)
• 2025-10-02 | Oslo, NO | Rust Oslo
• Rust Hack’n’Learn at Kampen Bistro
• 2025-10-08 | Paris, FR | Rust Paris
• Rust meetup #79
• 2025-10-08 | Reading, UK | Reading Rust Workshop
• Reading Rust Meetup

North America

• 2025-09-10 | Phoenix, AZ, US | Desert Rust
• Rust <> JS
• 2025-09-11 | Chicago, IL, US | Chicago Rust Meetup
• Rust Happy Hour
• 2025-09-11 | Lehi, UT, US | Utah Rust
• Mazes and Graphs in Rust
• 2025-09-11 | México City, MX | Rust MX
• Polars para análisis y manipulación de datos
• 2025-09-14 | Boston, MA, US | Boston Rust Meetup
• Davis Square Rust Lunch, Sep 14
• 2025-09-16 | San Francisco, CA, US | San Francisco Rust Study Group
• Rust Hacking in Person
• 2025-09-16 | San Francisco, CA, US | Vara Network
• Rust Workshop by Vara Network
• 2025-09-18 | Nashville, TN, US | Music City Rust Developers
• Rust on Bare Metal Series 3 : Place Holder
• 2025-09-18 | Seattle, WA, US | Seattle Rust User Group
• September, 2025 SRUG (Seattle Rust User Group) Meetup
• 2025-09-24 | Austin, TX, US | Rust ATX
• Rust Lunch - Fareground
• 2025-09-24 | Charlottesville, VA, US | Charlottesville Rust Meetup
• Tick, Tock, talk—find out how Rust secures embedded devices
• 2025-09-25 | Atlanta, GA, US | Rust Atlanta
• Rust-Atl At Manuels Tavern
• 2025-10-02 | Saint Louis, MO, US | STL Rust
• 🚁 Rust in Flight: Lessons from Designing a 3D‑Printed Quadcopter with Embedded

Oceania:

• 2025-10-01 | Perth, WA, AU | Rust Perth Meetup Group
• October Meetup 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

Hello,

We are sorry you aren’t happy with the state of the async in the current edition of Rust. The memory ownership intuition you were meant to develop when working with single-threaded and/or parallel execution turned to be too expensive to port into our zero-cost concurrency framework, reinvented from scratch for the ultimate benefit to no one in particular.

We aren’t planning to do anything about it.

Rust Async Support - International Department

– 00100011 on rust-users

Thanks to Aleksander Krauze 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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Discuss on r/rust