This Week in Rust

This Week in Rust 664

TWiR Contributors — Wed, 12 Aug 2026 00:00:00 -0400

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Official

Call for testing: Restricting trait implementability and field mutability

Foundation

Newsletters

This Month in Rust OSDev: July 2026

Project/Tooling Updates

We are making changes to the Project/Tooling Updates Section - see here for more details

Observations/Thoughts

Rust Walkthroughs

Research

Rust Coreutils: Rebuilding Unix Foundations in a Modern Language

Miscellaneous

Crate of the Week

This week's crate is literator, a crate for efficiently displaying the items of an iterator without temporary allocations.

Thanks to Nora for the 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, Cargo, Rustup or Rust language RFCs.

Let us know if you would like your feature to be tracked as a part of this list.

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.

Diesel - Improve the documentation of our derives

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 Bluesky 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.

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 Bluesky or Mastodon!

Updates from the Rust Project

698 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

This week so many new performance improvements landed that we needed to roll 10 of them up together to keep the bors queue manageable, great work! Also new is the LLVM 23 update which caused massive compile-time, run-time, bootstrap time and artifact size improvements. These improvements are reduced by the merge of Polonius Alpha on nightly causing a 3.0% regression. There still seems to be some potential to mitigate this regression.

Triage done by @JonathanBrouwer. Revision range: 65dd30fb..771916f9

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	4.6%	[0.2%, 12.8%]	24
Regressions ❌ (secondary)	4.3%	[0.2%, 14.3%]	30
Improvements ✅ (primary)	-3.3%	[-16.4%, -0.2%]	251
Improvements ✅ (secondary)	-5.2%	[-34.8%, -0.2%]	308
All ❌✅ (primary)	-2.6%	[-16.4%, 12.8%]	275

1 Regression, 4 Improvements, 7 Mixed; 5 of them in rollups 25 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:

Final Comment Period

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

Compiler Team (MCPs only)

Leadership Council

No Items entered Final Comment Period this week for Rust RFCs, Language Reference, Cargo, Language Team 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

RFC: Support External Linkers

Upcoming Events

Rusty Events between 2026-08-12 - 2026-09-09 🦀

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

The AI discussion was already put to bed as off topic and derailing. Do not summon the Mods so carelessly, as they are wroth, and filled with cruel vengeance.

– Simon Buchan on rust-users

Thanks to Jonas Fassbender for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by:

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

This Week in Rust 663

TWiR Contributors — Wed, 05 Aug 2026 00:00:00 -0400

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Official

Newsletters

The Embedded Rustacean Issue #77

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Crate of the Week

This week's crate is index_type, a crate for providing strongly typed indices for collections.

Thanks to Roee Shoshani 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.

No calls for testing were issued this week by Rust, Cargo, Rustup or Rust language RFCs.

Let us know if you would like your feature to be tracked as a part of this list.

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.

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 Bluesky 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.

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 Bluesky or Mastodon!

Updates from the Rust Project

630 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Rustfmt

format cfg_select!

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

A lot of optimizations landed this week. Some big improvements to rustdoc in #159854, one big improvement in control flow graph traversal for cranelift-codegen, few more improvements to next-solver benchmarks and various other micro-optimizations, bringing the total to a nice round number of 10 improvements this week.

Triage done by @panstromek. Revision range: ad0c9dce..65dd30fb

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.3%	[0.2%, 0.5%]	18
Regressions ❌ (secondary)	2.1%	[0.1%, 16.8%]	64
Improvements ✅ (primary)	-3.3%	[-39.8%, -0.2%]	97
Improvements ✅ (secondary)	-6.1%	[-39.6%, -0.1%]	111
All ❌✅ (primary)	-2.7%	[-39.8%, 0.5%]	115

1 Regression, 5 Improvements, 11 Mixed; 6 of them in rollups 32 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:

No RFCs were approved this week.

Final Comment Period

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

Compiler Team (MCPs only)

No Items entered Final Comment Period this week for Rust RFCs,Language Reference, Cargo, Language Team, 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 2026-08-05 - 2026-09-02 🦀

Virtual

2026-08-05 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Operating Systems Book Club: Execution and Scheduling
2026-08-05 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-08-07 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-10 | Hybrid (Kuala Lumpur, Malaysia) | Rust Malaysia Meetup
- Rust Meetup August 2026
2026-08-11 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-08-13 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-08-13 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-08-14 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-18 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-08-19 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Dealing with Dependencies
2026-08-20 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- August, 2026 SRUG (Seattle Rust User Group) Meetup
2026-08-20 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
- Tock OS Part #5 — Wireless Communication with the IEEE 802.15.4 protocol
2026-08-21 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-25 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-08-27 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-08-21 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-09-02 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing

Africa

2026-08-11 | Johannesburg, ZA | Johannesburg Rust Meetup
- Rust's extended standard library

Asia

2026-08-10 | Hybrid (Kuala Lumpur, MY) | Rust Malaysia Meetup
- Rust Meetup August 2026
2026-08-22 | Bangalore, IN | Rust Bangalore
- August 2026 Rustacean Meetup
2026-08-22 | Delhi, IN | Rust Delhi
- Rust Delhi X SciPy India Meetup
2026-08-22 | Noida, IN | SciPy India
- Scientific Computing in Rust and Python
2026-08-29 | Pune, IN | Rust Pune
- Rust Pune Meetup: August 2026

Europe

2026-08-05 | Köln, DE | Rust Cologne
- Rust in August: Don't panic! …or_else?
2026-08-06 | Berlin, DE | Rust Berlin
- Rust Berlin on location 🏳️‍🌈 - Edition 016
2026-08-06 | Oxford, UK | Oxford ACCU/Rust Meetup.
- ACCU/Rust Summer social
2026-08-13 | Switzerland, CH | PostTenebrasLab
- Rust Meetup Geneva
2026-08-18 | Aarhus, DK | Rust Aarhus
- Hack Night: Trust but verify the LLM
2026-08-18 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
- Topic TBD
2026-08-20 | Frankfurt, DE | Rust Rhein-Main
- Building an acoustic camera with egui and embassy
2026-08-27 | Manchester, GB | Rust Manchester
- Rust Manchester August Talks

North America

2026-08-06 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-08-06 | Saint Louis, MO, US | STL Rust
- Shipping Temporal: How a Global Rust Ecosystem Built Chrome’s Newest Web API
2026-08-11 | New York, NY, US | Rust NYC
- Rust NYC: 'An intro to wgpu' and 'Let's Talk Generics!'
2026-08-13 | Lehi, UT, US | Utah Rust
- Utah Rust August Meetup
2026-08-13 | San Diego, CA, US | San Diego Rust
- San Diego Rust August Meetup - Back in person!
2026-08-15 | San Francisco, CA, US | Flower
- BOG-A-THON 3
2026-08-18 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-08-19 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Dealing with Dependencies
2026-08-19 | San Francisco, CA, US | Bay Area Rust
- Bay Area Rust August Meetup
2026-08-20 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- August, 2026 SRUG (Seattle Rust User Group) Meetup
2026-08-26 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-08-26 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA August! Rust in Quantum Computing
2026-08-27 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl

Oceania

2026-08-27 | Melbourne, AU | Rust Melbourne
- Rust Melbourne Meetup

South America

2026-08-08 | São Paulo, SP | Rust-SP
- Rust SP - Aug/2026

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

… but I gave up on the idea as the macro rules were turning into a turing complete rust syntax parser

– Koosha on rust-users

Thanks to miro for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by:

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

This Week in Rust 662

TWiR Contributors — Wed, 29 Jul 2026 00:00:00 -0400

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Newsletters

Scientific Computing in Rust #20 (July 2026)

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

No Tokens Yet Does Not Mean a Rust LLM Stream Is Safe to Retry
[series] Rama 101.2: Core Concepts
[video] [series] What's Inside Axum?

Crate of the Week

This week's crate is cargo-efmt, a drop-in replacement for cargo fmt to support .editorconfig.

Thanks to kleines Filmröllchen 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.

No calls for testing were issued this week by Rust, Cargo, Rustup or Rust language RFCs.

Let us know if you would like your feature to be tracked as a part of this list.

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 Bluesky 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 Bluesky or Mastodon!

Updates from the Rust Project

570 pull requests were merged in the last week

Compiler

Library

Cargo

Rustfmt

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Several large improvements landed in the past week:

rustdoc is on average roughly 16% faster across all of our doc benchmarks:
rustdoc: Only inline impls for local primitives, 7% faster doc builds
rustdoc: Only synthesize auto/blanket impls for documented items, another 7% faster doc builds
rustdoc: Only build extern trait impls if needed, another 10% faster doc builds
Early removal of no-op panic handling in debug builds. This speeds up Cargo by ~4% in cycle count.
Optimize escape_string_symbol() sped up large include_bytes!/include_str! through changes to string escaping, avoiding a regression in upcoming LLVM 23 upgrade.

Great to see so many improvements!

Triage done by @simulacrum. Revision range: d527bc9b..ad0c9dce

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:

No RFCs were approved this week.

Final Comment Period

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

Compiler Team (MCPs only)

Rust RFCs

Cargo

No Items entered Final Comment Period this week for Language Reference, Language Team, 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

RFC: Externref lang item for Wasm targets

Upcoming Events

Rusty Events between 2026-07-29 - 2026-08-26 🦀

Virtual

2026-07-30 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-07-31 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-01 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-08-02 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: First Sunday
2026-08-03 | Virtual (Global) | Rust Maven
- Workshop: Add tests to an open source Rust project
2026-08-04 | Virtual (London, UK) | Women in Rust
- 👋 Community Catch Up
2026-08-04 | Virtual (Tel Aviv-yafo, IL) | Rust 🦀 TLV
- שיחה חופשית ווירטואלית על ראסט
2026-08-05 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Operating Systems Book Club: Execution and Scheduling
2026-08-05 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-08-07 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-11 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-08-13 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-08-13 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-08-14 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-18 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-08-19 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Dealing with Dependencies
2026-08-20 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- August, 2026 SRUG (Seattle Rust User Group) Meetup
2026-08-20 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
- Tock OS Part #5 — Wireless Communication with the IEEE 802.15.4 protocol
2026-08-21 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-25 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday

Africa

2026-08-11 | Johannesburg, ZA | Johannesburg Rust Meetup
- Rust's extended standard library

Asia

2026-08-22 | Bangalore, IN | Rust Bangalore
- August 2026 Rustacean Meetup
2026-08-22 | Delhi, IN | Rust Delhi
- Rust Delhi X SciPy India Meetup
2026-08-22 | Noida, IN | SciPy India
- Scientific Computing in Rust and Python

Europe

2026-07-29 | Poland, PL | Rust Poland
- Rust Poland x Kraków #10
2026-07-30 | Copenhagen, DK | Copenhagen Rust Community
- Rust meetup #70
2026-07-30 | Manchester, UK | Rust Manchester
- Rust Manchester July Code Night
2026-08-06 | Oxford, UK | Oxford ACCU/Rust Meetup.
- ACCU/Rust Summer social
2026-08-18 | Aarhus, DK | Rust Aarhus
- Hack Night: Trust but verify the LLM
2026-08-18 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
- Topic TBD
2026-08-20 | Frankfurt, DE | Rust Rhein-Main
- Building an acoustic camera with egui and embassy

North America

2026-07-30 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-08-01 | Boston, MA, US | Boston Rust Meetup
- Chinatown Rust Lunch, Aug 1
2026-08-04 | Boston, MA, US | Boston Rust Meetup
- Evening Boston Rust Meetup at Red Hat, Aug 4
2026-08-06 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-08-06 | Saint Louis, MO, US | STL Rust
- Shipping Temporal: How a Global Rust Ecosystem Built Chrome’s Newest Web API
2026-08-13 | Lehi, UT, US | Utah Rust
- Utah Rust August Meetup
2026-08-13 | San Diego, CA, US | San Diego Rust
- San Diego Rust August Meetup - Back in person!
2026-08-15 | San Francisco, CA, US | Flower
- BOG-A-THON 3
2026-08-18 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-08-19 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Dealing with Dependencies
2026-08-19 | San Francisco, CA, US | Rust Bay Area
- Rust Bay Area August Meetup
2026-08-20 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- August, 2026 SRUG (Seattle Rust User Group) Meetup
2026-08-26 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground

Oceania

2026-07-30 | Melbourne, AU | Rust Melbourne
- Rust Melbourne July 2026

South America

2026-08-08 | São Paulo, SP | Rust-SP
- Rust SP - Aug/2026

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

So let's talk about what the process has looked like for Netstack3. For 11 months, the team has been ramping up a dogfooding program. At peak, that program has seen about 60 devices running nearly 24/7 in developers' homes.

Again, if this were any other netstack, we would have expected to uncover a giant mountain of bugs in that time. So, over the past year, how many bugs did the team uncover in the field?

Three.

– Josh Liebow-Feeser on his blog

llogiq again has no one to thank for a suggestion, so he is thankful to himself for finding this quote instead.

Please submit quotes and vote for next week!

This Week in Rust is edited by:

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

This Week in Rust 661

TWiR Contributors — Wed, 22 Jul 2026 00:00:00 -0400

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Official

Announcing Rust 1.97.1

Newsletters

The Embedded Rustacean Issue #76

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Crate of the Week

This week's crate is xan, a TUI toolkit to work with CSV files.

Thanks to Simeon H.K. Fitch for the 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.

No calls for testing were issued this week by Rust, Cargo, Rustup or Rust language RFCs.

Let us know if you would like your feature to be tracked as a part of this list.

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 Bluesky 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 Bluesky or Mastodon!

Updates from the Rust Project

576 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

The two most notable changes this week were #159115, which resulted in pretty nice instruction count wins for full incremental builds on several benchmarks, and #159091, which enabled PGO for rustdoc, which makes it ~3-4% faster across the board.

There were two large rollups with tiny performance regressions, which made it difficult to find the offending PRs.

Triage done by @Kobzol. Revision range: 5503df87..d527bc9b

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.4%	[0.2%, 1.0%]	40
Regressions ❌ (secondary)	0.7%	[0.2%, 4.6%]	69
Improvements ✅ (primary)	-2.0%	[-6.2%, -0.2%]	136
Improvements ✅ (secondary)	-2.6%	[-8.4%, -0.2%]	119
All ❌✅ (primary)	-1.4%	[-6.2%, 1.0%]	176

2 Regressions, 3 Improvements, 6 Mixed; 4 of them in rollups 34 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:

No RFCs were approved this week.

Final Comment Period

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

Compiler Team (MCPs only)

Leadership Council

Deallocate post-2026 funds from PM and compiler-ops

Unsafe Code Guidelines

Do the bytes of a pointer have to stay in the same order?

No Items entered Final Comment Period this week for Cargo, Language Reference, Language Team or Rust RFCs.

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

RFC: Refactor the libs team

Upcoming Events

Rusty Events between 2026-07-22 - 2026-08-19 🦀

Virtual

2026-07-24 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-07-28 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-07-28 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-07-30 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-07-31 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-01 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-08-02 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: First Sunday
2026-08-04 | Virtual (London, UK) | Women in Rust
- 👋 Community Catch Up
2026-08-05 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-08-07 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-11 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-08-13 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-08-13 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-08-14 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-08-18 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-08-19 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Dealing with Dependencies

Africa

2026-08-11 | Johannesburg, ZA | Johannesburg Rust Meetup
- Rust's extended standard library

Asia

2026-07-25 | Mumbai, IN | Rust Mumbai
- Rust Mumbai — July Meetup 🦀
2026-07-26 | Pune, IN | Rust Pune
- Rust Pune: July 2026

Europe

2026-07-23 | Berlin, DE | Rust Berlin
- Rust Berlin Talks: The next generation
2026-07-23 | London, UK | Rust London User Group
- LDN Talks: July 2026 Antithesis Takeover
2026-07-23 | London, UK | London Rust Project Group
- Rama modular service framework for Rust
2026-07-23 | Paris, FR | Rust Paris
- Rust meetup #87
2026-07-25 | Stockholm, SE | Stockholm Rust
- Ferris' Fika Forum #28
2026-07-27 | Augsburg, DE | Rust Meetup Augsburg
- Rust Meetup #20: Julian Dickert - Supply chain security in Rust: Evaluating crates for production
2026-07-29 | Poland, PL | Rust Poland
- Rust Poland x Kraków #10
2026-07-30 | Copenhagen, DK | Copenhagen Rust Community
- Rust meetup #70
2026-07-30 | Manchester, UK | Rust Manchester
- Rust Manchester July Code Night
2026-08-18 | Aarhus, DK | Rust Aarhus
- Hack Night: Trust but verify the LLM
2026-08-18 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
- Topic TBD

North America

2026-07-22 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-07-22 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA: Rust in Distributed Systems with Flight Science!
2026-07-22 | New York, NY, US | Rust NYC
- Rust NYC: Write A Custom Coding Agent and wasm_zero
2026-07-23 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-07-25 | Boston, MA, US | Boston Rust Meetup
- Porter Square Rust Lunch, July 25
2026-07-25 | Brooklyn, NY, US | Flower
- BOG-A-THON 2
2026-07-30 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-08-01 | Boston, MA, US | Boston Rust Meetup
- Chinatown Rust Lunch, Aug 1
2026-08-04 | Boston, MA, US | Boston Rust Meetup
- Evening Boston Rust Meetup at Red Hat, Aug 4
2026-08-06 | Saint Louis, MO, US | STL Rust
- Shipping Temporal: How a Global Rust Ecosystem Built Chrome’s Newest Web API
2026-08-13 | Lehi, UT, US | Utah Rust
- Utah Rust August Meetup
2026-08-13 | San Diego, CA, US | San Diego Rust
- San Diego Rust August Meetup - Back in person!
2026-08-15 | San Francisco, CA, US | Flower
- BOG-A-THON 3
2026-08-18 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-08-19 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Dealing with Dependencies

Oceania

2026-07-23 | Perth, AU | Rust Perth Meetup Group
- Rust Perth: July Meetup!
2026-07-30 | Melbourne, AU | Rust Melbourne
- Rust Melbourne July 2026

South America

2026-08-08 | São Paulo, SP | Rust-SP
- Rust SP - Aug/2026

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

We were planning on publishing a blog post announcing this at the same time as making the repo public, but ran out of private repo CI usage 😭.

– Carl Lerche on r/rust about the launch of topcoat

Despite a lamentable lack of suggestions, llogiq is glad to have found this quote.

Please submit quotes and vote for next week!

This Week in Rust is edited by:

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust