This Week in Rust

This Week in Rust 646

TWiR Contributors — Wed, 08 Apr 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

Foundation

Newsletters

This Month in Rust OSDev: March 2026

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

[video] Rust/C++ Interop Challenges - Victor Ciura - CppCon 2025

Crate of the Week

This week's crate is aimdb-core, a type-safe and platform-agnostic data pipeline where the Rust type system is the schema and trait implementations define its behavior.

Thanks to sounds.like.lx 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, 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.

Wild Almonds — Shared Audio Player library for flutter and Tauri

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.

NDC Techtown | CFP open until 2026-04-14 | Kongsberg, Norway | 2026-09-09 - 2026-09-12.
EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17

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

479 pull requests were merged in the last week

Compiler

Library

Cargo

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

A shorter week than normal (probably due to later perf triage last week). Overall fairly small changes scattered across various PRs, though the net effect was slightly positive (-0.5% avg change). All changed ended up either mixed or improvements this week.

Triage done by @simulacrum. Revision range: cf7da0b7..e73c56ab

0 Regressions, 3 Improvements, 8 Mixed; 5 of them in rollups 26 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

Cargo

No Cargo Tracking Issues or PRs entered Final Comment Period this week.

Compiler Team (MCPs only)

cargo clean: Add target directory validation

No Items entered Final Comment Period this week for Rust RFCs, 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

Upcoming Events

Rusty Events between 2026-04-08 - 2026-05-06 🦀

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

Rust tried to have polymorphic generics in the early pre-1.0 days, and they quite reasonably gave up because it was too much work. For real Swift, great fucking working for getting all of this to work!

– Aria Desires on her blog

llogiq thanks himself 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 645

TWiR Contributors — Wed, 01 Apr 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

Foundation

Rust Foundation Joins Datadog’s Open Source Program

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Crate of the Week

This week's crate is tsastat, a high-resolution Thread State Analysis (TSA) tool for Linux.

Thanks to Ankur Rathore 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.

NDC Techtown | CFP open until 2024-04-14 | Kongsberg, Norway | 2024-09-09 - 2026-09-12.
EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17

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

487 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

rustdoc rejects html emits with json output

Rustfmt

prevent panic when rewritng associated item delegations

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

We had some infrastructure troubles this week which prevented some rollup PRs from generating their "unrolled" builds, which made rollup regression investigation more complicated, although we were able to locate and revert the largest rollup regressions in the end. #154304 brought some nice improvements by optimizing the query system.

Triage done by @kobzol. Revision range: 6f22f613..cf7da0b7

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.4%	[0.1%, 1.2%]	4
Regressions ❌ (secondary)	0.3%	[0.1%, 0.5%]	12
Improvements ✅ (primary)	-0.8%	[-6.2%, -0.2%]	58
Improvements ✅ (secondary)	-0.4%	[-1.9%, -0.1%]	28
All ❌✅ (primary)	-0.8%	[-6.2%, 1.2%]	62

3 Regressions, 4 Improvements, 2 Mixed; 2 of them in rollups 35 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

Rust RFCs

build-std: always

No Items entered Final Comment Period this week for Cargo, Compiler Team (MCPs only), 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

Upcoming Events

Rusty Events between 2026-04-01 - 2026-04-29 🦀

Virtual

2026-03-26 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-03-31 | Virtual (Tel Aviv-yafo, IL) | Code Mavens 🦀 - 🐍 - 🐪
- Web development using axum in Rust - part 1
2026-04-01 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-04-01 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-04-02 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-04-04 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-04-05 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: First Sunday
2026-04-07 | Virtual (Tel Aviv-yafo, IL) | Code Mavens 🦀 - 🐍 - 🐪
- Web development using axum in Rust - part 2
2026-04-09 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-04-14 | Virtual (Tel Aviv-yafo, IL) | Code Mavens 🦀 - 🐍 - 🐪
- Web development using axum in Rust - part 3
2026-04-14 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-04-14 | Virtual (London, UK) | Women in Rust
- 👋 Community Catch Up
2026-04-15 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-04-15 | Virtual (Vancouver, BC, CA) | Vancouver Rust
- Nushell
2026-04-16 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- April, 2026 SRUG (Seattle Rust User Group) Meetup
2026-04-19 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: Third Sunday
2026-04-21 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-04-22 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-04-23 | Virtual (Amsterdam, NL) | Bevy Game Development
- Bevy Meetup #13
2026-04-23 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-04-28 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-04-28 | Virtual (London, UK) | Women in Rust
- Lunch & Learn: From Protobuf to Production - A Guide to gRPC in Rust
2026-04-29 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session

Asia

2026-04-11 | Bangalore, IN | Rust Bangalore
- April 2026/Pre-Conference Rustacean meetup
2026-04-17 | Bangalore, IN | Rust India
- Rust India Workshop
2026-04-18 | Bangalore, IN | Rust India
- Rust India Conference

Europe

2026-04-01 | Berlin, DE | Rust Berlin
- Rust Berlin Talks: The next generation
2026-04-01 | Edinburgh, UK | Rust and Friends
- Rust and Friends (evening pub)
2026-04-01 | Köln, DE | Rust Cologne
- Rust in April: From Zero to Rust
2026-04-01 | Oxford, UK | Oxford ACCU/Rust Meetup.
- It came from another dimension!
2026-04-02 | London, UK | Rust London User Group
- LDN Talks Spring Community Showcase
2026-04-02 | Toulouse, FR | Rust Toulouse
- Rust Toulouse Meetup - Release, Servers & Ray Tracing Demystified
2026-04-03 | Edinburgh, UK | Rust and Friends
- Rust and Friends (daytime coffee)
2026-04-07 | Basel, CH | Rust Basel
- Rust Meetup #15 @ letsboot
2026-04-07 | Frankfurt, DE | Rust Rhein-Main
- Building a drone from scratch with Rust (and some hardware)
2026-04-08 | Virtual (Girona, ES) | Rust Girona
- Rust Girona Hack & Learn 04 2026
2026-04-09 | Geneva, CH | Rust Meetup Geneva
- Rust Meetup Geneva
2026-04-09 | Oslo, NO | Rust Oslo
- Rust talks @ AutoStore – "Patterns for Event Driven Systems" and "Rust + WASM"
2026-04-21 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
- Native GUIs with Rust
2026-04-23 | Aarhus, DK | Rust Aarhus
- Talk Night and Birthday Party at MFT Energy

North America

2026-04-02 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-04-02 | Saint Louis, MO, US | STL Rust
- SIUE Cruft Crawler with LLM
2026-04-04 | Boston, MA, US | Boston Rust Meetup
- Winter Hill Rust Lunch, Apr 4
2026-04-07 | New York, NY, US | Rust NYC
- Rust NYC: The Open Source Special
2026-04-09 | Chicago, IL, US | Chicago Rust Meetup
- Rust Happy Hour
2026-04-09 | San Diego, CA, US | San Diego Rust
- San Diego Rust April Meetup - Back in person!
2026-04-11 | Boston, MA, US | Boston Rust Meetup
- Brookline Rust Lunch, Apr 11
2026-04-14 | Charlottesville, VA, US | Charlottesville Rust Meetup
- Sharpening Your Rust Skills for Job Interviews
2026-04-15 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Nushell
2026-04-16 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- April, 2026 SRUG (Seattle Rust User Group) Meetup
2026-04-18 | Boston, MA, US | Boston Rust Meetup
- Harvard Square Rust Lunch, Apr 18
2026-04-20 - 2026-04-22 | Portland, OR | Tokio
- TokioConf 2026
2026-04-21 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-04-22 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-04-23 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA April!
2026-04-25 | Boston, MA, US | Boston Rust Meetup
- South Station Rust Lunch, Apr 25

Oceania

2026-04-09 | Brisbane City, QL, AU | Rust Brisbane
- Rust Brisbane Apr 2026

South America

2026-04-11 | Buenos Aires, AR | Oxidar Org
- Oxidar.org Hackaton - Snakear - ¡Veni a hackear con Rust!
2026-04-17 | Rio de Janeiro, BR | Meetups Rust RJ
- Meetup Rust RJ

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

When you do cursed things, problems find you.

– Folkert de Vries on the trifecta tech blog

We have gone four weeks bare of suggestions for quotes. llogiq is still fine with his choice, but he'd be much more happy if any of you would help him in his search.

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 644

TWiR Contributors — Wed, 25 Mar 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

Foundation

Canonical Joins the Rust Foundation as a Gold Member

Newsletters

Scientific Computing in Rust #16 (March 2026)

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Crate of the Week

This week's crate is noq, a general purpose implementation of the QUIC transport protocol in pure rust.

Thanks to Brendan O'Brien 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.

EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17
NDC Techtown 2026 | CFP open until 2026-05-03 | Kongsberg, Norway | 2026-09-21 - 2026-09-24

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

433 pull requests were merged in the last week

Compiler

Library

Cargo

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Lot of mixed results this week. One big regression from #152931 makes the results look pretty negative, but otherwise the week was fairly quiet.

Triage done by @panstromek. Revision range: 5b61449e..6f22f613

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	1.0%	[0.1%, 4.2%]	27
Regressions ❌ (secondary)	0.2%	[0.0%, 0.6%]	36
Improvements ✅ (primary)	-0.1%	[-0.2%, -0.1%]	3
Improvements ✅ (secondary)	-0.3%	[-2.8%, -0.0%]	14
All ❌✅ (primary)	0.9%	[-0.2%, 4.2%]	30

1 Regression, 1 Improvement, 4 Mixed; 1 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:

RFC: map_or_default in Option and Result

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

Cargo

feat: add frame-pointers profile option

Compiler Team (MCPs only)

Language Reference

Guarantee alignment of fixed-width integer primitives

No Items entered Final Comment Period this week for Rust RFCs, 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

Upcoming Events

Rusty Events between 2026-03-25 - 2026-04-22 🦀

Virtual

2026-03-25 | Virtual (Girona, ES) | Rust Girona
- Rust Girona Hack & Learn 03 2026
2026-03-26 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-03-31 | Virtual (Tel Aviv-yafo, IL) | Code Mavens 🦀 - 🐍 - 🐪
- Web development using axum in Rust - part 1
2026-04-01 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-04-01 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-04-02 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-04-04 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-04-09 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-04-14 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-04-14 | Virtual (London, GB) | Women in Rust
- 👋 Community Catch Up
2026-04-15 | Virtual (Vancouver, BC, CA) | Vancouver Rust
- Nushell
2026-04-19 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: Third Sunday
2026-04-21 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful

Asia

2026-03-28 | Delhi, IN | Rust Delhi
- Rust Delhi Meetup #13
2026-04-17 | Bangalore, IN, Rust India
- Rust India Workshop
2026-04-18 | Bangalore, IN, Rust India
- Rust India Conference

Europe

2026-03-25 | Dresden, DE | Rust Dresden
- First Meetup
2026-03-26 | Copenhagen, DK | Copenhagen Rust Community
- Rust meetup #66 sponsored by Adapt!
2026-03-26 | Paris, FR | Rust Paris
- Rust meetup #84
2026-03-27 | Paris, FR | Rust in Paris
- Rust in Paris
2026-03-28 | Stockholm, SE | Stockholm Rust
- Ferris' Fika Forum #25
2026-04-01 | Berlin, DE | Rust Berlin
- Rust Berlin Talks: The next generation
2026-04-01 | Edinburgh, GB | Rust and Friends
- Rust and Friends (evening pub)
2026-04-01 | Oxford, UK | Oxford ACCU/Rust Meetup.
- Rust/ACCU meetup.
2026-04-02 | London, GB | Rust London User Group
- LDN Talks Spring Community Showcase
2026-04-03 | Edinburgh, GB | Rust and Friends
- Rust and Friends (daytime coffee)
2026-04-07 | Basel, CH | Rust Basel
- Rust Meetup #15 @ letsboot
2026-04-09 | Geneva, CH | Rust Meetup Geneva
- Rust Meetup Geneva
2026-04-09 | Oslo, NO | Rust Oslo
- Rust talks @ AutoStore – "Patterns for Event Driven Systems" and "Rust + WASM"
2026-04-21 | Leipzig, SN, DE | Rust - Modern Systems Programming in Leipzig
- Native GUIs with Rust

North America

2026-03-25 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-03-25 | New York, NY, US | Rust NYC
- Rust NYC's Digital Asset Adoption Special
2026-03-26 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-03-28 | Boston, MA, US | Boston Rust Meetup
- Chinatown Rust Lunch, Mar 28
2026-04-02 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-04-02 | Saint Louis, MO, US | STL Rust
- SIUE Cruft Crawler with LLM
2026-04-04 | Boston, MA, US | Boston Rust Meetup
- Winter Hill Rust Lunch, Apr 4
2026-04-09 | San Diego, CA, US | San Diego Rust
- San Diego Rust April Meetup - Back in person!
2026-04-11 | Boston, MA, US | Boston Rust Meetup
- Brookline Rust Lunch, Apr 11
2026-04-14 | Charlottesville, VA, US | Charlottesville Rust Meetup
- Sharpening Your Rust Skills for Job Interviews
2026-04-16 | Seattle, WA, US | Seattle Rust User Group
- April, 2026 SRUG (Seattle Rust User Group) Meetup
2026-04-18 | Boston, MA, US | Boston Rust Meetup
- Harvard Square Rust Lunch, Apr 18
2026-04-20 - 2026-04-22 | Portland, OR | Tokio
- TokioConf 2026
2026-04-21 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-04-22 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground

Oceania

2026-03-26 | Melbourne, AU | Rust Melbourne
- TBD March Meetup

South America

2026-04-11 | Argentina, AR | Oxidar Org
- Oxidar.org Hackaton - Snakear - ¡Veni a hackear con Rust!
2026-04-17 | Rio de Janeiro, BR | Meetups Rust RJ
- Meetup Rust RJ

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

Code does not become better out of thin air just because you rewrite it in #rustlang.

– allp on mastodon

Despite a third week gone by without a suggestion, llogiq is unrelenting in his quest to find a quote worth your while.

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 643

TWiR Contributors — Wed, 18 Mar 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

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

Free TokioConf tickets for contributors and open source maintainers

Crate of the Week

This week's crate is grab, a command-line tool to quickly convert CSV to JSON.

Thanks to Gábor Maksa 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.

Oxidize Conference | CFP open until 2026-03-23 | Berlin, Germany | 2026-09-14 - 2026-09-16
EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17
NDC Techtown 2026 | CFP open until 2026-05-03 | Kongsberg, Norway | 2026-09-21 - 2026-09-24

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

427 pull requests were merged in the last week

Compiler

provide better suggestions for inference errors on .collect()?

Library

Cargo

Rustdoc

rustdoc-json: Add optional support for rkyv (de)serialization

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Another fairly quiet week, with few changes and overall neutral performance.

Triage done by @simulacrum. Revision range: 3945997a..5b61449e

1 Regression, 1 Improvement, 2 Mixed; 3 of them in rollups 35 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

Rust RFCs

Add homogeneous_try_blocks RFC

Compiler Team (MCPs only)

Language Reference

[type layout] usize and isize have the same size and alignment

Leadership Council

Discuss travel grants 2026 projections

No Items entered Final Comment Period this week for 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.

2026-03-18 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Embedded Rust
2026-03-18 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Hybrid event with Rust Dortmund!
2026-03-18 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-03-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- March, 2026 SRUG (Seattle Rust User Group) Meetup
2026-03-20 | Virtual | Packt Publishing Limited
- Rust Adoption, Safety, and Cloud with Francesco Ciulla
2026-03-24 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-03-24 | Virtual (London, UK) | Women in Rust
- Lunch & Learn: Crates, Tips & Tricks Lightning Talks - Bring your ideas!
2026-03-25 | Virtual (Girona, ES) | Rust Girona
- Rust Girona Hack & Learn 03 2026
2026-03-26 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-04-01 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-04-01 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-04-02 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-04-04 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-04-09 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-04-14 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-04-14 | Virtual (London, GB) | Women in Rust
- 👋 Community Catch Up
2026-04-15 | Virtual (Vancouver, BC, CA) | Vancouver Rust
- Nushell

Asia

2026-03-19 | Seoul, KR | Seoul Rust (Programming Language) Meetup
- Seoul Rust Meetup
2026-03-22 | Tel Aviv-yafo, IL | Rust 🦀 TLV
- In person Rust March 2026 at AWS in Tel Aviv
2026-03-28 | Delhi, IN | Rust Delhi
- Rust Delhi Meetup #13

Europe

2026-03-18 | Dortmund, DE | Rust Dortmund
- Rust Dortmund Meetup - Intro to Embedded Rust - March
2026-03-19 - 2026-03-20 | Warsaw, PL | Rustikon
- Rustikon Conference
2026-03-23 | Augsburg, DE | Rust Meetup Augsburg
- Rust Meetup #18: Ludwig Weinzierl - Bevy: Spielentwicklung mit Rust
2026-03-23 | Amsterdam, NL | Open Source SecurityCon
- Open Source SecurityCon EU 2026
2026-03-24 | Aarhus, DK | Rust Aarhus
- Hack Night - Advent of Code
2026-03-24 | Manchester, UK | Rust Manchester
- Rust Manchester March Code Night
2026-03-24 | Trondheim, NO | Rust Trondheim
- Rust projects - show and tell in March
2026-03-25 | Dresden, DE | Rust Dresden
- First Meetup
2026-03-26 | Paris, FR | Rust Paris
- Rust meetup #84
2026-03-27 | Paris, FR | Rust in Paris
- Rust in Paris
2026-03-28 | Stockholm, SE | Stockholm Rust
- Ferris' Fika Forum #25
2026-04-01 | Berlin, DE | Rust Berlin
- Rust Berlin Talks: The next generation
2026-04-01 | Oxford, UK | Oxford ACCU/Rust Meetup.
- Rust/ACCU meetup.
2026-04-02 | London, GB | Rust London User Group
- LDN Talks Spring Community Showcase
2026-04-07 | Basel, CH | Rust Basel
- Rust Meetup #15 @ letsboot
2026-04-09 | Geneva, CH | Rust Meetup Geneva
- Rust Meetup Geneva
2026-04-09 | Oslo, NO | Rust Oslo
- Rust talks @ AutoStore – "Patterns for Event Driven Systems" and "Rust + WASM"

North America

2026-03-18 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Embedded Rust
2026-03-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- March, 2026 SRUG (Seattle Rust User Group) Meetup
2026-03-19 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-03-19 | Nashville, TN, US | Music City Rust Developers
- Applied Rust - Building Rust Applictions
2026-03-19 | New York, NY, US | Rust NYC
- Rust NYC: Social Interoperability - Rust, C++ and The Greater Good
2026-03-21 | Boston, MA, US | Boston Rust Meetup
- Porter Square Rust Lunch, Mar 21
2026-03-25 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-03-25 | New York, NY, US | Rust NYC
- Rust NYC's Digital Asset Adoption Special
2026-03-26 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-04-02 | Saint Louis, MO, US | STL Rust
- SIUE Cruft Crawler with LLM
2026-04-09 | San Diego, CA, US | San Diego Rust
- San Diego Rust April Meetup - Back in person!
2026-04-14 | Charlottesville, VA, US | Charlottesville Rust Meetup
- Sharpening Your Rust Skills for Job Interviews

Oceania

2026-03-26 | Melbourne, AU | Rust Melbourne
- TBD March Meetup

South America

2026-03-21 | São Paulo, BR | Rust São Paulo Meetup
- Encontro do Rust-SP (migrado pro Lumma)
2026-04-11 | Argentina, AR | Oxidar Org
- Oxidar.org Hackaton - Snakear - ¡Veni a hackear con Rust!

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

What we collectively build, beyond the code artifacts that the compiler+tools are, is a group of people who come back, who learn, who share their understanding, who align their tastes, who take input from the community, etc etc. Merging an LLM-generated PR feeds only the “we have code that works” part of the Project; it’s not participating in all the other feedback cycles that make the project alive.

– Nadrieril on the Rust Project Perspectives on AI

Despite another week without a suggestion, llogiq is pleased with his choice.

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