Hello and welcome to another issue of This Week in Rust! Rust is a systems language pursuing the trifecta: safety, concurrency, and speed. This is a weekly summary of its progress and community. Want something mentioned? Tweet us at @ThisWeekInRust or send us a pull request. Want to get involved? We love contributions.

This Week in Rust is openly developed on GitHub. If you find any errors in this week's issue, please submit a PR.

Updates from Rust Community

No newsletters or research articles this week.


Project/Tooling Updates


Rust Walkthroughs


Crate of the Week

This week's crate is serde-encrypt, a library that adds encryption to all Serialize impls.

Thanks to Sho Nakatani for the nomination.

Submit your suggestions and votes for next week!

Call for Participation

Always wanted to contribute to open-source projects but didn't 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.

Updates from Rust Core

301 pull requests were merged in the last week

Rust Compiler Performance Triage

A few small regressions on smaller benchmarks (e.g., helloworld), likely centered around more IR being generated in a few cases.

Triage done by @simulacrum. Revision range: d192c80..3912083

2 Regressions, 1 Improvements, 0 Mixed; 1 of them in rollups

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

New RFCs

Upcoming Events


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.

Rust Jobs

ChainSafe Systems


Tweet us at @ThisWeekInRust to get your job offers listed here!

Quote of the Week

At last, I can name my unsafe functions appropriately.

unsafe fn e͙̤͎̪͒x̲͓̞̤͍̻̺̂͗͛͆͡t̜̣͊̓ͩ̍̑e̩͖͙͎̼̖͉ͮṇ̨͖̎̓ͅd̗̼͕ͫ̅_̲̦̥̙̙͍͂́l͙͙̦̞̠̃͌͒i̹̘͍̳̊ͪͦͤ͒̊͋f̨ͥ̄̌ḛ̜͗̉̃̎̂̔̐t̩̲̘͕͉̺̫̓͗́i̹̤̭ͭ͆̔ͪͤ͢m̹̤̜̗̫̩͍ͨe̝͒ͣ<'b>(r: R<'b>) -> R<'static>

Freeky on r/rust

Thanks to Vincent de Phily for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, and cdmistman.

Discuss on r/rust