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? 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



Project/Tooling Updates

Research Papers


Rust Walkthroughs


Crate of the Week

This week's crate is roogle, a type-based Rust API search engine inspired by Haskell's Hoogle.

Thanks to Hirochika Matsumoto for the suggestion!

Please 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 the Rust Project

316 pull requests were merged in the last week

Rust Compiler Performance Triage

The only significant regressions were 1. two PRs that slowed down doc generation, and 2. some slowdown from the new lints to flag occurrences of Unicode bidirectional control characters. The doc generation regression is being investigated.

Triage done by @pnkfelix. Revision range: 3c8f00..6384dc

6 Regressions, 3 Improvements, 1 Mixed; 4 of them in rollups 39 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

New RFCs

Upcoming Events


North America


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

System Initiative


Sigma Prime



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

Quote of the Week

I always tell myself that code quickly written just to compile looks like Order 66 executed on Christmas day


Clones and unwrapping as far as the eye can see.

Dhghomon on /r/rust

Thanks to UtherII 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