Jon Gjengset @jonhoo Twitter profile

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Jon Gjengset

4 months

What better way to start 2024 than to announce that I'm now (finally) on the sponsorship train! The details are all on Discord @ and on the various pages where you can now support me:

Join the Jay's herd Discord Server!

A community for those who happen to enjoy Jon Gjengset's work (https://jonhoo.eu). | 1343 members

discord.com

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Jon Gjengset

@jonhoo

3 years

Big announcement time 📢 For a while now, I've been working on a book that covers the next steps of @rustlang after "the book" — everything from API design to error handling to concurrency to async to FFI. And the early access was just released over at ! 🎉

Rust for Rustaceans

Bridges the gap between beginners and professionals, enabling you to write apps, build libraries, and organize projects in Rust.

nostarch.com

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Jon Gjengset

@jonhoo

4 years

Big news time 📢 After I finish my thesis, I'll be joining Amazon AWS, specifically to drive adoption of Rust internally at Amazon! The role will include plenty of interaction with the Rust ecosystem and community, so if all goes to plan you'll only see more of me going forward!

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Jon Gjengset

@jonhoo

4 years

In January, @anishathalye , @jjgort , and I ran a short class at @MIT_CSAIL on topics we think are missing in most CS programs — tools we use every day that everyone should know, like bash, git, vim, and tmux. And now the lecture notes and videos are online!

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Jon Gjengset

@jonhoo

3 years

Exciting news — I'm going to start doing Rust streams as part of my job at AWS! Nothing will change about the format or content, but it'll allow me to do more regular Crust of Rust and Unsafe Chronicles streams since I won't just do them on my spare time \o/

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Jon Gjengset

@jonhoo

2 years

I... wrote a book. Like an actual, real, physical book. It's such a strange feeling finally holding it in my hands. I hope it teaches some people some things, and maybe even elicits some laughs along the way! ❤️

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Jon Gjengset

@jonhoo

1 year

Amazon's (wild) new return-to-office policy is making it … more difficult to come to an agreement about me moving to Norway in June. Which means that come summer I may be looking for a Rust job in Europe! If you have an opportunity that may be relevant (🧵), reach out!

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Jon Gjengset

@jonhoo

2 years

My book is on the swag table at @rustconf ! Still so weird to see it out in the wild 👀

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Jon Gjengset

@jonhoo

2 years

Okay, learning time! Name a @rustlang type (can be generic), and I'll (try to) tell you something you didn't know about that type!

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Jon Gjengset

@jonhoo

3 years

Rust for Rustaceans is off to the printer 😮🎉

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Jon Gjengset

@jonhoo

2 years

This week I've used GCC 7 on a GCC 4 platform to build Python to build GCC 11 to build GCC 11 to build Clang 14 to build Clang 14 to build Rust's LLVM all so I could get rid of some paths that had snuck their way into librustc_driver's debug symbols. This is fine 🐕☕🏠🔥🔥🔥.

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Jon Gjengset

@jonhoo

3 years

The full digital version of Rust for Rustaceans is now up on ! I don't have a final schedule for the print version yet, but you can at least start reading it in pixel form 🎉 I hope you end up finding it useful ❤️

Rust for Rustaceans

Bridges the gap between beginners and professionals, enabling you to write apps, build libraries, and organize projects in Rust.

nostarch.com

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Jon Gjengset

@jonhoo

2 years

C programmers, are you okay?

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Jon Gjengset

@jonhoo

2 years

PSA: Before copy-pasting a GitHub source code link, especially one that links to a line or line range, hit `y` to make the URL include the current commit hash. That way the link will keep working even if the file is later changed or moved/deleted.

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Jon Gjengset

@jonhoo

2 years

Making it possible to turn source code into executables was a mistake. I keep coming to the inevitable conclusion that source code is best left uncompiled. Once you make it runnable, that's when the trouble starts...

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Jon Gjengset

@jonhoo

1 month

The "decrusting tokio" stream is up! We explored the runtime, blocking, I/O, select, cancellation, mutexes, and also covered several common pitfalls and less-known subtleties. I *think* I covered all I want people to know in "only" 3.5 hours 😅 Enjoy‽

Decrusting the tokio crate

In this stream, we peeled back the crust on the tokio crate — https://github.com/tokio-rs/tokio/ — and explored its interface, structure, and mechanisms. We ...

www.youtube.com

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Jon Gjengset

@jonhoo

3 years

I got the receipt from the department — my thesis is now (finally) fully done, and I am officially a PhD graduate 🤓🎉 You can read it here if you are so inclined: . Also, my girlfriend is awesome and got me a mug for the occasion 😅

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Jon Gjengset

@jonhoo

4 years

Hi friends! I recently gave a talk aimed at companies that are considering adding @rustlang to their tech stack. In it, I presented the upsides and downsides of Rust, and how it differs from C/C++, Java, Python, and Go. And it's now on YouTube 🍿📽️

Considering Rust

The Rust programming language has become a serious contender in the space of "systems" programming languages, and has recently been adopted by many of the te...

www.youtube.com

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Jon Gjengset

@jonhoo

3 years

Woah, I now somehow have more subscribers on YouTube than the official Rust channel 😮

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Jon Gjengset

@jonhoo

1 month

It's finally time for a "decrusting tokio" stream! We'll talk about blocking, cancellation, spawning, mechanisms for synchronization, and some relevant under-the-hood things. Will happen 12:00pm UTC on Friday () on YouTube:

Decrusting the tokio crate (live version)

Live version of https://youtu.be/o2ob8zkeq2sIn this stream, we peeled back the crust on the tokio crate — https://github.com/tokio-rs/tokio/ — and explore it...

www.youtube.com

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Jon Gjengset

@jonhoo

3 years

In Rust-unrelated news, I have a cat now! Meet Chai (because I love tea and she looks like black tea with a swirl of milk) ❤️ Picked her up from a shelter the morning of Christmas Eve. What a present! Will try to resist the urge to post pictures constantly 😅

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Jon Gjengset

@jonhoo

4 years

Good news everyone! I passed my thesis defense yesterday, and now only have some minor revisions to the thesis itself left before I am completely done 🎉 You can find a recording of the thesis presentation here:

Thesis: Partial State in Dataflow-Based Materialized Views

This is my PhD dissertation presentation, which I gave at MIT (virtually) on October 22nd, 2020. It was immediately followed by my thesis defense, which I pa...

www.youtube.com

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Jon Gjengset

@jonhoo

1 year

For a while, I've been saying that you need to *make* time for things, as you won't *find* time. Time to follow through. Starting this week, I'm going to do a @rustlang stream every 4th Friday at 6pm UTC. Sometimes long, sometimes short, sometimes Q&A, but always something! 📺

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Jon Gjengset

@jonhoo

10 months

Now that the move to Norway is finally reaching a stable state, I'm excited to announce that come August I'll be joining @HelsingAI ; a European company that develops next generation defense software and AI for European democracies.

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Jon Gjengset

@jonhoo

2 years

I'm so excited for this change. Sparse HTTP registry support for cargo is going to completely get rid of that slow "Updating index" … "resolving deltas" step you sometimes get, and is going to make a huge difference for CI builds!

Call for testing: Cargo sparse-registry | Rust Blog

Empowering everyone to build reliable and efficient software.

blog.rust-lang.org

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Jon Gjengset

@jonhoo

3 years

Just submitted the first draft of the last chapter of Rust for Rustaceans 📕 There's still a bunch of editing to do, and many passes the text must go through before it's done, but it's a big milestone nonetheless! And just in time for vacation too 🎉

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Jon Gjengset

@jonhoo

7 months

A little while ago, we solved some of @flydotio 's distributed system challenges in @rustlang (). That was fun, so following in the same vein, this Thursday at 7:30am UTC () we'll try implementing a BitTorrent client from scratch! 🌪️🦀

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

everytimezone.com

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Jon Gjengset

@jonhoo

4 years

I'm making a "Why Rust" presentation for companies that are curious about what @rustlang offers compared to their current language of choice (usually C++/Java/Python). What, to you, is the #1 reason to consider Rust over each of the languages above in a _commercial_ setting?

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Jon Gjengset

@jonhoo

3 years

I've mused about the next live-coding stream for long enough. On Saturday we're going to implement the concurrency algorithm from the academic paper "A Practical Wait-Free Simulation for Lock-Free Data Structures" by @petrank and Shahar Timnat in @rustlang . Details in thread 👇

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Jon Gjengset

@jonhoo

9 months

The "axum decrusted" video is up! We talk about tower::Service, the Handler trait, Router, and the State extractor, and just generally peel back the crust of the delicious axum pie to expose its gooey center. Turns out dark trait magic is one ingredient 👀

Decrusting the axum crate

In this stream, we peel back the crust on the axum crate — https://github.com/tokio-rs/axum/ — and explore its interface, structure, and mechanisms. We talk ...

www.youtube.com

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Jon Gjengset

@jonhoo

2 years

I've gotten a *lot* of questions over the years about the future of Noria, my PhD thesis database, along the lines of "when can I use it for real"? Well, back when I graduated I co-founded a company to make that a reality, @readysetio , and it's now public!

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Jon Gjengset

@jonhoo

1 year

Our journey through @rustlang 's std::collections clocked in at 2½ hours, with about 30m per data structure, which I'm pretty happy with! We went through them all in a decent amount of detail, including implementation outline and trade-offs.

Crust of Rust: std::collections

In this video we go over the various collection types in the Ruststandard library (effectively `std::collections`), and discuss a bitabout how they work, whe...

www.youtube.com

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Jon Gjengset

@jonhoo

3 years

Just submitted the last round of edits (in theory) for the last chapter of Rust of Rustaceans. What remains now is mostly procedural stuff, like indexing the book, and then it'll go to print! Such a weird feeling — my evenings will be my own again 😮

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Jon Gjengset

@jonhoo

4 years

Wow, looks like a more beginner-friendly @rustlang stream is something *a lot* of you want to see. So, let's do one! Wednesday @ 8:30p UTC, I'll do a shorter, code-driven stream that covers multiple lifetimes, strings, and some generics. If it goes well, there may be more 👀 1/3

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Jon Gjengset

@jonhoo

11 months

I haven't disappeared; moving is just swallowing 100% of my time. The hope is I'll be more settled end of this coming week, and then I'll announce my new job, a Q&A stream, and start working down my 234 GitHub notifications and the longest inbox backlog I've had in a few years 😅

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Jon Gjengset

@jonhoo

4 years

I'm getting closer to graduating (hoping by Nov 1), and it's time to figure out what's next! I'd like to continue working on @rustlang and its ecosystem, ideally on open-source libraries and tools, so if you know of a good fit that supports remote work from LA, please reach out!

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Jon Gjengset

@jonhoo

6 months

A little while ago, I gave a talk about the many (current and future) meanings of impl Trait at the @rustlang meetup in Copenhagen. The talk was about 30 minutes, followed by almost 45 minutes of (good) Q&A 😅 🙋 And it's now up on YouTube!

Impl Trait aka Look ma’, no generics! by Jon Gjengset

#rust #rustlang #programming Slides: https://jon.thesquareplanet.com/slides/impl-trait/Hosted at DIKU (University of Copenhagen) on the 28th of September 202...

www.youtube.com

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Jon Gjengset

@jonhoo

3 years

Michael's blog post "Common Newbie Mistakes and Bad Practices in Rust: Bad Habits" is a good read if you're coming to @rustlang from other languages!

Common Newbie Mistakes and Bad Practices in Rust: Bad Habits

When you are coming to Rust from another language you bring all your previous experiences with you. Often this is awesome because it means you aren’t learning programming from scratch! However, you...

adventures.michaelfbryan.com

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Jon Gjengset

@jonhoo

3 years

Woah, I'm almost at 10k followers — that's crazy! I suppose that means my signal-to-noise ratio is acceptable 😅 You're all awesome, and none of my content would exist without your continued excitement and desire to learn with me ❤️

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Jon Gjengset

@jonhoo

7 months

Recording of the stream where we implement (part of) a BitTorrent client in @rustlang is now up. We followed a set of challenges from @codecraftersio , and got nearly all the way through even with a power outage! I do love implementing protocols… 😅

Implementing (part of) a BitTorrent client in Rust

In this stream, we're doing the "implement BitTorrent" challenge from https://app.codecrafters.io/join?via=jonhoo in Rust. Essentially, we're implementing a ...

www.youtube.com

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Jon Gjengset

@jonhoo

6 months

After doing the BitTorrent challenge in @rustlang , I had an urge to do some re-organization to better fit what a real implementation would look like when it has to handle files, concurrency, etc. So, let's do a stream on exactly that Friday at 08:30 UTC ()!

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

everytimezone.com

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Jon Gjengset

@jonhoo

1 year

Oh fun, I found a bug in Android's eSIM handling! Which means none of my SIM cards now work, and trying to erase them re-triggers the bug. Any Android Googlers want to take a look? A .flib.log.WhatATerribleException exception is involved (yes really).

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Jon Gjengset

@jonhoo

1 year

Okay, this Friday we're going to try for a new @rustlang series — "Decrusted" — where we'll dig into a particular crate in the ecosystem and figure out how it does what it does. First up: serde, decrusted! Friday at 6pm UTC:

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

everytimezone.com

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Jon Gjengset

@jonhoo

3 years

I think it's about time we do a Crust of Rust on atomics and memory ordering! So, this *Friday* at 5pm UTC (), let's dive into @rustlang 's std::sync::atomic and try to figure out what's going on in there and what it's all for 🔬 Come one, come all!👩‍💻🧑🏽‍💻👨🏿‍💻

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Jon Gjengset

@jonhoo

2 years

I know, I know, I've been bad at doing regular streams. What can I say — life got in the way. But it's time for another Crust of @rustlang ! This time, build scripts and FFI 🧱 We'll pick a C library and write a -sys for some of it on Saturday at 5pm UTC ()!

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

everytimezone.com

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Jon Gjengset

@jonhoo

2 years

Wooo — my team, which owns the @rustlang infrastructure and developer tooling internally at @awscloud , is expanding 🎉 If you like building tools and resources for devs, and contributing back to the community where possible, apply (incl. remote) here:

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Jon Gjengset

@jonhoo

2 months

A bit of a delayed announcement, but this week's scheduled stream will be on Saturday at 0930 UTC (). This time, we'll implement the git version control system core bits from scratch! Will be live at

Implementing (parts of) git from scratch in Rust [live version]

Live version of https://youtu.be/u0VotuGzD_w.0:00:00 Void0:03:14 Audio on0:04:50 Video on0:10:46 Stream on0:22:05 Brief disconnect0:23:08 Stream resumes2:37:...

www.youtube.com

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Jon Gjengset

@jonhoo

3 years

I'm very happy with how today's stream on atomics and memory ordering in @rustlang turned out. Hopefully this'll help clear up the confusion and mystery that surrounds the std::sync::atomic module, and allow more people to write good concurrent code! 🧮

Crust of Rust: Atomics and Memory Ordering

In this episode of Crust of Rust, we go over Rust's atomic types, including the mysterious Ordering enum. In particular, we explore the std::sync::atomic mod...

www.youtube.com

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Jon Gjengset

@jonhoo

1 year

We got through a few of the @flydotio distributed systems challenges (), and it was a fun (and hopefully educational) process! Might do a part 2 one day to go through more of them now that we have a rough framework in place. 📺 at .

Solving distributed systems challenges in Rust

In this stream we work through the fly.io distributed systems challenges (https://fly.io/dist-sys/) in Rust, and solve all the way up to challenge 3c.You can...

www.youtube.com

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Jon Gjengset

@jonhoo

2 years

Our experiment implementing the @3blue1brown Wordle algorithm (or at least, an approximation of it) in @rustlang went pretty well, and we managed to get some pretty impressive speedups (~13500x from the first to the last version)! Video is up now at

Implementing and Optimizing a Wordle Solver in Rust

We implement a Wordle solver in Rust based off on the excellent3blue1brown video on the same topic:https://www.youtube.com/watch?v=v68zYyaEmEAAnd then we pro...

www.youtube.com

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Jon Gjengset

@jonhoo

2 years

I hacked together a little website for Rust for Rustaceans over at . Nothing fancy, just some quotes from reviews, updates since the book's release, known errata (which I'm sure will grow with time), and some interviews. Let me know what you think!

Rust for Rustaceans

rust-for-rustaceans.com

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Jon Gjengset

@jonhoo

2 years

The real news of the @StackOverflow Developer Survey isn't that @rustlang is most loved yet again, or that it's now also most wanted, it's that for the second year in a row the most loved editor is @Neovim :

Stack Overflow Developer Survey 2022

In May 2022 over 70,000 developers told us how they learn and level up, which tools they’re using, and what they want.

survey.stackoverflow.co

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Jon Gjengset

@jonhoo

1 month

The recording of my talk at @RustNationUK on best practices for using Rust in critical software is now up!

Jon Gjengset - Towards Impeccable Rust

Rust is increasingly used in high-stakes sectors where errors can have serious consequences. In fields such as healthcare, aerospace, defense, and finance, s...

www.youtube.com

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Jon Gjengset

@jonhoo

8 months

For quite some time, I've been hearing that it's hard to find @rustlang jobs that aren't in the cryptocurrency space or in very early-stage startups. Well, @HelsingAI is hiring almost exclusively Rust folks, and we're neither of those things [1/10]

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Jon Gjengset

@jonhoo

2 months

Recording of today's stream implementing some core git plumbing commands in @rustlang is now up! We got all the way to a working `git commit` 🎉

Implementing (parts of) git from scratch in Rust

In this stream, we implement core pieces of git from scratch by following the CodeCrafters git "course" @ https://app.codecrafters.io/join?via=jonhoo, just l...

www.youtube.com

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Jon Gjengset

@jonhoo

4 years

The @rustlang 2019 survey: "People are [..] asking for more learning material[,] mainly beginner and intermediate level[.] A lot of these requests also asked for video content specifically." — If I were to do a more beginner-friendly Rust stream, what would you want to see?

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Jon Gjengset

@jonhoo

3 months

Recording of today's stream decrusting the tracing crate is now up! We went over both "sides" of tracing. First spans and events, then subscribers, layers, and filters. And apart from a brief ramble on per-level filters, I think it turned out quite good!

Decrusting the tracing crate

In this stream, we peel back the crust on the tracing crate —https://github.com/tokio-rs/tracing/ — and explore its interface,structure, and mechanisms. We t...

www.youtube.com

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Jon Gjengset

@jonhoo

3 years

Aleksey (matklad)'s blog post on "fast rust builds" is Very Good.

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Jon Gjengset

@jonhoo

4 years

I regularly have people ask me to do a Noria stream (my @rustlang research database). So far, I've hesitated, as I worry it'll be hard to follow given that you'd be dropped into a big code base. But now is a good time to try! Who would be interested in watching me do research? 🔬

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Jon Gjengset

@jonhoo

4 years

Not gonna' lie — PhDs are cool and all, but it's also pretty exciting to crimp your own Cat 6 cable and have it work.

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Jon Gjengset

@jonhoo

2 years

Nuggets about each and every (strict) @rustlang keyword — let's go! 1/39

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Jon Gjengset

@jonhoo

2 months

I'm quite excited to have a surprise slot at Rust Nation! I'll be diving into some of the techniques and tools needed to write dependable, misuse-resistant Rust in high-stakes sectors where errors can have serious consequences (healthcare, aerospace, defense, finance, etc.).

Rust Nation UK 🦀

@RustNationUK

2 months

📢 Surprise Guest Speaker! We're thrilled to announce Jon Gjengset ( @jonhoo ) as a guest speaker for #rustnationuk24 next week! Join Jon's talk 'Towards Impeccable Rust' or find him with the @HelsingAI team running our Hackathon. #rustnationuk #rust #rustlang #rustprogramming

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Jon Gjengset

@jonhoo

2 years

Recording of today's Crust of Rust on build scripts and foreign-function interfaces (FFI) is now up! We went over the build scripts of several popular *-sys crates, and also wrote our own (basic) binding against libsodium.

Crust of Rust: Build Scripts and Foreign-Function Interfaces (FFI)

This time we go over Cargo build scripts and Rust foreign-function interfaces, including looking at some widely used *-sys crates. We also wrote our own bind...

www.youtube.com

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Jon Gjengset

@jonhoo

2 years

Just had a recruiter cold email me with the subject line "Rust on your GitHub". No wonder people feel like there are only cryptocurrency jobs in Rust these days when the recruiters seemingly email *anyone with a Rust repo*. I dislike this style of batch recruiting so much...

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Jon Gjengset

@jonhoo

3 years

I'm thinking of doing a new (infrequent) Crust of Rust "sub-series" on the many pitfalls of unsafe in @rustlang , where each episode looks at a particular trickiness or gotcha. The first one would likely follow my journey with . Does that sound interesting?

Implement sound map value aliasing by jonhoo · Pull Request #83 · jonhoo/left-right

This implementation gets rid of the unsound ShallowCopy trait (#74 & rust-lang/unsafe-code-guidelines#35 (comment)), and replaces it with a wrapper type around aliased values. The core mechanis...

github.com

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Jon Gjengset

@jonhoo

3 years

Weird(?) stream idea: "But Why?" — take a simple @rustlang example, pick some syntax, and ask "why?" repeatedly. Think println! -> stdout+write! -> ! -> format_args! -> Display/Debug. Not sure who it would be for though. Folks coming from other languages? Would it be interesting?

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Jon Gjengset

@jonhoo

2 years

My favorite thing about being paid partially in stocks? Probably the part where the biannual vesting happens as the stock is down by 1/3, so you're paid tens of thousands of $ less than originally expected. Probably that. Or maybe the part where it's entirely out of your control.

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Jon Gjengset

@jonhoo

4 years

I wonder — is there interest in a shorter stream where I walk through some of my thesis evaluation work so far? Relatively informal, just chatting about what the thesis work focuses on, how I'm evaluating it, what the figures show, how I got to these particular figures, etc.?

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Jon Gjengset

@jonhoo

2 years

Hot(?) take: Rust crates, incl. libraries, should check in Cargo.lock and have 3 CI jobs: -Zminimal-versions, --locked, and rm Cargo.lock. All 3 run tests. Only --locked should be marked as required to minimize friction for new contributors' PRs, which should be 1st priority.

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Jon Gjengset

@jonhoo

3 months

It's finally time to do a decrusted stream about tracing — the so-much-more-than-logging crate that gets requested pretty much every video! We'll do it Friday at 4pm UTC () just like the stream calendar promised for once 😅

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

everytimezone.com

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Jon Gjengset

@jonhoo

3 years

The Crust of @rustlang stream on async/await is now up! My hope is that it's a bit more approachable than the deep-dive video I did a while ago, and that it provides some of the intuition and mental model that comes in handy when _using_ async/await.

Crust of Rust: async/await

Finally, we tackle the topic of async/await in Rust, and specifically looking at how to use and think about async/await more so than how it works under the h...

www.youtube.com

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Jon Gjengset

@jonhoo

2 years

Crust of Rust video on Send, Sync, and their implementors (and non-implementors) is now up! Short (for me anyway) and sweet this time⏱️

Crust of Rust: Send, Sync, and their implementors

This time we go over the Send and Sync marker traits from the standard library, as well as some of the most important implementors (and non-implementors) of ...

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Jon Gjengset

@jonhoo

1 year

Did... did my hotel just include an @MSN burn in their Wi-Fi connection instructions?

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Jon Gjengset

@jonhoo

3 years

I'm back from vacation, so it's time for another Crust of Rust! This time, I'll try for a more concise async/await video, focusing on what most users see (async/await) more so than the underlying mechanisms (Future/Pin/Waker). Let's do Friday @ 5p UTC () 🦀

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

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Jon Gjengset

@jonhoo

5 years

The recording of our 3-hour deep-dive into the Why, What, and How of Pinning in @rustlang is now up! Thanks all for watching and for all the questions — the stream is better because of you ❤️ Next video in ~3 weeks.

The Why, What, and How of Pinning in Rust

With the Future trait stabilized and async/await coming soon, many more people are being exposed to the Pin type and its sibling trait Unpin. In this video, ...

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Jon Gjengset

@jonhoo

10 months

Okay, finally time to get back on schedule! This Friday at 4pm UTC () we'll do another "decrusted" stream, this time on the axum web framework. It'll be live on YouTube and Twitch at the usual locations, and recording on YouTube afterwards as always!

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

everytimezone.com

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Jon Gjengset

@jonhoo

4 years

The Crust of Rust mini session on lifetimes seems to have been helpful, so let's do more! I'll cover declarative macros (macro_rules!) on Wed at 8:30p UTC (). As before, it'll assume you have some @rustlang experience already, but anyone is welcome ♥️🥧

Every Time Zone Converter

Easily find the exact time difference with the visual Time Zone Converter. Find meeting times for your contacts, locations and places around the world. Never warp your brain with time zone math again.

everytimezone.com

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Jon Gjengset

@jonhoo

1 year

Earlier this week I gave a guest lecture on supply chain security as part of MIT's computer security class (6.5660, formerly 6.858) . That lecture is now up on YouTube for any of you who may be interested in that sort of stuff!

Supply Chain Security — MIT 6.5660 Computer Security guest lecture

This is a recording of a guest lecture I gave in MIT's 6.5660 Computer Security class (formerly 6.858) in May of 2023: https://css.csail.mit.edu/6.858/2023/ ...

www.youtube.com

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Jon Gjengset

@jonhoo

4 years

For all of you who enjoy @rustlang live streams, there's now a "team" on Twitch (thanks @rochacbruno !) that groups together a bunch of Rust streamers that you may find interesting: . And as always, come say hi on Discord at 👋

Twitch

Twitch is the world's leading video platform and community for gamers.

www.twitch.tv

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Jon Gjengset

@jonhoo

2 years

This was a really fun watch. Makes me want to implement a solver myself in Rust. Mostly to see how fast I can make it while retaining accuracy 😅 Mayne that'd make for a fun performance oriented stream 🤔

Grant Sanderson

@3blue1brown

2 years

New video! ⬜⬜⬜⬜⬜ 🟩🟨🟩⬜⬜ 🟩🟩🟩🟩🟩 It's an exploration for writing a Wordle solver, with the challenge of not using the official list of Wordle answers (except as a test set), which is really just an excuse for an information theory lesson.

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Jon Gjengset

@jonhoo

2 years

I have a crate I really want to reduce the compile time of, and figured I might as well stream my attempt! So, this Friday at 10pm UTC (), let's explore some ways to do that. And yes, I'll be stealing some things from the excellent

fasterthanlime

@fasterthanlime

2 years

✨ Why is my Rust build so slow? In this article, we look at a LOT of potential reasons why our Rust build could be slow. And discover it's none of them. So we ask rustc to look deep inside the self... and we find our answer.

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Jon Gjengset

@jonhoo

1 year

Woah, four weeks flew by! Late to post, but tomorrow's scheduled stream is still happening at 5pm UTC (). We'll take on the @flydotio distributed systems challenges in Rust: . Won't do all of them, but it'll be fun to try a few!

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Jon Gjengset

@jonhoo

2 years

😮:🏠🚚📙

No Starch Press

@nostarch

2 years

Ready to take the next step to professional-level programming in #Rust ? Rust for Rustaceans by @jonhoo will help you do more and learn the underlying mechanisms of @rustlang . Now shipping:

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Jon Gjengset

@jonhoo

1 year

First video in the "decrusted" series where we peel back the crust of the serde crate is now up: . I quite like the format, so expect to see more of these!

Decrusting the serde crate

In this stream, we peel back the crust on the serde crate — https://github.com/serde-rs/serde/ — and explore its interface, structure, and mechanisms. We tal...

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Jon Gjengset

@jonhoo

3 years

I want to do another port-it-to- @rustlang live-coding stream — any suggestions? I'm specifically looking for useful data structures (like HdrHistogram) or developer tools (like flamegraph) where having them in Rust might provide value to the ecosystem.

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Jon Gjengset

@jonhoo

1 year

About time we did a Crust of Rust again! This *Saturday* at 5pm UTC () we'll look at the various collection types in @rustlang 's std; their advantages, drawbacks, and common uses, as well as a bit about each of their implementations. Come one come all! 🦀📺

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Jon Gjengset

@jonhoo

3 years

Today's stream on dispatch, trait objects, and dynamically sized types in @rustlang was quite the journey — I think we managed to get through at least most of the sticky bits in the ~2 hours 🎉

Crust of Rust: Dispatch and Fat Pointers

In this episode of Crust of Rust, we go over static and dynamic dispatch in Rust by diving deep into generics, monomorphization, and trait objects. As part o...

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Jon Gjengset

@jonhoo

1 year

4. I'm not looking for work in the cryptocurrency, blockchain, web3, or "DeFi" spaces.

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Jon Gjengset

@jonhoo

3 years

Just wrote the foreword to Rust for Rustaceans, and re-realized that this post from 2018 is one of the reasons why I started doing my videos, and in turn one of the reasons why I wrote the book. So thank you @QuietMisdreavus :)

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Jon Gjengset

@jonhoo

2 years

We didn't actually make the cargo crate compile faster, but we did explore pretty much every tool that might help you reduce your @rustlang crate build time. And found that the tools still have some ways to go to produce actionable information 😅

Making a Rust crate compile faster

In this stream, we try to figured out why the `cargo` crate takes so long to build. We don't ultimately make a meaningful improvement, but we do explore the ...

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Jon Gjengset

@jonhoo

3 years

The video of our first steps into implementing "A Practical Wait-Free Simulation for Lock-Free Data Structures" in @rustlang is up! I miss these longer streams — they're a lot of fun. Still some way to go, but we made good progress!

Lock-Free to Wait-Free Simulation in Rust

In this stream, we start implementing the concurrency algorithm from the academic paper "A Practical Wait-Free Simulation for Lock-Free Data Structures" by E...

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Jon Gjengset

@jonhoo

3 years

It'd be really fun to port Facebook's hazard pointer implementation in Folly to Rust. Would potentially be great for implementing concurrent algorithms in Rust going forward, since concurrent memory reclamation is hard. Maybe that's a good topic for the next stream?

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Jon Gjengset

@jonhoo

11 months

Oh, right, I have a stream scheduled for tomorrow, don't I? 😅 Well, my streaming desk currently looks like this in preparation for my move to Norway (getting on the plane on Friday!), so no stream this week I'm afraid. But definitely Q&A soon!

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Jon Gjengset

@jonhoo

2 months

Oh cool, Rust for Rustaceans is in the latest "Learn You Some Code" @humble Bundle! That means you can get it discounted together with a bunch of other tech books from @nostarch *and* support the Python Software Foundation in the process!

Humble Tech Book Bundle: Learn You Some Code by No Starch

Now’s the time to learn to code! Master Python, Rust, C# & more with this bundle. Start your programming journey & help support the Python Software Foundation!

www.humblebundle.com

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Jon Gjengset

@jonhoo

9 months

I'm so excited that Helsing (where I now work if you missed the announcement) have become a Foundation sponsor! I think it's one of the key ways in which companies can help support the Rust ecosystem beyond purely technical contributions. And I got to ramble in the blog post 😅

Rust Foundation

@rust_foundation

9 months

Please join us in welcoming @helsingai to the Rust Foundation as our newest Silver Member! Learn how Helsing is using #rustlang & why they joined the Foundation in this interview with Dr. Robert Fink (CTO) & @jonhoo (Principal Software Engineer).

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Jon Gjengset

@jonhoo

4 years

The Crust of Rust episode on Rc/RefCell/Cell and Arc/RwLock/Mutex is now up — get it while it's hot! We covered @rustlang smart pointers and interior mutability, and even did a quick-dive into UnsafeCell and the Drop Check 😮

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Jon Gjengset

@jonhoo

4 years

The recording of my first @rustlang mini session is now up! We covered lifetime annotations through a real code example, and people seemed to follow along and understand why the lifetimes were needed and how they worked 🎉 Watch it at

Crust of Rust: Lifetime Annotations

In the 2019 Rust Survey, a lot of people were asking for video content covering intermediate Rust content. So in this first video (possibly of many), we're g...

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Jon Gjengset

@jonhoo

3 years

Stream time! On Friday (5p UTC: ), I'll cover ?Sized, fat pointers, dynamic vs. static dispatch, vtables, and trait objects in @rustlang . Maybe even coherence if we have time. I get a lot of questions about those, so figured let's do them all at once! 🥧🦀

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Jon Gjengset

@jonhoo

3 years

The Crust of Rust episode on subtyping and variance in @rustlang is now up at . Even though it's a thorny topic that I'm fairly new to myself, I _think_ we managed to explain the concepts and their practical implications without too many 🍿moments.

Crust of Rust: Subtyping and Variance

In this episode of Crust of Rust, we go over subtyping and variance — a niche part of Rust that most people don't have to think about, but which is deeply in...

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Jon Gjengset

@jonhoo

2 years

Overheard from a newcomer to @rustlang at a workshop at #reinvent2021 : "This is so nice with types. You can *see* what you did wrong!"

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Jon Gjengset

@jonhoo

2 years

@ekuber @rustlang That's cheating, but I'll bite. Did you know that () implements FromIterator, so you can .collect::<Result<(), E>> to _just_ see if anything in an iterator erred? Did you know that struct S implicitly declares a constant called S, which is why you can make one using just S?

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