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jweiss.io
Johannes Weiss
@jweiss.io
640 followers 420 following 160 posts
Computer programmer (http://github.com/weissi). Distributed systems, ML infrastructure/eval, Swift, previously #SwiftNIO — ♥ snowboarding London, UK
github.com
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jweiss.io
Johannes Weiss @jweiss.io · 2d
Do you have an FB number with the crash report attached? Possibly even a repro you can share?
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jweiss.io
Johannes Weiss @jweiss.io · 2d
Made a little thing that may help you profile your services from within their own process -- no extra privileges or tools required.
swift.org
Swift Language @swift.org · 2d
New tooling for profiling performance-critical services with Swift -- introducing the Swift Profile Recorder. More here: www.swift.org/blog/swift-p...
Screenshot of the output of Swift Profile Recorder, running Hummingbird’s hello example visualized in Speedscope.
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jweiss.io
Johannes Weiss @jweiss.io · 2d
Yeah, will switch to daytime pyro when we're all out for 4 hours or more too!
jweiss.io
Johannes Weiss @jweiss.io · 3d
Isn't that too beautiful? PM2.5 of an overnight pyrolytic oven clean starting at 1am.

Still woke up at 3am on account of bad air, despite closed doors and open windows in kitchen...
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Reposted by Johannes Weiss
0xtim.bsky.social
Tim Condon @0xtim.bsky.social · 5d
It's been an incredible year for the conference. We had attendees from 6(!) continents come together for an amazing 3 days of workshops, talks and meeting each other face to face. Thank you to all the volunteers and speakers, it's been truly special
serversideswift.info
ServerSide.swift @serversideswift.info · 5d
2025 - that's a wrap

#swiftlang
#serversideswift2025
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Reposted by Johannes Weiss
tracymiranda.bsky.social
Tracy Miranda @tracymiranda.bsky.social · 5d
The new Swift configuration API makes the most of Swift's type checking and expressivity to make it eady to solve common config tasks. @czechboy0.dev walks us through its features @serversideswift.info

forums.swift.org/t/introducin...
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Reposted by Johannes Weiss
serversideswift.info
ServerSide.swift @serversideswift.info · 5d
2025 - that's a wrap

#swiftlang
#serversideswift2025
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Reposted by Johannes Weiss
doozmen.bsky.social
Stijn Willems @doozmen.bsky.social · 5d
If a team that lived in C and Go can build production container infrastructure in Swift, the language is ready for serious server-side systems work. - Eric Ernst, Apple #swiftlang #serversideSwift2025

github.com/apple/contai...
GitHub - apple/container: A tool for creating and running Linux containers using lightweight virtual machines on a Mac. It is written in Swift, and optimized for Apple silicon.
A tool for creating and running Linux containers using lightweight virtual machines on a Mac. It is written in Swift, and optimized for Apple silicon. - GitHub - apple/container: A tool for creati...
github.com
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jweiss.io
Johannes Weiss @jweiss.io · 5d
Thank you 🙈. Dunno what happened, I did tap the handle completion suggestion but didn't appear to work
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jweiss.io
Johannes Weiss @jweiss.io · 5d
@serversideswift.info
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jweiss.io
Johannes Weiss @jweiss.io · 5d
#ServerSideSwift was so great. Fantastic to (re)connect with people from literally all over the world.

Loved the very positive energy and the buzz around all the new stuff & maturity refinements around the existing tech.

Most importantly thank you @0xtim for putting up this amazing show again!
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jweiss.io
Johannes Weiss @jweiss.io · 13d
#NegativeWaste, really :)
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jweiss.io
Johannes Weiss @jweiss.io · 13d
Dropped my last coffee beans on the floor this morning. Was desperate enough that I picked them all up and made a coffee. Guess it's 99% arabica & 1% random dirt 🙈
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Reposted by Johannes Weiss
sebsto.bsky.social
Seb in the cloud ☁️ @sebsto.bsky.social · 14d
Ever wonder how to write safe and fast code to run on your server ?
Ever considered the open source Swift programming language ?

Maybe it's time
The Growth of the Swift Server Ecosystem
Nearly ten years ago, Swift was open sourced and an official runtime for Linux was released. I’ve been involved with Swift on the server since almost the very beginning, originally picking it up as a way to use a language I really enjoyed for backend development. In that time Swift has come a long way, with stability across platforms, a burgeoning ecosystem and many success stories. It’s matured into a great option for highly-scalable server applications, websites, and lambdas. In this post, I’ll cover how Swift:
www.swift.org
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Reposted by Johannes Weiss
serversideswift.info
ServerSide.swift @serversideswift.info · 17d
The conference has always been about bringing the community together and growing Swift on the server. So to help, we're dropping the price of the beginner workshop to just £25! This workshop from Apple will teach you everything you need to get going!

Tickets - www.serversideswift.info/tickets/
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jweiss.io
Johannes Weiss @jweiss.io · 19d
Thanks. Entirely fair!
So the suggested issue is that an existing H1B could be flagged as suspended until payment arrives. And if that were the case this would indeed be a huge issue at the border.

Get it, totally fair to point out that uncertainty around this is awful, esp for folks travelling rn.
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jweiss.io
Johannes Weiss @jweiss.io · 19d
:( where can I learn more? I completely follow the impact on the tech industry and ofc future visa prospects. What I don't understand yet is the impact on existing visa holders who are travelling at the moment.
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Reposted by Johannes Weiss
swift.org
Swift Language @swift.org · 22d
Swift 6.2 is here, including so much 🆕🥳:
⏩Approachable concurrency
🦺Opt-in strict memory safety
📦WebAssembly support
🏃Faster build perf for macros
🐞Enhanced async debugging
📚Inline stack-based arrays
🚇Subprocess support
🧪Test result attachments
www.swift.org/blog/swift-6...
Swift 6.2 Released
We’re excited to announce Swift 6.2, a release aimed at making every Swift developer more productive, regardless of where or how you write code. From improved tooling and libraries to enhancements in ...
www.swift.org
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Reposted by Johannes Weiss
swift.org
Swift Language @swift.org · 21d
With ✨Swift 6.2 ✨, you can now target WebAssembly, including WASI support. Get started here: www.swift.org/documentatio... #Wasm
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jweiss.io
Johannes Weiss @jweiss.io · 22d
Who else is going to #ServerSideSwift? Two weeks to go, can't wait to hear what y'all have been up to!

To make the deal even sweeter, I hear there's tasty 15% off discount code for www.serversideswift.info/tickets/: COMMUNITY15
Tickets | ServerSide.swift Conference
ServerSide.swift - the conference for server-side Swift developers
www.serversideswift.info
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jweiss.io
Johannes Weiss @jweiss.io · 28d
Yup! I confused a lot of people when I used the UK version in a meeting a few months ago 😛
davidho.bsky.social
David Ho @davidho.bsky.social · 28d
It’s very confusing that “to table something” has the opposite meaning in the US and UK. 😵‍💫
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jweiss.io
Johannes Weiss @jweiss.io · Sep 5
🤩
modacitylife.com
Melissa & Chris Bruntlett @modacitylife.com · Sep 5
When it comes to seamlessly integrating the bike and train, proximity of parking to the platform is everything, with Dutch railways dictating the walk not exceed four minutes. Which is why Tilburg Station has built two bike parking facilities totalling 7,500 spaces—one on either side of the tracks.🧵
Photographs of a two-storey, beautifully designed and brightly-lit bike parking facility outside Tilburg railway station that contains about 3,500 spaces organised in two-tiered racks. Photographs of a two-storey, beautifully designed and brightly-lit bike parking facility outside Tilburg railway station that contains about 3,500 spaces organised in two-tiered racks. Photographs of a two-storey, beautifully designed and brightly-lit bike parking facility outside Tilburg railway station that contains about 3,500 spaces organised in two-tiered racks. Photographs of a two-storey, beautifully designed and brightly-lit bike parking facility outside Tilburg railway station that contains about 3,500 spaces organised in two-tiered racks.
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Reposted by Johannes Weiss
rahmstorf.bsky.social
Prof. Stefan Rahmstorf @rahmstorf.bsky.social · Aug 30
Wow. Check this out.
Politicians actually trying to solve problems can achieve a lot!
www.washingtonpost.com/climate-solu...
Paris said au revoir to cars. Air pollution maps reveal a dramatic change.
Air pollution fell substantially as the city restricted car traffic and made way for parks and bike lanes.
www.washingtonpost.com
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Reposted by Johannes Weiss
swift.org
Swift Language @swift.org · Aug 5
Need a fast key/value datastore? The portfolio of Swift packages for building high-performance internet-scale services grew further this week with the preview of Valkey support: valkey.io/blog/valkey-...
Valkey · Introducing valkey-swift, the Swift client for Valkey
The new Swift client for Valkey is now in preview. Learn about its features and how it brings the performance of Valkey to the Swift language.
valkey.io
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Reposted by Johannes Weiss
heckj.bsky.social
Joseph Heck @heckj.bsky.social · Aug 4
Very excited to see the first cut of github.com/valkey-io/va..., which supports really lovely structured concurrency integration for accessing the client, pipelining commands, mixing that with transactions, and more! #swiftlang #valkey
GitHub - valkey-io/valkey-swift: Valkey client written in Swift
Valkey client written in Swift. Contribute to valkey-io/valkey-swift development by creating an account on GitHub.
github.com
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