Johannes Weiss
@jweiss.io
Computer programmer (http://github.com/weissi). Distributed systems, ML infrastructure/eval, Swift, previously #SwiftNIO — ♥ snowboarding
London, UK
London, UK
Quite a few groups seem to be rather successful making many of us believe the opposite.
So please note! Some things are getting meaningfully better.
So please note! Some things are getting meaningfully better.
London’s homicide rate drops to lowest in more than a decade
London’s homicide rate drops to lowest in more than a decade
Sadiq Khan says ‘public health’ approach has made the capital one of the safest cities in the western world
London’s murder rate has dropped to its lowest in more than a decade with police in the capital and the mayor saying it is now one of the safest cities in the western world.
The figures come as those on the radical right criticise the city for having a crime problem, hoping to gain politically from such claims being believed. Continue reading...
www.theguardian.com
January 12, 2026 at 11:49 AM
Quite a few groups seem to be rather successful making many of us believe the opposite.
So please note! Some things are getting meaningfully better.
So please note! Some things are getting meaningfully better.
Reposted by Johannes Weiss
FOSDEM, the legendary open source gathering in Brussels, is coming soon, and we'd love to see you there! We've got multiple talks on Swift plus a pre-FOSDEM community meetup. Whether you're a longtime attendee or new to the event, come say hi! 👋 swiftlang.github.io/event-fosdem/ #FOSDEM
Swift @ FOSDEM 2026
swiftlang.github.io
January 9, 2026 at 7:05 PM
FOSDEM, the legendary open source gathering in Brussels, is coming soon, and we'd love to see you there! We've got multiple talks on Swift plus a pre-FOSDEM community meetup. Whether you're a longtime attendee or new to the event, come say hi! 👋 swiftlang.github.io/event-fosdem/ #FOSDEM
Reposted by Johannes Weiss
Happy New Year, @swift.org crew! So happy to be back, I hope everyone enjoyed some time off.
If you're looking to catch up on Swift news, check out the December digest: www.swift.org/blog/whats-n... and let me know what you think!
If you're looking to catch up on Swift news, check out the December digest: www.swift.org/blog/whats-n... and let me know what you think!
What's new in Swift: December 2025 Edition
Welcome to the latest digest of news from the Swift project.
www.swift.org
January 2, 2026 at 7:15 AM
Happy New Year, @swift.org crew! So happy to be back, I hope everyone enjoyed some time off.
If you're looking to catch up on Swift news, check out the December digest: www.swift.org/blog/whats-n... and let me know what you think!
If you're looking to catch up on Swift news, check out the December digest: www.swift.org/blog/whats-n... and let me know what you think!
What should we call wholewheat (partially rye?) bread?
I guess only Germans like that, so let's go with 'German bread' 😅.
It's really yummy btw!
I guess only Germans like that, so let's go with 'German bread' 😅.
It's really yummy btw!
December 31, 2025 at 8:59 AM
What should we call wholewheat (partially rye?) bread?
I guess only Germans like that, so let's go with 'German bread' 😅.
It's really yummy btw!
I guess only Germans like that, so let's go with 'German bread' 😅.
It's really yummy btw!
👏 Super cool to get Swift on the server showcased at reInvent
🏎️ While Swift was originally created for iOS/macOS apps, many might not realize that at Apple we run Swift on the server to operate massive services, on Linux, serving billions of requests per day. Check out our VP's keynote at AWS re:Invent for details youtu.be/JeUpUK0nhC0?...
AWS re:Invent 2025 - Keynote with Peter DeSantis and Dave Brown
YouTube video by AWS Events
youtu.be
December 6, 2025 at 9:36 AM
👏 Super cool to get Swift on the server showcased at reInvent
Reposted by Johannes Weiss
🎉 10 years of open source Swift! A decade ago today, we opened Swift to the world with a simple blog post: swift.org/blog/welcome
What's grown since—thanks to an incredible community of contributors—has been extraordinary. Here's to the next ten years. 🧡
What's grown since—thanks to an incredible community of contributors—has been extraordinary. Here's to the next ten years. 🧡
December 4, 2025 at 12:08 AM
🎉 10 years of open source Swift! A decade ago today, we opened Swift to the world with a simple blog post: swift.org/blog/welcome
What's grown since—thanks to an incredible community of contributors—has been extraordinary. Here's to the next ten years. 🧡
What's grown since—thanks to an incredible community of contributors—has been extraordinary. Here's to the next ten years. 🧡
Reposted by Johannes Weiss
We'd be happy to see you at the inaugural Swift for Wasm Community Hour on 3rd of December! More details in this post on Swift Forums: forums.swift.org/t/swift-for-...
Swift for Wasm Community Hour (3rd of December 2025)
I'm excited to announce the inaugural Swift for Wasm Community Hour! We welcome everyone at this event, no matter your background or experience. This is an open space to ask questions and to learn fr...
forums.swift.org
November 21, 2025 at 11:57 AM
We'd be happy to see you at the inaugural Swift for Wasm Community Hour on 3rd of December! More details in this post on Swift Forums: forums.swift.org/t/swift-for-...
Reposted by Johannes Weiss
⚙️ Swift progress on embedded Swift, for memory-safe, fast code in resource-constrained environments. The latest updates are coming to Swift 6.3, and you can read more here: www.swift.org/blog/embedde... #IoT
November 17, 2025 at 9:29 PM
⚙️ Swift progress on embedded Swift, for memory-safe, fast code in resource-constrained environments. The latest updates are coming to Swift 6.3, and you can read more here: www.swift.org/blog/embedde... #IoT
Kagi is trying that: blog.kagi.com/slopstop
Introducing SlopStop: Community-driven AI slop detection in Kagi Search | Kagi Blog
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Your collective defense against AI-generated spam and content farms
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blog.kagi.com
November 16, 2025 at 9:26 PM
Kagi is trying that: blog.kagi.com/slopstop
Yes!? I don't understand it either. Seems actively bad unless there are situations where there's no other solution.
November 14, 2025 at 12:06 PM
Yes!? I don't understand it either. Seems actively bad unless there are situations where there's no other solution.
Reposted by Johannes Weiss
Ever since the parliamentary wars of Brexit, the UK media and Westminster bubble craving for drama seems to have increased exponentially.
What is technically still a relatively 'new' Labour government with a huge absolute majority is already (portrayed?) as fighting with its lasts gasps.
What is technically still a relatively 'new' Labour government with a huge absolute majority is already (portrayed?) as fighting with its lasts gasps.
🚨Labour chaos latest:
🔥 Starmer allies accuse Streeting of plotting
🔥 Streeting says "categorically untrue"
🔥 Splits in No10 over high-stakes gamble
🔥 Labour MPs furious
🔥 Government source: "Number ten has gone into full bunker mode"
Story 👇
www.huffingtonpost.co.uk/entry/cabine...
🔥 Starmer allies accuse Streeting of plotting
🔥 Streeting says "categorically untrue"
🔥 Splits in No10 over high-stakes gamble
🔥 Labour MPs furious
🔥 Government source: "Number ten has gone into full bunker mode"
Story 👇
www.huffingtonpost.co.uk/entry/cabine...
Cabinet Splits Erupt As Keir Starmer Allies Accuse Wes Streeting Of Plotting Against Him
Labour MPs left furious by latest bout of party infighting.
www.huffingtonpost.co.uk
November 12, 2025 at 7:08 AM
Ever since the parliamentary wars of Brexit, the UK media and Westminster bubble craving for drama seems to have increased exponentially.
What is technically still a relatively 'new' Labour government with a huge absolute majority is already (portrayed?) as fighting with its lasts gasps.
What is technically still a relatively 'new' Labour government with a huge absolute majority is already (portrayed?) as fighting with its lasts gasps.
Very cool to see AWS and the Swift community work on this together aws.amazon.com/blogs/openso...
The Swift AWS Lambda Runtime moves to AWSLabs | Amazon Web Services
We’re excited to share that the Swift AWS Lambda Runtime project has officially moved to the AWS Labs organization. You can now find it here: 👉 https://github.com/awslabs/swift-aws-lambda-runtime This...
aws.amazon.com
November 6, 2025 at 6:56 PM
Very cool to see AWS and the Swift community work on this together aws.amazon.com/blogs/openso...
www.cat.com
November 6, 2025 at 7:48 AM
Cat's marketing department is ... something. Seems like they're making gas turbines in a facility they call "Solar Turbines". Under the Oil & Gas category, of course.
November 6, 2025 at 7:48 AM
Cat's marketing department is ... something. Seems like they're making gas turbines in a facility they call "Solar Turbines". Under the Oil & Gas category, of course.
Reposted by Johannes Weiss
Observability is the key to understanding how your system performs and where problems are occurring. Moritz Lang and Si Beaumont gives us the run down on how it works in Swift!
www.youtube.com/watch?v=HSxI...
www.youtube.com/watch?v=HSxI...
Observability in Server-Side Swift - Si Beaumont & Moritz Lang
🎥 Recorded at the ServerSide.swift conference in London in 2025.
🙌 Sponsored by Broken Hands: https://www.brokenhands.io
🐥 Twitter: https://twitter.com/swiftserverconf
🐘 Mastodon:…
www.youtube.com
November 5, 2025 at 4:02 PM
Observability is the key to understanding how your system performs and where problems are occurring. Moritz Lang and Si Beaumont gives us the run down on how it works in Swift!
www.youtube.com/watch?v=HSxI...
www.youtube.com/watch?v=HSxI...
Reposted by Johannes Weiss
Nice writeup about plans wrt. the #swift typechecker by @[email protected]
Roadmap for improving the type checker
Roadmap for improving the type checker In the past, we've released various "manifestos" and "roadmaps" to discuss planned improvements to the language. This post is also a roadmap of sorts, but instead, the focus is on the implementation rather than user-visible language changes (however, I will briefly mention a few potential language changes at the very end). Specifically, I'm going to talk about some work we are doing to improve expression type checking in the Swift compiler. This includes c...
forums.swift.org
October 30, 2025 at 10:47 PM
Nice writeup about plans wrt. the #swift typechecker by @[email protected]
Reposted by Johannes Weiss
A post from @joannis on the #Swift blog about the new preview of the Android SDK for Swift
www.swift.org/blog/nightly...
www.swift.org/blog/nightly...
Announcing the Swift SDK for Android
Swift has matured significantly over the past decade — extending from cloud services to Windows applications, browser apps, and microcontrollers. Swift powers apps and services of all kinds, and thank...
www.swift.org
October 24, 2025 at 9:33 PM
A post from @joannis on the #Swift blog about the new preview of the Android SDK for Swift
www.swift.org/blog/nightly...
www.swift.org/blog/nightly...
Good luck!! And thank you
October 12, 2025 at 8:52 PM
Good luck!! And thank you
Do you have an FB number with the crash report attached? Possibly even a repro you can share?
October 6, 2025 at 7:29 PM
Do you have an FB number with the crash report attached? Possibly even a repro you can share?
Made a little thing that may help you profile your services from within their own process -- no extra privileges or tools required.
New tooling for profiling performance-critical services with Swift -- introducing the Swift Profile Recorder. More here: www.swift.org/blog/swift-p...
October 6, 2025 at 7:24 PM
Made a little thing that may help you profile your services from within their own process -- no extra privileges or tools required.
Yeah, will switch to daytime pyro when we're all out for 4 hours or more too!
October 6, 2025 at 5:39 PM
Yeah, will switch to daytime pyro when we're all out for 4 hours or more too!
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...
Still woke up at 3am on account of bad air, despite closed doors and open windows in kitchen...
October 6, 2025 at 6:37 AM
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...
Still woke up at 3am on account of bad air, despite closed doors and open windows in kitchen...
Reposted by Johannes Weiss
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
October 3, 2025 at 9:30 PM
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
Reposted by Johannes Weiss
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...
forums.swift.org/t/introducin...
October 3, 2025 at 3:29 PM
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...
forums.swift.org/t/introducin...
Reposted by Johannes Weiss
October 3, 2025 at 4:30 PM