Checked in to Farringdon (Elizabeth Line), 4 Lindsey St, United Kingdom Yeah, fair enough. See on Swarm
Johannes Weiss
@jweiss.io
Computer programmer (http://github.com/weissi). Distributed systems, ML infrastructure/eval, Swift, previously #SwiftNIO — ♥ snowboarding London, UK
Also, I'm not buying a #Deutschlandticket to save money (I'm 99% it'll cost more) but to avoid the completely inscrutable and most ridiculous apps ever that they force you to use to buy regular tickets. It's just insane, they want your name, address and an account to buy a single tram ticket there.
Johannes Weiss@jweiss.io · last wk.Buying a #Deutschlandticket is the most German thing ever. You need a passport + selfie style ID verification to buy a _train ticket_. In Britain, I could get a mortgage with less scrutiny and hassle...
Buying a #Deutschlandticket is the most German thing ever. You need a passport + selfie style ID verification to buy a _train ticket_. In Britain, I could get a mortgage with less scrutiny and hassle...
Solar's sharp rise continues. As of April 2026, global solar capacity now exceeds 3 terawatt. 1 gigawatt → 1 terawatt: 20+ years 1 terawatt → 2 terawatt: 33 months 2 terawatt → 3 terawatt: 19 months
What a night for England. You could hear London roar in the dark. Quarter-finals, here we come. ⚽
NEW BLOG FOR YOU Google's energy consumption numbers in their new climate report are mind-blowing. 2 years ago they flipped from linear to exponential growth, and their climate impact is blowing out, too. A WILD testament to the obscene bloat and waste of GenAI: ketanjoshi.co/2026/07/01/g...
HUGE launch! AWS Lambda MicroVMs - Isolated virtual machines which can run tasks or sessions up to 8 hours. It’s like Lambda and Fargate had a baby, and it inherited the best genes of both. aws-news.com/article/2026...
Run isolated sandboxes with full lifecycle control: AWS Lambda introduces MicroVMs
AWS Lambda introduces MicroVMs, a new serverless compute primitive powered by Firecracker that provides VM-level isolation, rapid launch/resume, and…
aws-news.com
Talk about few lines and big impact: This fix should finally the dreaded "error: '<dep>': Couldn't check out revision '<sha>'" failures seemingly at random when using SwiftPM. github.com/swiftlang/sw...
Tolerate dangling remote-tracking refs on checkout by plemarquand · Pull Request #10172 · swiftlang/swift-package-manager
swift package resolve sometimes fails with: error: '<dep>': Couldn't check out revision '<sha>': fatal: bad object refs/remotes/origin/<branch> even thoug...
github.com
In case you are in the camp of “Andrew Tridgell is vibefucking rsync” please read this.l and adjust your priors. medium.com/@tridge60/rs...
rsync and outrage
I gave up blogging a long time ago (apart from an occasional thing about ArduPilot), I tend to just write code and hope people find it…
medium.com
When you draw a stroke in Goodnotes on the web, you get the exact same curves and ink flow as on iPad, because it’s literally the same Swift code running on both. ✍️ Goodnotes engineer Yuta Saito shares how they built it with Swift and WebAssembly: www.swift.org/blog/bringin...
Ehhm, this cupboard _hinge_ has a website like some cutting-edge tech product. It's quite hilarious actually: www.grass.eu/en/products/...
Tiomos hinge — GRASS
The Tiomos hinge stands for maximum stability, integrated damping and pure design.
grass.eu
It really looks like Anthropic can become profitable this quarter. I did not expect that last year. I think @simonwillison.net got it right: Claude Code & Codex have found product market fit. Enterprises are paying real money now! bsky.app/profile/jwei... simonwillison.net/2026/May/27/...
I think Anthropic and OpenAI have found product-market fit
Anthropic are strongly rumored to be about to have their first profitable quarter. Stories are circulating of companies surprised at how expensive their LLM bills are becoming from usage by …
simonwillison.net
Johannes Weiss@jweiss.io · 2mo agoHmm, isaiprofitable.com is a bit odd. For Anthropic it shows $33B capex, $6.5B revenue which looks unprofitable. But their own sources say "Anthropic confirmed $30 billion in ARR, up from $9 billion at year-end 2025" (www.saastr.com/anthropic-ju...). So looks like they could break even if desired?
New blog post: NHS Goes To War Against Open Source https://shkspr.mobi/blog/2026/05/nhs-goes-to-war-against-open-source/ The NHS is preparing to close nearly all of its Open Source repositories. Throughout my time working for the UK Government - in GDS, NHSX, i.AI, and others - I championed …
NHS Goes To War Against Open Source
The NHS is preparing to close nearly all of its Open Source repositories. Throughout my time working for the UK Government - in GDS, NHSX, i.AI, and others - I championed Open Source. I spoke to dozens of departments about it, wrote guidance still in use today, and briefed Ministers on why it was so important. That's why I'm beyond disappointed at recent moves from NHS England to backtrack on…
shkspr.mobi
Swift 6.3 has landed! 🚀 This release brings community-driven Android support into the official toolchain, along with major improvements to C interoperability, the build system, and embedded Swift. Read more: www.swift.org/blog/swift-6... #AndroidDev #iOSDev
en.wikipedia.org/wiki/The_Inn...
The Innovator's Dilemma - Wikipedia
en.wikipedia.org
Jan Rosenow@janrosenow.bsky.social · 5mo agoWestern carmakers are retreating from EVs just as oil hits $100 a barrel. The parallels with Detroit in the 1980s are striking. They ignored fuel-efficient Japanese cars. Now they’re ignoring Chinese EVs. BYD just unveiled 600-mile range and 250 miles of charge in 5 minutes.
Western carmakers are retreating from EVs just as oil hits $100 a barrel. The parallels with Detroit in the 1980s are striking. They ignored fuel-efficient Japanese cars. Now they’re ignoring Chinese EVs. BYD just unveiled 600-mile range and 250 miles of charge in 5 minutes.
The Swift Performance team isn’t *my* team, but they’re in my hallway. Or in London if you’d prefer. They’re looking for an engineer who’s not afraid of optimizers. jobs.apple.com/en-us/detail...
Swift Compiler Backend Engineer - Jobs - Careers at Apple
Apply for a Swift Compiler Backend Engineer job at Apple. Read about the role and find out if it’s right for you.
jobs.apple.com
This is one of the strangest and most screwed-up stories I’ve worked on. www.londoncentric.media/p/tiktok-lon...
Who's secretly filming fake TikToks inside Londoners' homes?
We tracked down the viral video account invading people's houses to spread false claims about immigrants.
londoncentric.media
Good day! Inspired by thehftguy.com/2026/01/22/d... I took off my phone sockets to check what's behind. Turns out: CAT 5e! Found three separate cables, previously daisy chained. Ordered RJ45 sockets to replace phone sockets and undid daisy chains. Soon Ethernet in the flat, psyched!
Doing Gigabit Ethernet Over My British Phone Wires
Disclaimer: None of this is written by AI, I’m still a real person writing my own blog like its 1999 I finally figured out how to do Gigabit Ethernet over my existing phone wires. Powerline adapter…
thehftguy.com
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.
The Guardian@theguardian.com · 7mo agoLondon’s homicide rate drops to lowest in more than a decade
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
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!
What's new in Swift: December 2025 Edition
Welcome to the latest digest of news from the Swift project.
swift.org
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!
👏 Super cool to get Swift on the server showcased at reInvent
Honza Dvorsky@czechboy0.dev · 8mo ago🏎️ 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?...
🎉 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. 🧡
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