Konrad ‘ktoso’ Malawski
@kto.so
2.3K followers 1.1K following 990 posts
“Life is Study!”; Swift Actors, Concurrency & Distributed Systems @  Previously: Reactive Streams (TCK), @akkateam Actors, HTTP & Streams, @geecon Conference, Java Champion. he/him.
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kto.so
Versailles live in 2017 in a small venue in Yokohama 😊 #music

Even had a glowing rose and a proper VKei suit 🤣 🤘
kto.so
Me right now: pls bro, just one rose fretboard inlay. Pls bro. It's not that expensive. Bro. It's crucial, bro.

This will keep bothering me forever huh
kto.so
Even pochita is telling you to use Swift! #swiftlang
kto.so
Pro tip when trying to relax, maybe don't play the panic inducing Balteus boss music. Yeaaaaaa. Fantastic song, but oh boy does the rhythm get to you 🎶

music.apple.com/jp/album/cont... #music
Reposted by Konrad ‘ktoso’ Malawski
jweiss.io
Made a little thing that may help you profile your services from within their own process -- no extra privileges or tools required.
swift.org
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.
kto.so
Horror gaming starter kit, only for the brave: 🤪
kto.so
There's this dude rewatching all the Macross series and now I can't stop thinking about Frontier 😫 Oh god it was so good, so much great music from it with May'n 🥰🥰🥰
Reposted by Konrad ‘ktoso’ Malawski
sebsto.bsky.social
🚀 Swift AWS Lambda Runtime v2 is out!
Build modern, scalable, and efficient Lambda functions in pure Swift!

Full async/await, response streaming, background tasks, and Swift 6 support.

Release notes & docs: github.com/swift-ser...

#SwiftLang #Serverless #serversideswift2025
Release 2.0.0 · swift-server/swift-aws-lambda-runtime
The AWS Lambda Runtime for Swift v2 is now officially available. Overview Swift AWS Lambda Runtime v2 introduces a complete redesign of the API with async/await-first architecture, response streami...
github.com
Reposted by Konrad ‘ktoso’ Malawski
swift.org
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.
kto.so
Yeah these frameworks take it a step further by doubling down on a workflow as the primary abstraction, not a bad idea
kto.so
Yeah stuff like that has been around for a while, also Microsoft’s “Durable Functions”; weirdly named but same thing. “Agnostic” but you ofc need an impl to call the runtime idiomatically for each language, which this lib is
kto.so
Almost would have left England without having a fish and chips. Fixing it on the airport thankfully 😅
kto.so
Don’t miss the movie when it comes to Europe :-)
kto.so
Really well made, awesome!

This receives the pochita seal of approval:
kto.so
Finished volume 5 of Fire Punch on the train to LHR. What manga, ufff. The twists you think you predicted happen and then there's another and another. Really enjoying it.

You can see how Fujimoto ended up crafting his cinema like style here perfectly.
kto.so
Very sweet config library that'll change how we configure libraries across the ecosystem. No more hardcoded values; easy reloading and overriding etc. @czechboy0 #swiftlang
kto.so
Great status update from Mads about his work on the JNI mode for jextract, for folks who cannot use JDK 22/25;

What a way to finish up summer of code! 🎉 ☀️ #swiftlang #java
kto.so
Official Swift SDKs an docs for swift,
on server, for AWS Bedrock :-) #swiftlang
kto.so
Official @temporalio sdk released at #swiftlang server conference :-)

I always think how this is a direction Akka could have evolved into. Great stuff 👍
kto.so
Moritz and Si presenting about their latest work on swift-otel support. Excited to see it hit 1.0 just recently :-)

Also, built in support to almost all fundamental networking libraries already!
kto.so
Yet another fun adoption story :-)
Fun journey of avoiding complexity and reusing as much Swift as possible in all systems involved in the service #swiftlang
Reposted by Konrad ‘ktoso’ Malawski
swift.org
Swift isn't just for client apps: when Elytra moved from Node to Swift for their server code, they benefited from better performance and a unified codebase. More here: elytra.app/blog/2025/10...
Screenshot of Elytra's RSS reader app.