Software Engineerhttps://rafalsroka.com/https://rafalsroka.com/posts/llm-context-window-attention/https://rafalsroka.com/posts/llm-context-window-attention/A deep dive into how LLMs manage context through attention mechanisms, and the engineering tricks that push context windows past their quadratic limits.Sat, 09 May 2026 23:00:00 GMThttps://rafalsroka.com/posts/swiftui-architecture/https://rafalsroka.com/posts/swiftui-architecture/SwiftUI is not a black box replacement for UIKit. It's a view graph diffing engine that runs on top of UIKit and AppKit. Here's how it actually works.Fri, 08 May 2026 00:00:00 GMThttps://rafalsroka.com/posts/swift-copy-on-write/https://rafalsroka.com/posts/swift-copy-on-write/Swift's value types avoid expensive copies until you actually mutate them. Here's how CoW works under the hood.Thu, 07 May 2026 23:00:00 GMThttps://rafalsroka.com/posts/how-llms-know-when-to-stop/https://rafalsroka.com/posts/how-llms-know-when-to-stop/LLMs don't 'feel' done. They stop because the math tells them to. Here's how.Wed, 06 May 2026 23:00:00 GMThttps://rafalsroka.com/posts/ios-testing-best-practices/https://rafalsroka.com/posts/ios-testing-best-practices/Tests are automated. Run often. Preferably on each commit or pull request to quickly catch regressions.Thu, 20 Oct 2022 21:01:00 GMThttps://rafalsroka.com/posts/ios-reference-cycles/https://rafalsroka.com/posts/ios-reference-cycles/Strong reference cycles prevent instances from ever being deallocated, causing a memory leak.Tue, 20 Sep 2022 21:01:00 GMThttps://rafalsroka.com/posts/ios-concurrency/https://rafalsroka.com/posts/ios-concurrency/iOS offers several ways to run tasks concurrently. This article is a short summary of them.Mon, 19 Sep 2022 21:01:00 GMThttps://rafalsroka.com/posts/low-memory-ios/https://rafalsroka.com/posts/low-memory-ios/How crash reporting tools work.Sun, 10 Jan 2016 21:01:00 GMThttps://rafalsroka.com/posts/spritekit-coordinate-system/https://rafalsroka.com/posts/spritekit-coordinate-system/Differences between SKScene and SKNode when it comes to coordinate system in SpriteKit.Tue, 10 Nov 2015 21:01:00 GMThttps://rafalsroka.com/posts/idfa/https://rafalsroka.com/posts/idfa/An alphanumeric string unique to each device, used only for serving advertisements.Mon, 10 Aug 2015 21:01:00 GMThttps://rafalsroka.com/posts/motion-manager-noise-reduction/https://rafalsroka.com/posts/motion-manager-noise-reduction/A way to smooth the accelerometer readings using a Low Pass Filter.Tue, 14 Jul 2015 21:01:00 GMThttps://rafalsroka.com/posts/sounds-in-spritekit/https://rafalsroka.com/posts/sounds-in-spritekit/A couple of tips and tricks and useful code snippets for playing sounds.Fri, 10 Apr 2015 21:01:00 GMThttps://rafalsroka.com/posts/nsrunloop/https://rafalsroka.com/posts/nsrunloop/An event processing loop that you use to schedule work and coordinate the receipt of incoming events.Wed, 09 Apr 2014 21:01:00 GMThttps://rafalsroka.com/posts/mvc-design-pattern-ios/https://rafalsroka.com/posts/mvc-design-pattern-ios/Model-view-controller concept in the iOS world.Sun, 25 Dec 2011 21:01:00 GMT