Breno Xavier — Blog https://brenoxp.com/blog Writing on AI tooling, native apps, and platform engineering. en Real-time Whisper on-device: chunk size, VAD, and quantization, with numbers https://brenoxp.com/blog/real-time-whisper-on-device https://brenoxp.com/blog/real-time-whisper-on-device Tue, 01 Sep 2026 12:00:00 GMT Benchmarking whisper.cpp for live meeting transcription on Apple Silicon: the ~1.6s latency floor, why VAD is a 28% win, why q5_0 is free, and why CoreML wasn't worth it. When SwiftUI stops being enough: rebuilding a chat message list in UIKit https://brenoxp.com/blog/swiftui-to-uikit-message-list https://brenoxp.com/blog/swiftui-to-uikit-message-list Tue, 01 Sep 2026 12:00:00 GMT Why a chat list in a shipping iOS app moved from ScrollView to a y-inverted UICollectionView: the scroll geometry SwiftUI won't give you, the four animation systems you have to silence separately, and a keyboard bug that took four attempts.