Matthew Cassinelli
57.4K posts

Matthew Cassinelli
@mattcassinelli
Siri/Apple Intelligence expert & App Intents consultant. Prev. team at Workflow before @Apple’s Shortcuts. Follow my feed: @cassinellimedia. Get my shortcuts 👇





@9to5mac @apollozac Of the many dumb decisions favored by Apple, making leading edge development tools unviable on iOS and iPadOS is the dumbest. They are cutting off an entire generation from early exploratory development. Shame on Apple for abandoning the ethos of Woz.

I agree. That’s why we’ve been working on something for this… dropping v soon

voice in, text out feels like the most natural interface right now










Introducing the Readwise CLI. Anything you've saved in Readwise (highlights, articles, PDFs, books, youtube, newsletters) is now instantly accessible from the terminal. For you, and your AI agents. npm install -g @readwise/cli






CPU and thermal performance in a SwiftUI list explains why we had so many hitches. Even at rest, no scrolling, the CPU screamed at 100% capacity to render every gif, and well past 100% (distributing work across CPU cores) when I scrolled. The “Very High” energy impact rapidly heated my device. The measured thermal trace crept up towards Serious. When I wasn’t paying attention, the app was even killed by the OS, presumably hitting a critical thermal spike. After giving a serious beating to my shiny new A19 chip, the same feed in UIKit produced comparatively nearly trivial CPU and energy usage. * At rest, UIKit dropped as low as 11% CPU utilisation, vs a consistent 100% for the SwiftUI version * Energy usage correspondingly held at High for UIKit, vs Very High for SwiftUI. I gave up waiting for the thermal profile to hit Fair after 3 minutes. Read my scientific performance comparison right here 🧪 blog.jacobstechtavern.com/p/swiftui-vs-u…





