Advanced Swift Concurrency: Launch Speed Optimisation You can parallelise app launch work in didFinishLaunchingWithOptions using a GCD DispatchGroup to wait and Swift's taskGroup to parallelise steps This avoids performing all critical work serially on the main thread - but use this with caution - any main-thread isolated work can deadlock if you don't understand what you're doing.

Advanced iOS Thread APIs: Who needs Crashlytics?! There’s a fun Thread API that has no analogy in Swift Concurrency, and it’s one of my favourites: Thread.callStackSymbols. It logs the call stack of the thread. This is actually how your favourite crash reporting tooling works under the hood to get crash traces! Read my full blog post in my first reply: blog.jacobstechtavern.com/p/…