Month: September 2026

The Performance Regression You Didn’t Profile For Last quarter, a team I was advising shipped what looked like an innocent feature: a local cache of Document structs, each containing an array of Section structs, each containing an array of Paragraph structs. Three layers of value types, each with its own Array storage. The team assumed

Profiling a Swift app means measuring where your code actually spends time, memory, energy, and I/O, then using that evidence to make targeted changes. It sits next to related disciplines like benchmarking, tracing, and performance regression testing. If you ship production iOS, macOS, watchOS, or tvOS apps, profiling isn’t a final polish step. It’s how