SwiftUI Performance Audit

Overview

SwiftUI is slow in two ways. Either one update takes too long (a body, a layout pass or an image decode that does not fit in a frame), or there are too many updates (views recomputed because something they depend on changed, although nothing they show did). Both end as work on the main thread, and the person sees a frozen control or stuttering motion. An audit names which of the two is happening, on which view, caused by which dependency or call, and proves the fix with the same measurement taken before and after. Guessing from code alone is allowed as a first pass, but it must be labelled as a hypothesis until a trace confirms it.

Instructions

1. Name the symptom and the conditions

Ask for, or find in the report: the exact interaction (for example "typing in the search field on Orders"), device model and OS version, build configuration, how much data is on screen, and whether it was always slow or regressed.