2026-09-15 20:54 UTC
To diagnose performance issues caused by the structure of ForEach content in SwiftUI's List and lazy stacks, we can enable slow-path logging in Xcode. My new post shows how to set it up, interpret the diagnostic messages, and address the reported issues: https://nilcoalescing.com/blog/DiagnosingForEachPerformanceIssuesInSwiftUILazyContainers/
#iOSDev #SwiftUI
Replies (1)
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@alexsteinerde@mastodon.social 2026-10-03 14:04
@natpanferova@mastodon.social Great article. I could optimize some lists with that. But one error log I see a lot is the following one. I could narrow it down to the first-party UIBarButtonItem. Do you have any idea how to work around that? Unable to determine number of views per element in the collection Array. If this view only produces one view per element in the collection, consider wrapping views in a VStack to take the fast path.