TTID/TTFD for SwiftUI

[kahest]

Problem Statement

What it says on the tin. :)

Please upvote if this is important to you.

Solution Brainstorm

Might/will require introducing new APIs to call manually

Tasks

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1. Implementation: feat: SwiftUI time for initial display and time for full display #4596
2. Support for sentryTrace: Add a waitForFullDisplay parameter to the sentryTrace() SwiftUI modifier #4787
3. Mark as experimental in code
4. Docs (see TTID/TTFD for SwiftUI #4162 (comment))
5. TBD: Add feature usage tracking?

[kahest]

relevant docs pages:

• https://docs.sentry.io/platforms/apple/guides/ios/features/experimental-features/
• https://docs.sentry.io/platforms/apple/guides/ios/tracing/instrumentation/automatic-instrumentation/#time-to-initial-display
• https://docs.sentry.io/platforms/apple/guides/ios/tracing/instrumentation/automatic-instrumentation/#time-to-full-display
• https://docs.sentry.io/platforms/apple/guides/ios/tracing/instrumentation/swiftui-instrumentation/