Christian Selig

I wanted to play around with the iOS camera API today, and I see weird behavior where the first capture takes much longer than subsequent

Is this inescapable? Is there a way to fix this?

Tried:

- Release mode
- setPreparedPhotoSettingsArray
- Different device and iOS version
- Dispatch queues
- Priming with a "fake capture" and just not using it (gross, triggers shutter sound)

Code: https://gist.github.com/christianselig/70bc09dfb5ffd54aa1d37a8150813d73

Aug 12, 2025 at 6:04pmWeb
Show threadFinn VoorheesAug 12, 2025
@christianselig I’ve seen the same thing with starting video capture, but it doesn’t seem to happen with release builds
Show threadChristian SeligAug 12, 2025
@finnvoorhees Dang, I wish I saw the same, seems to still be happening to me with release mode. To be clear, are you just setting the build config to Release under schemes?
Show threadFinn VoorheesAug 12, 2025
@christianselig can’t remember if it was the build config or just not attaching the debugger that fixed it, but one of them did
Show threadchris overcashAug 12, 2025
@christianselig feels like a @sandofsky question…
Show threadpimAug 13, 2025
@christianselig have you tried capturing without having the debugger attached? with video capture the first capture hangs a bit for some reason, but only when running directly from Xcode
Show threadChristian SeligAug 13, 2025
@pimc Yeah it definitely speeds things up but is not a groundbreaking change unfortunately
Show threadAvadheshAug 21, 2025
@christianselig What's up with the white prohibition sign on the app icon? I also sometimes see it in the same place when running the app from Xcode.