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Third Party Issue
Votes
0
Found in [Package]
1.1.4
Issue ID
AVPB-459
Regression
No
[VisionOS] Certain number of cubes cause FPS to drop on Vision Pro
Reproduction steps:
1. Open the attached “Repro“ project
2. Build the project on “visionOS” platform (File > Build Settings > visionOS > Build)
3. Run the project on Apple Vision Pro device
4. Connect Unity Profiler
5. Instantiate 2500 Cubes using the buttons on the screen
6. Observe Unity Profiler
Expected result: No sudden FPS drops are present
Actual result: After a certain point FPS tanks from 90 to 45
Reproducible with: 1.1.4 (2022.3.20f1)
Reproducible on: MR on Apple Vision Pro - built using M2 Pro macOS 14.2.1 (user’s platform)
Not reproducible on: MR on visionOS 1.1 Simulator - built using M1 Max macOS 14.4.1
Note: This issue was not successfully reproduced by CQA, thus submitted without local reproduction
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Resolution Note:
This reproduces in a simple non-Unity visionOS app, so we are taking it to be an Apple issue. Whether it's really a bug is debatable: some level of scene complexity will inevitably cause performance to degrade, and doing so at integer divisors of the base FPS (90 to 45) is a conscious decision on Apple's part to ensure update smoothness. Nevertheless, we passed this along to Apple as FB14859759 (along with a non-Unity Xcode project demonstrating the issue).