Hello, our game is using Unity 2020.3.32f1 and Oculus Integration v39.0.0. We found in profiler that with OpenXR backend, OVRManager takes about 2ms CPU every frame on a Quest 1 device, while it only takes about 0.32ms if we switch back to the legacy OVRPlugin with LibOVR and VRAPI backends.
(The profiler data were taken using a new project with only Oculus Integration 39.0 added, and with the sample scene MRC in Oculus/VR/Scenes)
With deep profiling on, we found that it is from OVRP_1_16_0.ovrp_GetControllerState4(). We also found that if we remove the battery in 1 or both Oculus Touch controllers, the time drops (with 1 battery removed, it drops to around half and with both removed, it drops to near 0ms, but of course we can no longer play without controllers).
As a result of this, we can hardly switch to the OpenXR backend due to the FPS requirement in Quest 1.
Anyone knows if I am missing something or is it a problem with the plugin itself? Thank you.