The Profiler in Unity 2017.2.0b6 shows that manually syncing transforms, once per update, is slower than the Physics system performance in earlier Unity builds, such as 2017.1.1p1. According to the Physics.autoSyncTransforms information I could find, one reason to introduce this new API in 2017.2 is to provide a way to help to improve performance. However, my tests show that physics performance is worse in both cases, with autoSyncTransforms enabled and disabled, compared to Unity 2017.1.1p1. Manually syncing transforms (using Physics.autoSyncTransforms=false and Physics.SyncTransforms()) is about 1ms slower than the physics system in 2017.1.1p1 in my tests. 2017.2.0b6 - CPU time between 2.6ms - 5.0ms by average 2017.1.1p1 - CPU time between 2.3ms - 4.3ms by average Please see the video attached to the bug-report. Spoiler: Video Reproduce Open user attached project Open Assets/Scene.unity Open Window/Profiler Press Play Write down CPU time. Repeat these steps with Unity 2017.1 and observe 2017.2.0b6 is slower. Expected Physics should not be slower than in a previous version.