This is a crosspost from the physics thread - I was encouraged to repost it here. After updating to 2018.3.0b3, I had a very severe slowdown of about 2 orders of magnitude when doing physics queries. 2018.2: View attachment 310123 2018.3: View attachment 310126 Physics calls seem to go from ~0.02ms to ~1ms. Checked Physics.BoxCastNonAlloc, Physics.SphereCastNonAlloc, Physics.Raycast, Physics.RaycastNonAlloc and Physics.OverlapCapsuleNonAlloc. There are 10s of thousands of colliders in the scene. I tried disabling Auto Sync Transforms with very little improvement. Case 1086484 is a reupload with everything except level loading, physics-related colliders and a single system with a box cast stripped out to hopefully isolate the issue as much as possible.