Hello Babylon team! I ran into a strange issue, where the frame rate drops significantly in the following scenario on iOS15:
- Import a geometry and create several instances of it
- Add the instances under a parent (e.g. a box geometry)
- Scale the parent to 0
At that point the frame rate drops a lot. On older Apple devices, with older iOS, the frame doesn’t drop at all.
Here’s the playground that I used to replicate the issue, let’s call it (1):
https://playground.babylonjs.com/#SM5RNH#24
Here is a playground where the issue can not be replicated. The only difference is that the scaling of the parents is 1, let’s call it (2):
https://playground.babylonjs.com/#SM5RNH#23
Photos from the issue being replicated:
This is a photo of playground(2). On the left, the older device has lower frame rate, which is expected. The scaling is 1 so there is no issue here.
This is a photo of playground (1). On the left, the older device with iOS 13 has more or less the same frame rate. The device with iOS 15 though drops to 4 fps.
Let me know what you think about this!
