gpu instancing performance issue

Unity Engine
1

i test this coin example : GPU Instancing page-6, when i enable the instance function, the fps drop…this is bug?

3240383--249099--instance1.jpg
3240383--249099--instance1.jpg2880×1666 551 KB
3240383--249100--instance2.jpg
3240383--249100--instance2.jpg2880×1666 555 KB

2

Try to disable dynamic batching to see if it is batching that makes non instanced faster.

3

It seems not make sense .

4

Dynamic batching costs cpu time and is tailored so that in general, it should cost a little bit less time than the draw calls it saves.

It’s not free to use. So if instancing does even less CPU time (at cost of GPU time) and you need to save CPU time then turning off Dynamic batching when you are instancing becomes potentially faster.

So it does make sense but only if you need to save CPU time.

Or it might be a bug :slight_smile:

5

Instanced Indirect is probably the best solution for this. You upload all the instance info to a compute buffer and render from that.

6

Can u test the example, thanks in advance![ https://discussions.unity.com/t/610675 page-6]( https://discussions.unity.com/t/610675 page-6,)

7

this will work in opengl es3,no compute buffer