SRP Batcher - Increased CPU rendering times

Unity Engine
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1

Hey there,

I’m currently working on a mobile app I’m trying to optimize for. I was originally concerned that the models were too high in tri count, so I was exploring what I can do with the SRP Batcher to resolve the issue.

I found when using the SRP Batcher the CPU performance was increased dramatically and the performance was overall worse than having it turned off, static batching off and dynamic batching off.

I am wondering if the SRP Batcher isn’t working well because my buildings are built with a lot of meshes, rather than just one mesh for each building. Resulting in more batches?

I also keep seeing negative saved batches. I tried finding out what that means but I couldn’t find a solid answer. I also have about 1731 batches and 10893 saved when NOT using SRP Batcher, and 12692 batches and -1262 saved when using SRP Batcher.

I have attached some images showing performance using the SRPBatcherProfiler.cs I found in another thread.

I’m really struggling with this so any answers would be extremely helpful!

6025391--649997--Screenshot_20200626-192854.jpg
6025391--649997--Screenshot_20200626-192854.jpg1080×1920 324 KB

6025391--650000--Screenshot_20200626-193149.jpg
6025391--650000--Screenshot_20200626-193149.jpg1080×1920 316 KB

2

Hi!
What device model is this?

3

Pixel 1

4

SRP batcher is not guaranteed to be faster on all content on every mobile device - it seems in this particular case it’s not.
The scene doesn’t look too expensive to render in the first place.

5

That’s good to know, but It would also be handy to know why it’s not running well and what I could do to improve it.

In my case I was speculating I was using a lot of meshes and the tri count is high. I feel that reducing the tri count is a given, but does reducing the amount of meshes help at all? The buildings in the scene have been made by reusing a lot of models (See image attached). If I reduced the buildings down to 1 mesh each would that help a lot?

I’ve uploaded some images showing the buildings, and other stats when SRP is turned off and on.

6031007--650870--SRP_Building.PNG
6031007--650873--SRP_OFF.PNG
6031007--650876--SRP_ON.PNG
6031007--650879--SRP_Mesh.PNG

6

The only way to reliably find out is to try on the target device :slight_smile:
Looking at the number of draw calls, I would first try reducing the number of meshes.