How to reproduce:
1. Open the “ECSTest“ project
2. Open the “Manual ECS Scene“
3. Comment the lines from 15 to 191 in the “ManualSpawnerDemo.cs“
4. Un-comment the lines from 195 to 357 in the “ManualSpawnerDemo.cs“
5. Build and Run
6. Connect the Profiler to the Player, run it for a bit, and save the data
7. Un-comment the lines from 15 to 191 in the “ManualSpawnerDemo.cs“
8. Comment the lines from 195 to 357 in the “ManualSpawnerDemo.cs“
9. Build and Run
10. Connect the Profiler to the Player, run it for a bit, and save the data
11. Compare the gathered data

Expected result: Single RenderMeshArray performs better than the multiple RenderMeshArrays
Actual result: Multiple RenderMeshArrays perform better than a single RenderMeshArray

Reproducible with: 1.2.3 (2022.3.45f1), 1.2.4, 1.3.0-exp.1, 1.3.0-pre.4 (2022.3.45f1, 6000.0.18f1)
Could not test with: 2021.3.43f1 (Entities Graphics not supported in the stream)

Reproducible on: Windows 10 Pro (22H2)
Not reproducible on: macOS 14.6.1 (Intel)

Notes:
- More information in the comments
- Reproduces in the editor, but memory consumption doesn’t differ that much between comparison objects