Unity Issue Tracker - Garbage is allocated when GraphicsBuffers constructor and other APIs that returns GraphicsBuffers are called

Fixed in 2022.2.X

Duplicate in 2020.3.X, 2021.3.X

Votes

0

Found in

2021.2.0a18

2021.3

2022.1

2022.2

Issue ID

1418412

Regression

Yes

Garbage is allocated when GraphicsBuffers constructor and other APIs that returns GraphicsBuffers are called

Graphics Device Features

Apr 08, 2022

Reproduction:
1. Open the attached project "MinimalRepro-1418412.zip"
2. Open Assets/Scenes/TestMeshGetVertexBufferDoesNotAllocateMemory.unity
3. Open Window > Analysis > Profiler
4. In the Profiler window ensure that the "record" icon is red and the mode dropdown shows "Play Mode"
5. Enter Play Mode
6. Go to the Profiler window and click the CPU Usage graph
7. In the detailed view navigate to PlayerLoop > Update.ScriptRunBehaviorUpdate > BehaviorUpdate > ProfilerMarkersForCreatingGraphicsBuffer.Update() [Invoke] > Repro > Allocation
8. Observe the GC.Alloc

Expected result: < 50 B of garbage is allocated
Actual result: > 330 B of garbage is allocated

Reproducible with: 2021.2.0a18, 2021.3.4f1, 2022.1.6f1, 2022.2.0a16
Not reproducible with: 2020.3.36f1, 2021.2.0a17
Couldn't test with: 2019.4.39f1 (Couldn't resolve console errors)

Reproducible on: Windows 10

Resolution Note (fix version 2022.2):

Fixed in: 2022.2.0a17

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