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Fixed in 2020.2

Fixed in 2020.1

Votes

0

Found in

2018.1.0b12

Issue ID

1025172

Regression

No

Compute shader is significantly slower in DX12 compared to DX11

Graphics - General

-

How to reproduce:
1. Open user-submitted project (ResourceBarrierHandicap.zip)
2. Open "SampleScene.unity" scene
3. Set DirectX11 as the main Unity Editor Graphics API
4. Play scene
5. Observe runtime statistics
6. Set DirectX12 as the main Unity Editor Graphics API
7. Play scene
8. Observe runtime statistics

Expected result: DirectX11 and DirectX12 runtime statistics don't differ a lot
Actual result: DirectX12 runs at the quarter of the DirectX11 speed

Reproducible with: 2017.4.7f1, 2018.1.9f1, 2018.2.0f2, 2018.3.0a5
Could not test with: 2017.1.4p2, 2017.2.3p2(DirectX 12 Unity Editor was not introduced yet)

  1. Response avatar

    Resolution Note (fix version 2020.2):

    Compute shader DX12 performance has been improved significantly in 2020.2. The overall performance is still slower compared to Dx11 but the cause is different and will be fixed separately.

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