UE5.1 PostProcess Custom Shader 100x slowdown (Kuwahara Filter)

Hi, thanks for your reply. Yes, I confirmed the behavior in SM6 and in Vulkan, so it seems that just the switch to SM6 would not explain it. I did go through the changelog but it was not granular enough to show me actual API differences in the RHI, so now I’m looking through Github and taking a look at differences in frames between 5.0.3 and 5.1 in RenderDoc.

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