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Tech Note: Regression in editor performance in D3D11

Mar 10, 2021.Knowledge

Description
In D3D11Commands.cpp, we are resolving the debug uniform buffer layout name to an FName instance, which is very expensive. This gets compiled out in test builds, however.

Potential Impact
Moderate: Impacts performance numbers in DX11 development builds.

Solution:
The fix is in CL 15587568, and will be released with Unreal 4.26.2

UE VERSION

4.25, 4.24, 4.23, 4.26