Massively speed up light building and shader compiling! adjust UE4 affinity to LOW

To set the shader compiler priority to a default value for each compiler instance, we can access the BaseEngine.ini file located in Engine\Config directory. Open the file and search (ctrl + F) for “workerprocesspriority” and set the corresponding priority value to whatever suits your needs: -2 = Low, -1 = Below Normal, 0 = Normal, 1 = Above Normal, 2 = High.

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This sounds useful, but that line is not in BaseEngine.ini on UES 4.25 (UE-Source).

wow, thank you, it helped me a lot. But, a question, will this reduce the performance of the unreal?