I did not know about this software. Apparently, it does, but I personally would feel more comfortable with an OS implementation than a third-party's.
To be honest, I am not sure if any of this is really necessary. Both Microsoft and Bitsum mention the term micro-latencies, which to the best of knowledge, refers to the time it takes to unpark CPU cores and increase clock frequencies to their maximum. But is this a problem in need of a solution, or are Ultimate Performance mode, and Bitsum's equivalent, solutions looking for a problem to justify their existence?