Your RHIT climbed from 5ms to 25ms. I encountered the same issue with UE 5.4.4.
For some reason the RHIT is no longer parallel to the CPU and GPU workload, but only picks up work once CPU and GPU are done. No idea what’s going on, but it cut my performance in half.
I’ve posted my UE Insight profile here:
I’ve older UE profiles from previous UE versions (i.e. pre 5.4.4) where this problem did not occur. The RHIT was parallel to GPU and CPU. Definitely a massive engine issue.
Funny enough, renderer parallelization was announced a big thing for 5.4. That’s when it started to become a problem on my PC.