Reducing RTPSO build times

My packaged project loads for about 20 seconds. I am using level streaming. I have added a splash screen with simple video to make waiting less tedious. However everytime the video freezes until the main level is loaded. I also added basic throbber but it freezes too. The log file indicates that the problem is extended RTPSO loading time.

I don’t have coding skills. I wonder if there is a simple way to reduce Ray Tracing PSO (RTPSO) build times?