CasparCG very low performance / high CPU usage compare to other tool?

hey , I am not here for some argue, no offence
I am not a C++ programmer, actually I am not a programmer, that’s why I have to use C# which is easier for self learning and coding. and I did check source code and fixed it to get rtsp stream working (FFMpeg producer parameters support?), but that’s really my best effort. just not able to improve the performance

and I am here looking for help, CasparCG is wonderful tool for all my need, I do appreciates alot for saving me time.

this usage situation matters for some ppl I believe, if 4x1080p videos cost 50%, how about 9 or more videos, or 4x4K videos we are sure will be using in a few years

It’s just not a blame, because the huge difference indicates something wrong there, or maybe it is how I use CasparCG, maybe some configuration problem? maybe this only happens on my own PC? I don’t know, and at least I want to know if it is my own problem.