Only load resources of a filter once for all subsequent filters

[M-Dominguez]

Hey, Kurento Community, I have an idea but not sure how I could implement it. I would like to through some ideas around.

I have created a custom face detection filter and I want to make sure it only loads the model once, even if I call create.facefilter. It originally used the haar cascade, now i am upgrading it to yolov8. There is a big performance difference and I believe its from having to load the model. What are some ways to only load the model once?

Here are some of my ideas:

1. I was thinking i could pass the loaded model to the filter. not sure how this would work since I am using JS to interface to the KMS.
2. I could have a shared state in the filter that finds a global variable and loads it only on the first time i call create.facefilter and every subsequent call will use the global variable. I think this one is promising but not sure where to put this variable in the kurento filter code.

Or maybe I'm thinking about this wrong. I dont know let me know what you think. for now I'm going to see if I can do the second option.