The script works well.
I got 7.05FPS with MT OFF and 11.9FPS with MT ON using HuffYUV.
About a 69% increase.
Also,
I hope Shodan eventually puts your code into the upcoming version of AVS 2.6.
He told you "I'll do it ASAP" in
this thread, but didn't give a clear response confirming whether he did or not.
You might want to try reminding him again.