Tvheadend

Even tho I don't even have transcoding enabled, I'm getting some high CPU usage for each stream.
I'm running TvHeadend from a docker in my old computer, which has an Intel 7700k with 16gb of RAM, and each stream is using around 4 to 6% of CPU.

When doing a htop this is what I see
https://imgur.com/a/Ra2Y1VE

Is this normal behaviour? If it is, I do have another CPU which I'll consider to replace my current one.
Would a AMD 7700x be better to handle multiple streams?

Thank you