Significant memory usage

[OwN-3m-All]

No, I'm not asking you to prioritize anything.  I'm just saying that
previously valid and memory performant setups are not performing well on
the newest versions of bind (using too much memory).

I created this setup based on guides I found online.  So, if this is not
the proper way to do it, what is the proper way?

I don't know much about RPZ.

Is it as simple as creating a billion CNAME records as suggested by Carlos
in one zone file?

And, why is that more performant as opposed to creating thousands of zones?

They're doing the same thing?
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