Performance concern of gossipsub metrics

[twoeths]

is there a cheaper way to get the information we're looking for? Imo the primary piece of information / questions we're answering are:

• how many subnets have 0 mesh peers?
• what is the distribution of mesh peers for the subnets?

I don't think we really need to know that eg subnet 13 has 3 mesh peers. Its not actionable.

Originally posted by @wemeetagain in #8442 (comment)

[Sandijigs]

Hi @philknows , I will love to work on this issue