The maximum number of server at backend

I see many benchmark articles about how much concurrent connections the HAProxy can handle

But I don’t see any articles about how much servers at backend, the HAProxy can handle.

Is there can be a limitation of the number of server at backend?

I saw the limitation is 4095 when round robin is used, at the document HAProxy version 2.6-dev0 - Configuration Manual

When I search “max server” at this community page, I saw some articles that said above 100 servers can make problems such as memory usage, or DNS auto-resolve and so on.

I wonder how the HAProxy performance(Memory usage, CPU usage and so on) can be degraded according to the number of backend server.

Could you give me some help?

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