How much CPU and memory does a CNI actually use?
A CNI is picked once and rarely revisited, and there is no organized data on what it consumes day to day. Measuring 5 CNIs in 14 configurations under identical conditions showed an 8x memory spread, an eBPF map share that kubectl top never sees, and a 70% kube-proxy memory saving from the nftables mode that had not been published as a number.