Automatic merge from submit-queue (batch tested with PRs 44722, 44704, 44681, 44494, 39732)
Don't rebuild endpoints map in iptables kube-proxy all the time.
@thockin - i think that this PR should help with yours https://github.com/kubernetes/kubernetes/pull/41030 - it (besides performance improvements) clearly defines when update because of endpoints is needed. If we do the same for services (I'm happy to help with it), i think it should be much simpler.
But please take a look if it makes sense from your perspective too.