Automatic merge from submit-queue (batch tested with PRs 66577, 67948, 68001, 67982). If you want to cherry-pick this change to another branch, please follow the instructions here: https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md.

Reduce amount of allocations in kube-proxy

Follow up from https://github.com/kubernetes/kubernetes/pull/65902