- Improved HPA performance when using container-specific resource metrics by optimizing container lookup logic to exit early once the target container is found, reducing unnecessary iterations through all containers in a pod. ([#133415](https://github.com/kubernetes/kubernetes/pull/133415), [@AadiDev005](https://github.com/AadiDev005)) [SIG Apps and Autoscaling]

- Fix kube-apiserver not to create default/kubernetes service endpoints before it reports readiness via the /healthz and therefore is ready to serve requests. Also early during startup old endpoints are remove which might be left over from a previously crashed kube-apiserver. ([#74668](https://github.com/kubernetes/kubernetes/pull/74668), [@sttts](https://github.com/sttts))

		d.CreateDate = now
	}
	d.Policy = p
}

// parseJSON parses both the old and the new format for storing policy
// definitions.
//
// The on-disk format of policy definitions has changed (around early 12/2021)
// from policy.Policy to PolicyDoc. To avoid a migration, loading supports
// both the old and the new formats.
func (d *PolicyDoc) parseJSON(data []byte) error {
	json := jsoniter.ConfigCompatibleWithStandardLibrary

  // Update name_map with newly-created ops.
  // TODO(skyewm): right now BuildWhileLoop() may alter the graph if it returns
  // a bad status. Once we fix this, we may want to return early instead of
  // executing the following code.
  for (int i = first_new_node_id; i < parent->graph.num_node_ids(); ++i) {
    Node* new_node = parent->graph.FindNodeId(i);
    if (new_node == nullptr) continue;

X,EAAAA,QAAE8W,IAA+B5T,QACjCxB,KAAKiW,oBACLjW,KAAKwW,QAIP,IAAMC,EAAgBb,GAAYc,QAAO,SAAAjK,GAAI,OAAKA,EAAKkK,KAAMJ,cAAcK,SAASP,MAC9EQ,EAAavY,EAAAA,QAAEmY,EAAcK,MAAM,EAAG9W,KAAK8J,QAAQyL,aACzDjX,EAAAA,QAAE8W,IAA+B5T,QAEP,IAAtBqV,EAAW1N,OACbnJ,KAAKiW,eAELY,EAAWtU,MAAK,SAAC4O,EAAG4F,GAClBzY,EAAAA,QAAE8W,IAA+B3T,OAAOI,EAAKmV,YAAY5I,OAAO2I,EAAOJ,MAAOM,UAAUF,EAAOpJ,MAAOoJ,EAAOG,UAIjHlX,KAAKmX,UAGPA,KAAA,WACE7Y,EAAAA,QAAEgM,IAAsBZ,SAAS9F,SAASiQ,IAC1CvV,EAAAA,QAAE4W,IAAsBlR,YAAY4Q,IAAwBhR,SAASiR,OAGvE2B,M...

We expect this implementation to progress from alpha to beta and GA in coming releases, so we’re eager to have you comment about your dual-stack experiences in [#k8s-dual-stack](https://kubernetes.slack.com/messages/k8s-dual-stack) or in [enhancements #563](https://features.k8s.io/563). 

### go1.15.5

    * New docs: [Dependencies with `yield` - Early exit and `scope`](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-with-yield/#early-exit-and-scope).

### Internal

- `ValidatingAdmissionPolicy` now preserves types of composition variables, and raises type-related errors early. ([#121001](https://github.com/kubernetes/kubernetes/pull/121001), [@jiahuif](https://github.com/jiahuif))

- DRA: When the prioritized list feature was used in a request and the resulting number of allocated devices exceeded the number of allowed devices per claim, the scheduler aborted the attempt to allocate devices early. Previously, it tried to many different combinations, which could take a long time. ([#130593](https://github.com/kubernetes/kubernetes/pull/130593), [@mortent](https://github.com/mortent)) [SIG Apps, Node, Scheduling and Testing]

- Added the feature gates `StrictCostEnforcementForVAP` and `StrictCostEnforcementForWebhooks` to enforce the strict cost calculation for CEL extended libraries. It is strongly recommended to turn on the feature gates as early as possible. ([#124675](https://github.com/kubernetes/kubernetes/pull/124675), [@cici37](https://github.com/cici37)) [SIG API Machinery, Auth, Node and Testing]