field declaration. An empty tag string is equivalent to an absent tag.
The tags are made visible through a <a href="/pkg/reflect/#StructTag">reflection interface</a>
and take part in <a href="#Type_identity">type identity</a> for structs
but are otherwise ignored.
</p>

<pre>
struct {
	x, y float64 ""  // an empty tag string is like an absent tag
	name string  "any string is permitted as a tag"

- Improved scheduling performance when many nodes, and prefilter returned 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status. ([#125197](https://github.com/kubernetes/kubernetes/pull/125197), [@gabesaba](https://github.com/gabesaba))

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status ([#125307](https://github.com/kubernetes/kubernetes/pull/125307), [@gabesaba](https://github.com/gabesaba)) [SIG Scheduling]

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status ([#125309](https://github.com/kubernetes/kubernetes/pull/125309), [@gabesaba](https://github.com/gabesaba)) [SIG Scheduling]

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status ([#125306](https://github.com/kubernetes/kubernetes/pull/125306), [@gabesaba](https://github.com/gabesaba)) [SIG Scheduling]

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status ([#125308](https://github.com/kubernetes/kubernetes/pull/125308), [@gabesaba](https://github.com/gabesaba)) [SIG Scheduling]

  - When registering with a 1.17+ API server, a CustomResourceDefinition conversion webhook can now request that only `v1` ConversionReview requests be sent to them. Previously, conversion webhooks were required to support receiving `v1beta1` ConversionReview...

  // the client source IP. (Traffic mistakenly sent to a node with no endpoints will
  // be dropped.) The default value, "Cluster", uses the standard behavior of
  // routing to all endpoints evenly (possibly modified by topology and other
  // features). Note that traffic sent to an External IP or LoadBalancer IP from

- The `AdmissionReview` API sent to and received from admission webhooks has been promoted to `admission.k8s.io/v1`. Webhooks can specify a preference for receiving `v1` AdmissionReview objects with `admissionReviewVersions: ["v1","v1beta1"]`, and must respond with an API object in the same `apiVersion` they are sent. When webhooks use `admission.k8s.io/v1`, the following additional validation is performed on their responses:...

### Extensibility around core Kubernetes APIs

#### CustomResourceDefinitions Pruning