- Improved scheduler performance when no scoring plugins were defined.
   ([#122058](https://github.com/kubernetes/kubernetes/pull/122058), [@aleksandra-malinowska](https://github.com/aleksandra-malinowska))
- Improved scheduler performance when no scoring plugins were defined.

* Protobuf serialization does not distinguish between `[]` and `null`.
API fields previously capable of storing and returning either `[]` and `null` via JSON API requests (for example, the Endpoints `subsets` field)

- The `WatchFromStorageWithoutResourceVersion`...

- Fix an error when using external etcd but storing etcd certificates in the same folder with the same name used by kubeadm for local etcd certificates; for an older version of kubeadm, the workaround is to avoid file name used by kubeadm for local etcd. ([#80867](https://github.com/kubernetes/kub...

- Empty values are no longer assigned to undefined resources (CPU or memory) when storing the resources allocated to the pod in checkpoint. ([#117615](https://github.com/kubernetes/kubernetes/pull/117615), [@aheng-ch](https://github.com/aheng-ch))

  - `setcap` to v2.0.3 ([#103235](https://github.com/kubernetes/kubernetes/pull/103235), [@thejoycekung](https://github.com/thejoycekung)) [SIG API Machinery, Release and Testing]

### Bug or Regression

- Scheduler: Add DefaultBinder plugin ([#87430](https://github.com/kubernetes/kubernetes/pull/87430), [@alculquicondor](https://github.com/alculquicondor)) [SIG Scheduling and Testing]
- Skip default spreading scoring plugin for pods that define TopologySpreadConstraints ([#87566](https://github.com/kubernetes/kubernetes/pull/87566), [@skilxn-go](https://github.com/skilxn-go)) [SIG Scheduling]

  
  `NodeResourcesFit` plugin scoring didn't work for extended resources backed by DRA. ([#130653](https://github.com/kubernetes/kubernetes/pull/130653), [@yliaog](https://github.com/yliaog)) [SIG API Machinery, Apps, Auth, Node, Scheduling and Testing]

- The scheduler started considering the resource requests of existing sidecar containers during the scoring process. ([#127878](https://github.com/kubernetes/kubernetes/pull/127878), [@AxeZhan](https://github.com/AxeZhan)) [SIG Scheduling and Testing]

    * The `spec.AllowedUnsafeSysctls` and `spec.ForbiddenSysctls` fields are now dropped during creation of `PodSecurityPolicy` objects unless the `Sysctls` feature gate is enabled.
* kubeadm: fixed storing of front-proxy certificate in secrets required by kube-controller-manager selfhosting pivoting ([#72727](https://github.com/kubernetes/kubernetes/pull/72727), [@bart0sh](https://github.com/bart0sh))