- StatefulSet controllers no longer force a resync every 30 seconds when nothing has changed. ([#75622](https://github.com/kubernetes/kubernetes/pull/75622), [@jonsabo](https://github.com/jonsabo))

  a bug in the transforming informer during the Resync operation, 
  by making the transforming function idempotent. ([#124352](https://github.com/kubernetes/kubernetes/pull/124352), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery and Scheduling]

* Fix resync goroutine leak in ListAndWatch ([#35672](https://github.com/kubernetes/kubernetes/pull/35672), [@tatsuhiro-t](https://github.com/tatsuhiro-t))

#### client-go

    media_type = "application/x-level-5"


async def dep0(response: Response):
    response.headers["x-level0"] = "True"


async def dep1(response: Response):
    response.headers["x-level1"] = "True"


async def dep2(response: Response):
    response.headers["x-level2"] = "True"


async def dep3(response: Response):
    response.headers["x-level3"] = "True"


async def dep4(response: Response):

- Reduced event spam during volume operation errors in the Portworx in-tree driver. ([#135081](https://github.com/kubernetes/kubernetes/pull/135081), [@gohilankit](https://github.com/gohilankit))
- Removed `rsync` as a dependency to build Kubernetes. ([#134656](https://github.com/kubernetes/kubernetes/pull/134656), [@BenTheElder](https://github.com/BenTheElder)) [SIG Release and Testing]

- In "large" clusters, kube-proxy in iptables mode will now sometimes
  leave unused rules in iptables for a while (up to `--iptables-sync-period`)
  before deleting them. This improves performance by not requiring it to
  check for stale rules on every sync. (In smaller clusters, it will still
  remove unused rules immediately once they are no longer used.)

- Fixed bug in CPUManager with race on container map access ([#97427](https://github.com/kubernetes/kubernetes/pull/97427), [@klueska](https://github.com/klueska)) [SIG Node]

### Feature

- Added 3 new metrics for monitoring async API calls in the scheduler when the `SchedulerAsyncAPICalls` feature gate was enabled:
    - `scheduler_async_api_call_execution_total`: tracks executed API calls by call type and result (success/error)

pkg os (netbsd-arm64-cgo), const DevNull = "/dev/null"
pkg os (netbsd-arm64-cgo), const O_APPEND = 8
pkg os (netbsd-arm64-cgo), const O_CREATE = 512
pkg os (netbsd-arm64-cgo), const O_EXCL = 2048
pkg os (netbsd-arm64-cgo), const O_SYNC = 128
pkg os (netbsd-arm64-cgo), const O_TRUNC = 1024
pkg os (netbsd-arm64-cgo), const PathListSeparator = 58
pkg os (netbsd-arm64-cgo), const PathSeparator = 47
pkg os (netbsd-arm64), const DevNull = "/dev/null"

### SIG Windows

- Kubelet no longer attempts to sync iptables on non-Linux systems.. ([#67690](https://github.com/kubernetes/kubernetes/pull/67690), [@feiskyer](https://github.com/feiskyer))