- [`KT-52367`](https://youtrack.jetbrains.com/issue/KT-52367) Devirtualization algorithm improvement
- [`KT-58652`](https://youtrack.jetbrains.com/issue/KT-58652) Native: Implement frontend checkers for HiddenFromObjC on classes

#### Performance Improvements

- [`KT-59600`](https://youtrack.jetbrains.com/issue/KT-59600) K2: CFG: do not add edges to nested classes and functions

### Migration

For the 1.8 release, SIG Node continued to focus
on a broad set of workload types, including hardware and performance
sensitive workloads such as data analytics and deep learning. The SIG also
delivered incremental improvements to node reliability.

[SIG Node]: https://github.com/kubernetes/community/tree/master/sig-node

### SIG Network

[SIG Network][] is responsible for networking components, APIs, and plugins in Kubernetes.

    - [Cluster-wide seccomp defaults](#cluster-wide-seccomp-defaults)
    - [Quality of Service for memory resources](#quality-of-service-for-memory-resources)
    - [API changes and improvements for ephemeral containers](#api-changes-and-improvements-for-ephemeral-containers)
  - [Known Issues](#known-issues)

- Performance improvements in `klog` ([#115277](https://github.com/kubernetes/kubernetes/pull/115277), [@pohly](https://github.com/pohly))

It has been more than two years since the Linux kernel cgroups v2 API was declared stable. With some distributions now defaulting to this API, Kubernetes must support it to continue operating on those distributions. cgroups v2 offers several improvements over cgroups v1, for more information see the [cgroups v2](https://kubernetes.io/docs/concepts/architecture/cgroups/) documentation. While cgroups v1 will continue to be supported, this enhancement puts Kubernetes to be ready for eventual deprecation...