## Changelog since v1.23.15

## Changes by Kind

### API Change

- Kubernetes 1.23 is now built with go1.19.4. To match behavior of previous Kubernetes 1.23 patch releases:
  - `kube-apiserver` defaults the GOGC setting to 63, to approximate go1.17 garbage collection memory performance in heavily loaded API servers

    - [Server Binaries](#server-binaries-6)
    - [Node Binaries](#node-binaries-6)
  - [Changelog since v1.12.3](#changelog-since-v1123)
    - [Action Required](#action-required)
    - [Other notable changes](#other-notable-changes-6)
- [v1.12.3](#v1123)
  - [Downloads for v1.12.3](#downloads-for-v1123)
    - [Client Binaries](#client-binaries-7)
    - [Server Binaries](#server-binaries-7)

</p>

<p>
For example, <code>new(int)</code> and <code>new(123)</code> each
return a pointer to a new variable of type <code>int</code>.
The value of the first variable is <code>0</code>, and the value
of the second is <code>123</code>. Similarly
</p>

<pre>
type S struct { a int; b float64 }
new(S)
</pre>

<p>

- Fixed a regression in 1.23 that incorrectly pruned data from array items of a custom resource that set `x-kubernetes-preserve-unknown-fields: true`. ([#107688](https://github.com/kubernetes/kubernetes/pull/107688), [@liggitt](https://github.com/liggitt))

- github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding: [v1.11.3 → v1.12.3](https://github.com/aws/aws-sdk-go-v2/compare/service/internal/accept-encoding/v1.11.3...service/internal/accept-encoding/v1.12.3)

- Allowed setting the `hostnameOverride` field in `PodSpec` to specify any RFC 1123 DNS subdomain as the pod's hostname. The `HostnameOverride` feature gate was introduced to control enablement of this functionality. ([#132558](https://github.com/kubernetes/kubernetes/pull/132558), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG...

pkg syscall (netbsd-arm64-cgo), const DLT_SLIP_BSDOS = 13
pkg syscall (netbsd-arm64-cgo), const DLT_SLIP_BSDOS ideal-int
pkg syscall (netbsd-arm64-cgo), const DLT_SLIP ideal-int
pkg syscall (netbsd-arm64-cgo), const DLT_SUNATM = 123
pkg syscall (netbsd-arm64-cgo), const DLT_SUNATM ideal-int
pkg syscall (netbsd-arm64-cgo), const DLT_SYMANTEC_FIREWALL = 99
pkg syscall (netbsd-arm64-cgo), const DLT_SYMANTEC_FIREWALL ideal-int

- github.com/google/cadvisor: [v0.44.1 → v0.45.0](https://github.com/google/cadvisor/compare/v0.44.1...v0.45.0)
- github.com/google/cel-go: [v0.12.3 → v0.12.4](https://github.com/google/cel-go/compare/v0.12.3...v0.12.4)
- github.com/imdario/mergo: [v0.3.5 → v0.3.6](https://github.com/imdario/mergo/compare/v0.3.5...v0.3.6)

- Modify DNS-1123 error messages to indicate that RFC 1123 is not followed exactly ([#94182](https://github.com/kubernetes/kubernetes/pull/94182), [@mattfenwick](https://github.com/mattfenwick)) [SIG API Machinery, Apps, Auth, Network and Node]

- Scheduler's assumed...