When you use **FastAPI**, there's a lot more going on, processing the request and response, handling dependencies, executing **your own code**, and particularly, **waiting for the network**. But you will probably still get some nice performance improvements just from the upgrade.

    - [(No, really, you MUST do this before you upgrade)](#no-really-you-must-do-this-before-you-upgrade)
  - [Known Issues](#known-issues)
  - [Deprecations](#deprecations)
  - [Major Themes](#major-themes)
    - [SIG API Machinery](#sig-api-machinery)
    - [SIG Auth](#sig-auth)
    - [SIG AWS](#sig-aws)
    - [SIG Azure](#sig-azure)
    - [SIG Big Data](#sig-big-data)
    - [SIG CLI](#sig-cli)

where <code>T</code> is not a pointer or interface type,
<code>x.f</code> denotes the field or method at the shallowest depth
in <code>T</code> where there is such an <code>f</code>.
If there is not exactly <a href="#Uniqueness_of_identifiers">one <code>f</code></a>
with shallowest depth, the selector expression is illegal.
</li>

<li>

pod priority and pod preemption. These features allow mixing various types of workloads in a single cluster, and help reach
higher levels of resource utilization and availability.
These features are in alpha. SIG Scheduling also improved the internal APIs for scheduling and made them easier for other components and external schedulers to use.

## Major themes

Kubernetes is developed by community members whose work is organized into
[Special Interest Groups](https://github.com/kubernetes/community/blob/master/sig-list.md), which provide the themes that guide their work. For the 1.9 release, these themes included:

### API Machinery

  // either order).  These families must correspond to the values of the
  // clusterIPs field, if specified. Both clusterIPs and ipFamilies are
  // governed by the ipFamilyPolicy field.
  // +listType=atomic
  // +optional
  repeated string ipFamilies = 19;

  // IPFamilyPolicy represents the dual-stack-ness requested or required by
  // this Service. If there is no value provided, then this field will be set

    - [Client Binaries](#client-binaries-17)
    - [Server Binaries](#server-binaries-17)
    - [Node Binaries](#node-binaries-17)
  - [Changelog since v1.21.0](#changelog-since-v1210)
  - [What's New (Major Themes)](#whats-new-major-themes)
    - [Removal of several beta Kubernetes APIs](#removal-of-several-beta-kubernetes-apis)
    - [Kubernetes release cadence change](#kubernetes-release-cadence-change)

* kubeadm now attempts to detect an installed CRI by its usual domain socket, so that --cri-socket can be omitted from the command line if Docker is not used and there is a single CRI installed. ([#69366](https://github.com/kubernetes/kubernetes/pull/69366),...

    - [Client Binaries](#client-binaries-10)
    - [Server Binaries](#server-binaries-10)
    - [Node Binaries](#node-binaries-10)
  - [Known Issues](#known-issues)
  - [Major Themes](#major-themes)
    - [SIG API Machinery](#sig-api-machinery)
    - [SIG-autoscaling](#sig-autoscaling)
    - [SIG-Azure](#sig-azure)
    - [SIG-cli](#sig-cli)
    - [SIG-cloud-provider](#sig-cloud-provider)

    - [Client Binaries](#client-binaries-15)
    - [Server Binaries](#server-binaries-15)
    - [Node Binaries](#node-binaries-15)
  - [Changelog since v1.19.0](#changelog-since-v1190)
  - [What's New (Major Themes)](#whats-new-major-themes)
    - [Dockershim deprecation](#dockershim-deprecation)
    - [External credential provider for client-go](#external-credential-provider-for-client-go)