*
   * <p>This method has no effect (returns {@code this}) when called in GWT: it's unclear whether a
   * precomputed matcher is faster, but it certainly would consume more memory (which doesn't seem
   * like a worthwhile tradeoff in a browser).
   */
  public CharMatcher precomputed() {
    return Platform.precomputeCharMatcher(this);
  }

## Changelog since v1.4.0-alpha.1

### Action Required

* Federation API server kubeconfig secret consumed by federation-controller-manager has a new name. ([#28938](https://github.com/kubernetes/kubernetes/pull/28938), [@madhusudancs](https://github.com/madhusudancs))

 *
 * Instances of [HttpUrl] are well-formed and always have a scheme, host, and path. With
 * `java.net.URL` it's possible to create an awkward URL like `http:/` with scheme and path but no
 * hostname. Building APIs that consume such malformed values is difficult!
 *
 * This class has a modern API. It avoids punitive checked exceptions: [toHttpUrl] throws
 * [IllegalArgumentException] on invalid input or [toHttpUrlOrNull] returns null if the input is an

* Change ImageGCManage to consume ImageFS stats from StatsProvider ([#53094](https://github.com/kubernetes/kubernetes/pull/53094), [@yguo0905](https://github.com/yguo0905))

Defaulting will be available as alpha in Kubernetes 1.15 and requires structural schemas.

#### CustomResourceDefinition OpenAPI Publishing

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

- Remove insecure serving configuration from cloud-provider package, which is consumed by cloud-controller-managers. ([#108953](https://github.com/kubernetes/kubernetes/pull/108953), [@nckturner](https://github.com/nckturner))

*   You can now disable AppArmor by setting the AppArmor profile to unconfined. ([#52395](https://github.com/kubernetes/kubernetes/pull/52395),[ @dixudx](https://github.com/dixudx))
*   ImageGCManage now consumes ImageFS stats from StatsProvider rather than cadvisor. ([#53094](https://github.com/kubernetes/kubernetes/pull/53094),[ @yguo0905](https://github.com/yguo0905))

* Bump CNI consumers to v0.5.1 ([#43546](https://github.com/kubernetes/kubernetes/pull/43546), [@calebamiles](https://github.com/calebamiles))

### SIG Cloud Provider

- Fixes a flaw (CVE-2019-11253) in json/yaml decoding where large or malformed documents could consume excessive server resources. Request bodies for normal API requests (create/delete/update/patch operations of regular resources) are now limited to 3MB. ([#83261](https://github.com/kubernetes/kubernetes/pull/83261), [@liggitt](https://github.com/liggitt))...