- Added CEL runtime cost calculation into CustomerResource validation. CustomerResource validation will fail if runtime cost exceeds the budget. ([#108482](https://github.com/kubernetes/kubernetes/pull/108482), [@cici37](https://github.com/cici37))

## Changelog since v1.26.8

## Changes by Kind

### API Change

- Fixed a bug where CEL expressions in CRD validation rules would incorrectly compute a high estimated cost for functions that return strings, lists or maps.

- DRA: CEL expressions using attribute strings exceeded the cost limit because their cost estimation was incomplete. ([#129661](https://github.com/kubernetes/kubernetes/pull/129661), [@pohly](https://github.com/pohly)) [SIG Node]

- Added `SizeBasedListCostEstimate` feature gate that allowed apiserver to estimate sizes of objects to calculate cost of LIST requests. ([#132355](https://github.com/kubernetes/kubernetes/pull/132355), [@serathius](https://github.com/serathius)) [SIG API Machinery and Etcd]

github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
github.com/antithesishq/antithesis-sdk-go v0.4.3-default-no-op h1:+OSa/t11TFhqfrX0EOSqQBDJ0YlpmK0rDSiB19dg9M0=
github.com/antithesishq/antithesis-sdk-go v0.4.3-default-no-op/go.mod h1:IUpT2DPAKh6i/YhSbt6Gl3v2yvUZjmKncl7U91fup7E=

- Made legacy watch calls (`ResourceVersion` = 0 or unset) that generate init-events weigh higher in `API Priority and Fairness (APF)` seat usage. Properly accounting for their cost protects the API server from CPU overload. Users might see increased throttling of such calls as a result. ([#134601](https://github.com/kubernetes/kubernetes/pull/134601), [@shyamjvs](https://github.com/shyamjvs))

        internally.

        The first time it is called it stores the result in the attribute
        `app.openapi_schema`, and next times it is called, it just returns that same
        result. To avoid the cost of generating the schema every time.

        If you need to modify the generated OpenAPI schema, you could modify it.

        Read more in the

cxe?mordorea?ni&gne?lria?zagam??rawtfos??gni&d&art?ilg!arap?gnah???l&dnahdnuorg?ledom??noollab?retac?sael?t&lusnoc?uhcarap??vidyks??hcraeser?ixat?l&anruoj?euf?icnuoc?ortnoc!-ciffart-ria???n&gised?oi&nu?t&a&cifitrec?ercer?gi&tsevni-tnedicca?van??i&cossa!-regnessap??valivic??redef??cudorp?neverp-tnedicca????ograc?p&ihsnoipmahc?uorg!gnikrow???r&e&dart?enigne?korb?niart?trahc??o&htua?tacude???s&citsigol?e&civres?r??krow?serp!xe??tnega??t&farcr&ia?otor??hgi&erf?l&f?orcim???liubemoh?n&atlusnoc?e&duts?...

   * are guarded by a lock and operations are applied in batches to avoid lock contention. The
   * penalty of applying the batches is spread across threads so that the amortized cost is slightly
   * higher than performing just the operation without enforcing the capacity constraint.
   *
   * This implementation uses a per-segment queue to record a memento of the additions, removals,

- Added the feature gates `StrictCostEnforcementForVAP` and `StrictCostEnforcementForWebhooks` to enforce the strict cost calculation for CEL extended libraries. It is strongly recommended to turn on the feature gates as early as possible. ([#124675](https://github.com/kubernetes/kubernetes/pull/124675), [@cici37](https://github.com/cici37)) [SIG API Machinery, Auth,...