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There may be some useful enhancements in https://github.com/cel-expr/cel-go/releases/tag/v0.28.0 and https://github.com/cel-expr/cel-go/releases/tag/v0.29.0, but primarily the goal is to get https://github.com/cel-expr/cel-go/pull/1357 (included in v0.29.0) because that is a relevant performance improvement for how DRA uses CEL. Updating to >= v0.28.1 is safe, in contrast to v0.28.0, because v0.28.1 includes https://github.com/cel-expr/cel-go/pull/1303 and therefore doesn't trigger https://github.com/kubernetes/kubernetes/issues/138334. As explained by Tristan Swadell (https://github.com/kubernetes/kubernetes/pull/140205#issuecomment-4877100299), startsWith now scales to the size of the substring rather than the target string, which changes some of the cost estimates. In another case, the substring has to be made larger to trip an expected cost budget error.