# requestIsCacheEquivalent(_:to:) A Boolean value indicating whether two requests are equivalent for cache purposes. ``` class func requestIsCacheEquivalent(_ a: URLRequest, to b: URLRequest) -> Bool ``` ## Parameters `a` The request to compare with `bRequest`. `b` The request to compare with `aRequest`. ## Return Value if `aRequest` and `bRequest` are equivalent for cache purposes, otherwise. ## Discussion Requests are considered equivalent for cache purposes if and only if they would be handled by the same protocol and that protocol declares them equivalent after performing implementation-specific checks. The [`URLProtocol`](/documentation/Foundation/URLProtocol) implementation of this method compares the URLs of the requests to determine if the requests should be considered equivalent. Subclasses can override this method to provide protocol-specific comparisons. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)