A developer wants to improve runtime performance of Apex calls by caching result on the client. What is the most efficient way to implement this and follow best practices?

The `total-true` attribute for `@AuraEnabled` is not a valid or recognized parameter for enabling client-side caching in Apex methods; the correct parameter is `cacheable=true`.

While `setStorable()` was used in Aura Components to mark actions as cacheable, for Lightning Web Components, the `(cacheable=true)` annotation on the Apex method is the declarative and preferred approach to enable client-side caching.

Decorating an `@AuraEnabled` server-side Apex method with `(cacheable=true)` enables the Lightning Component framework to cache the method's results on the client-side. This significantly improves performance for read-only data by avoiding unnecessary server round trips, adhering to best practices for data retrieval in Lightning Web Components.

Setting a cookie in the browser to cache data is a manual, less secure, and less performant approach compared to the built-in Lightning framework caching mechanisms, and does not integrate with Lightning Data Service or security features.