Practical Guide to Caching and Performance Optimization

Caching Documentation Introduction Caching is a technique used to store the result of expensive operations so that future requests can be served faster. It is commonly used in web applications to reduce latency, minimize server load, and improve overall performance. What is use cache The use cache directive allows developers to cache the return value of asynchronous functions and components. When applied, the function or component does not re-execute if the same inputs are provided. Instead, the cached result is returned. Usage 1. Data-Level Caching Data-level caching is used for functions that fetch or compute data. async function getProducts () { " use cache " ; // fetch products } async function getUser ( id ) { " use cache " ; // fetch user data } This approach is useful when the same data is requested multiple times , as it avoids repeated API or database calls . 2 . UI - Level Caching UI - level caching is applied to entire components or pages . export default async function Blog