How to Cache API Calls in Next.js

How to Cache API Calls in Next.js

In this tutorial, we will learn how to cache API calls in Nextjs. Redundant calls of the same API from the Next.js application cost money and affect app performance.

Redundant calls of the same API from the Next.js application are typical behavior. It could happen while updating the component or by traversing from one page to another. This repeat calling of the same API will cost us more money and affecting the app performance also. We could avoid this unnecessary API call by caching that API from the initial call itself.

By caching, we store that particular API call response in our local memory, and whenever the same call is triggered again, we send it from our local storage; thus, we could avoid the call to the server.

Caching flow

When we do an API call, we initially check in the cached memory whether the response for the corresponding API call is in the memory. If the response is present, we fetch the response from cached memory and then send it back to the client. If the response for a particular API call is not on the cached memory, we will directly call the server for the HTTP response. The HTTP response from the server first save on the cache memory, and then the response is sent back to the client.

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