wtf is flask-caching?

Flask-Caching is a Python extension that makes it easy to add caching to Flask web applications. Caching stores the results of expensive operations so that the next time someone requests the same information, your app can return it instantly from memory instead of doing all the work again. This makes web pages load faster and reduces the load on your servers. The extension works by letting you mark specific functions or responses as "cacheable" with a simple decorator or configuration. When someone visits a page or calls a function for the first time, the result gets stored. The next request for the same thing returns the cached version until the cache expires or gets cleared. You can configure how long things stay cached, where the cache is stored (in memory, on disk, in Redis, etc.), and which parts of your app should use caching. Setting it up is straightforward. You initialize the cache extension when you create your Flask app, tell it what type of storage you want to use, and then decorate the functions or routes you want to cache. The README shows two setup patterns: one where you initialize everything at once, and another where you set up the cache separately and attach it to your app later, useful if you're building apps following certain architectural patterns. This project is actively maintained as a continuation of an older Flask caching library that stopped being updated. It's compatible with the original version, which means if you have an old Flask application using that library, switching to this one is usually as simple as changing your import statement. If you're building a Flask web app, whether it's a simple website, an API, or a dashboard, and you want to speed up performance by avoiding repeated calculations or database queries, this extension handles that for you.