How can I implement caching in my Express.js application?

How can I implement caching in my Express.js application?

You can use middleware like apicache or node-cache to implement caching in your Express.js app.

Can you show me a basic example using apicache?

Sure! First, install apicache using npm. Then, you can set it up like this:

const express = require('express');
const apicache = require('apicache');

const app = express();
const cache = apicache.middleware;

app.get('/data', cache('5 minutes'), (req, res) => {
    // Simulate a slow database call
    setTimeout(() => {
        res.json({ message: 'This is cached data!' });
    }, 2000);
});

app.listen(3000, () => {
    console.log('Server running on port 3000');
});

What are the benefits of using caching?

Caching can significantly improve your application's performance by reducing response times and decreasing the load on your server.

Are there any downsides to caching?

Yes, caching can lead to stale data if not managed properly, and it may increase complexity in your application.