How do I implement in-memory caching in Express.js?

How do I implement in-memory caching in Express.js?

To implement in-memory caching in Express.js, you can use a package like node-cache. Would you like a code example?

Yes, please provide a code example.

Sure! First, install node-cache using npm:

npm install node-cache

Then, you can set up caching like this:

const express = require('express');
const NodeCache = require('node-cache');

const app = express();
const cache = new NodeCache();

app.get('/data', (req, res) => {
    const cachedData = cache.get('myData');
    if (cachedData) {
        return res.json(cachedData);
    }
    // Simulate fetching data
    const data = { message: 'Hello, world!' };
    cache.set('myData', data, 100); // Cache for 100 seconds
    res.json(data);
});

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

This code caches the response for 100 seconds.

What are the benefits of using in-memory caching?

In-memory caching improves performance by reducing database load, speeding up response times, and enhancing user experience.