Introduction
In the real world, users do not wait.
If a web application takes more than a few seconds to load, people leave. Performance is not a luxury — it is a business requirement.
In MERN applications, performance depends on:
- React rendering speed
- API response time
- Database queries
- Network efficiency
At CuriosityTech, performance optimization is taught as a professional engineering discipline, because fast applications are what companies pay for.
Day 20 is where MERN developers start thinking like system architects.
1. Why MERN Apps Become Slow
Performance issues come from:
- Too many API calls
- Unoptimized React components
- Large MongoDB queries
- Poor server configuration
Each of these must be controlled.
2. Optimization Layers
Every layer affects speed.
3. How Professionals Optimize
Developers:
- Cache data
- Reduce requests
- Optimize queries
- Compress responses
This is how large platforms serve millions of users.
Infographic Description
Title: MERN Performance Layers
Conclusion
Fast MERN apps win users, clients, and revenue.
By mastering performance optimization, developers gain a competitive edge that makes them valuable in the job market — exactly the goal of CuriosityTech’s advanced training.
