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Have you ever opened a website that takes too long to load? Performance testing helps us find these problems before users face them. Load testing checks how well an application works when many users use it at the same time. testautomationu.applitools.com

What Is Performance Testing?

Performance testing checks how fast and responsive an application is.

For example, if a website takes 2 seconds to load normally, we can test how quickly it responds and where delays are happening.

What Is Load Testing?

Load testing checks how much traffic an application can handle.

For example, a shopping website may work perfectly with 100 users, but what happens when 10,000 users visit at the same time?

That’s what load testing helps us understand. testautomationu.applitools.com

Simple Real-Life Example

Imagine you have an online shopping website.

Normally:

100 users → Website works smoothly

During a sale:

10,000 users → Website becomes slow

A load test can help you find this problem before the sale starts.

Simple JMeter Example

JMeter is one of the tools commonly used for load testing. testautomationu.applitools.com

A simple JMeter test could send requests to an API and check how the server responds when many virtual users are running.

Example scenario:

Users: 100
Test Duration: 60 seconds
Request: GET /products
Expected: Fast response with minimal errors

The important thing is not just sending requests. We also need to check response time, errors, and how the server behaves as the load increases.

What Should You Check?

• Response time
• Number of requests
• Error rate
• Server performance
• CPU and memory usage
• Database performance
• Network performance

Tools such as Chrome DevTools and PageSpeed Insights can also help investigate web-page performance. testautomationu.applitools.com

Types of Load Tests

Stress Test: Push the system beyond its normal capacity.

Soak Test: Run the system under load for a long time.

Benchmark Test: Measure performance quickly and compare results over time. testautomationu.applitools.com

Conclusion

Performance testing helps make applications fast and responsive, while load testing helps us understand whether they can handle real-world traffic.

Start with a small test, understand the results, and gradually increase the load.

Keep Learning with BhauAutomation!