Locust
An open source load testing tool. Define user behaviour with Python code.
Overview
Locust is an easy-to-use, distributed, user load testing tool. It is intended for load-testing web sites (or other systems) and figuring out how many concurrent users a system can handle. The main feature is that you describe all your tests in Python code, which allows for complex and realistic user scenarios. It has a web-based UI for monitoring test results in real-time.
✨ Key Features
- Test scenarios written in plain Python
- Distributed and scalable, can simulate millions of users
- Web-based UI for real-time monitoring
- Can test any system, not just web apps
- Extensible with custom clients
🎯 Key Differentiators
- Uses standard Python for scripting, making it very flexible and accessible to Python developers
- Lightweight and easy to set up
- Good for simulating complex user behavior with code
Unique Value: Empowers developers to write expressive and complex load tests using the full power of Python, without the constraints of a GUI.
🎯 Use Cases (4)
✅ Best For
- Load testing e-commerce applications
- Simulating user behavior for large-scale web services
💡 Check With Vendor
Verify these considerations match your specific requirements:
- Teams with no Python experience
- Users who prefer a GUI-based script recorder
🏆 Alternatives
Unlike JMeter's XML-based test plans, Locust uses pure code, which is easier to version control. It's simpler to get started with than Gatling if the team is already proficient in Python.
💻 Platforms
✅ Offline Mode Available
🔌 Integrations
💰 Pricing
Free tier: Fully free and open-source.
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