Locust is an easy to use, scriptable and scalable performance testing tool.
You define the behaviour of your users in regular Python code, instead of using a clunky UI or domain specific language. Locust is completely event-based, and therefore it’s possible to support thousands of concurrent users on a single machine. In contrast to many other event-based apps it doesn’t use callbacks.
This makes Locust infinitely expandable and very developer friendly.
- Write user test scenarios in plain-old Python. There’s no need for clunky UIs or bloated XML. Just plain code. This enables you to write your tests like normal (blocking) Python code instead of having to use callbacks or some other mechanism.
- Distributed & Scalable – supports running load tests distributed over multiple machines, and can therefore be used to simulate millions of simultaneous users
- Web-based UI – user friendly interface that shows the progress of your test in real-time. You can even change the load while the test is running. It can also be run without the UI, making it easy to use for CI/CD testing.
- Can test any system – Locust primarily works with web sites/services, it can be used to test almost any system or protocol
- Used to simulate millions of simultaneous users.
- Small and very flexible.
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