description Locust Overview
Locust is a powerful open-source load testing tool written in Python. It's known for its flexibility, ease of use, and ability to scale horizontally by distributing tests across multiple machines. It uses Python code to define user behavior, making it ideal for simulating realistic user scenarios. Locust excels at testing web applications and APIs with high concurrency.
help Locust FAQ
What does a Locust test file look like?
A Locust test is usually a Python file named locustfile.py. You define user behavior with classes such as HttpUser and mark actions with @task.
Does Locust need a separate test scripting language?
No. Locust is written and configured in Python, so teams can use normal Python logic, libraries, loops, and fixtures inside their load tests.
How does Locust handle distributed load testing?
Locust can run in a master and worker setup, where multiple worker machines generate traffic under one coordinated test. That is useful when one laptop cannot create enough users or requests per second.
What is the Locust web UI used for?
Locust includes a browser UI commonly served on port 8089. From there you can start a swarm, set user count and spawn rate, and watch request failures, latency, and throughput.
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