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Locust

Write scalable load tests in plain Python 🚗💨.

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Page copy revised 25 Oct 2026 from public sources. Refresh checks the live site and, when this entry has a GitHub repository, the latest release.

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Introduction

Locust is an open source performance/load testing tool for HTTP and other protocols. Its developer-friendly approach lets you define your tests in regular Python code.

The latest GitHub release listed on 25 Oct 2026 was 2.47.0, published 2026-10-21.

Features

These items are quoted from public documentation fetched on 25 Oct 2026. Taken from repository README headings.

  1. Azure Load Testing: Azure offers a managed load-testing service that lets you run and scale Locust tests easily.

Pros

Points stated in the public sources fetched on 25 Oct 2026:

  1. Published license: The GitHub repository lists MIT License (MIT).
  2. Repository topics: The repository’s GitHub topics include benchmarking, http, load-generator, load-test, load-testing, load-tests, locust, performance.

Cons

The pages fetched on 25 Oct 2026 do not publish a limitations list. That absence is not evidence that the tool has no drawbacks. Current issues are tracked at https://github.com/locustio/locust/issues.

The repository README includes this example (from “Features”):

from locust import HttpUser, task, between

class QuickstartUser(HttpUser):
    wait_time = between(1, 2)

    def on_start(self):
        self.client.post("/login", json={"username": "foo", "password": "bar"})

    @task
    def hello_world(self):
        self.client.get("/hello")
        self.client.get("/world")

    @task(3)
    def view_item(self):
        for item_id in range(10):
            self.client.get(f"/item?id={item_id}", name="/item")

Resources:

Pricing

The fetched text says:

Locust is an open source performance/load testing tool for HTTP and other protocols.

No separate price list was found on 25 Oct 2026.

The fetched pages do not name a target audience. Decide fit from the official description and the feature list above.

Conclusion

Locust is summarized by its public description as: “Write scalable load tests in plain Python 🚗💨.”.

The latest GitHub release listed was 2.47.0, published 2026-10-21.

This page was rebuilt on 25 Oct 2026 from locust.cloud, github.com. It keeps only what those pages stated. Confirm the current product, license, and price on the official site before you adopt it.