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Locust

Define user behaviour with Python code, and swarm your system with millions of simultaneous users
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What is Locust?

Locust is an easy-to-use, distributed, user load testing tool. Intended for load testing web sites (or other systems) and figuring out how many concurrent users a system can handle.
Locust is a tool in the Load and Performance Testing category of a tech stack.
Locust is an open source tool with 23.8K GitHub stars and 2.9K GitHub forks. Here’s a link to Locust's open source repository on GitHub

Who uses Locust?

Companies
36 companies reportedly use Locust in their tech stacks, including Trendyol Group, Craftbase, and Samba Tech.

Developers
128 developers on StackShare have stated that they use Locust.

Locust Integrations

Pros of Locust
15
Hackable
11
Supports distributed
7
Open source
6
Easy to use
6
Easy to setup
4
Fast
2
Test Anything
Decisions about Locust

Here are some stack decisions, common use cases and reviews by companies and developers who chose Locust in their tech stack.

Needs advice
on
k6k6
and
LocustLocust

We're using Locust for load testing and k6. I came across k6 and I like JavaScript, please suggest which is better for API testing k6 or Locust?

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Needs advice
on
GatlingGatling
and
LocustLocust

I am looking for a performance testing tool that I can use for testing the documents accessed by many users simultaneously. I also want to integrate Jenkins with the performance automation tool. I am not able to decide which shall I choose Gatling or Locust. But for me, Jenkins integration is important. I am looking for suggestions for this scenario.

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Vrashab Jian
Needs advice
on
Flood IOFlood IOGatlingGatling
and
LocustLocust

I have to run a multi-user load test and have test scripts developed in Gatling and Locust.

I am planning to run the tests with Flood IO, as it allows us to create a custom grid. They support Gatling. Did anyone try Locust tests? I would prefer not to use multiple infra providers for running these tests!

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Locust's Features

  • Define user behaviour in code
  • Distributed & scalable
  • Proven & battle tested

Locust Alternatives & Comparisons

What are some alternatives to Locust?
Cicada Shell
It is a simple bash-like Unix shell written in Rust.
Grasshopper
Sound more professional and stay connected with Grasshopper, the Virtual Phone System designed for entrepreneurs. Grasshopper works just like a traditional phone system, but requires no hardware to purchase or software to install.
Gatling
Gatling is a highly capable load testing tool. It is designed for ease of use, maintainability and high performance. Out of the box, Gatling comes with excellent support of the HTTP protocol that makes it a tool of choice for load testing any HTTP server. As the core engine is actually protocol agnostic, it is perfectly possible to implement support for other protocols. For example, Gatling currently also ships JMS support.
k6
It is a developer centric open source load testing tool for testing the performance of your backend infrastructure. It’s built with Go and JavaScript to integrate well into your development workflow.
JavaScript
JavaScript is most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic,and supports object-oriented, imperative, and functional programming styles.
See all alternatives

Locust's Followers
315 developers follow Locust to keep up with related blogs and decisions.