Locust: Load test your REST API

Recently, I wanted to load test one of my applications. In my previous projects, I have used Apache JMeter and Gatling. Both of them are great tools but I wanted something with ease of Apache Benchmark and web user interface. In my limited experience with Gatling and JMeter, I found that it takes time to get started with these tools. I don’t use these tools daily so there is always a learning curve for me.

My quest for an easy to use load testing tool lead me to Locust. It took me no time to get started with the tool and I was able to understand performance characteristics of my application by running a load test. I found Locust a great tool if you want to find how many request per second your system can support and how response time varies for different percentiles of requests.

Locust is an open source load testing tool written in Python. It can simulate millions of users to load test your application. It has an intuitive user interface that you can use to easily get started with it. It allows you to define custom behaviour using Python code.

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Gatling: The Ultimate Load Testing Tools for Programmers

Welcome to the tenth blog of 52 Technologies in 2016 blog series. Gatling is a high performance open source load testing tool built on top of Scala, Netty, and Akka. It is a next generation, modern load testing tools very different from existing tools like Apache JMeter. Load testing is conducted to understand behavior of an application under load. You put load on the application by simulating users and measure its response time to understand how application will behave under both normal and anticipated peak load conditions.

Gatling can be used to load test your HTTP server. HTTP is not the only protocol that one can load test with Gatling. Gatling also has inbuilt support for Web Socket and JMS protocols. You can extend Gatling to support your protocol of choice.

Load testing is often neglected by most software teams resulting in poor understanding of their application performance characteristics. These days most software teams take unit testing and functional testing seriously but still they ignore load testing. They write unit tests, integration tests, and functional tests and integrate them in their software build. I think part of the reason developer still don’t write load tests has to do with the fact that most load testing tools are GUI based so you can’t code your load tests. They allow you to export your load test as XML.

You can read full blog at https://github.com/shekhargulati/52-technologies-in-2016/blob/master/10-gatling/README.md