JMeter also has most of the features you'll need for a basic load test, and you don't have to code any of it up yourself. In many cases, the protocols your application uses may make the decision for you of which tool to use. The number of k6 community extensions, through xk6, is growing, but JMeter plugins still outnumber them. However, both tools allow the development of third-party plugins, adding support for more protocols. The protocols above are those that are natively supported. Web - HTTP/1.1, HTTP/2 (Java, NodeJS, PHP, ASP.NET, …).In contrast, k6 supports the following protocols: Message-oriented middleware (MOM) via JMS.Web - HTTP, HTTPS (Java, NodeJS, PHP, ASP.NET, …).Here's the official list of the protocols that JMeter supports: JMeter supports many protocols and features out of the box However, it isn't as fully-featured as JMeter. It's a way to create tests with a GUI interface, and despite its inclusion in k6 cloud, it doesn't require any subscription to use. K6 doesn't have a GUI packaged within the tool, but the k6 Test Builder is available for free. However, I'd argue that it's definitely easier for non-developers to explore a UI than a bit of code. He has a point there: UI is subjective to a certain degree. It takes a bit of exploring to realize that right clicking on the test plan, or going to Edit > Add, will show the "Add" menu that you need. None of the icons add elements to the test plan. I've always thought of JMeter as user-friendly, but a developer friend recently pointed out that the Test Plan screen that greets you when you first start JMeter doesn't provide any indication of how to create an HTTP sampler. A tool with a GUI will be less daunting for many testers that are used to the mostly no-code UIs of the likes of Postman or SOAPUI. Sometimes, if you're in a situation where people haven't done load testing before and need to learn a new tool, a GUI-driven tool like JMeter is simply the most frictionless option. Many testing teams make decisions on load testing tools based on this fact alone. The question that I want to answer here is: What situations does each tool excel in? When does JMeter excel? When you want to get started quickly JMeter has a GUI Everything depends on the situation your team is in: what, how, why, and when you're testing. This article isn't about which tool is better, because as much as we might prefer a clear-cut answer, there's no "best tool". Taking the opposite tack to JMeter, k6's main selling point is its code-based scripting and heavy prioritization of the developer experience. k6 is written in Go, but scripts are written in Javascript. LoadImpact had previously consisted of the SaaS platform (now k6 Cloud) and professional services. K6 is an open source load testing tool released by LoadImpact in 2017. At the time of this writing, the latest version of JMeter is 5.4. Although scripts can also be extended using code, majority of the scripting in JMeter is done using the UI. JMeter took what other companies were charging a lot of money for and published it online for everyone to use- for free. It was first released in 1998, and it made waves because of its audacity in taking on more popular but proprietary load testing tools. JMeter is an open source load testing tool built entirely in Java by the Apache Foundation. Secondly, I want to share my reasons for wanting to explore k6 as a load testing tool- the same reasons that ultimately convinced me to join the team that builds it. So what am I doing on the k6 site, talking about how much I love JMeter? Well, firstly, it turns out that the k6 team is pretty open and transparent, especially about potential improvements in k6. When I joined the k6 team in late November, the foremost question on my mind was "How does this compare to JMeter?" You see, I come from a performance testing consulting background, and in the last few years, JMeter has been far and away my tool of choice. Which tool is better for different situations.Things to consider when choosing a load testing tool.
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