Top 3 JavaScript load-testing Projects

predator

1 563 0.0 JavaScript

A powerful open-source platform for load testing APIs.
postman-to-k6

2 206 6.0 JavaScript

Converts Postman collections to k6 script code (by apideck-libraries)

Project mention: Hurl 4.0.0 | news.ycombinator.com | 2023-06-30

Have you tried https://k6.io/ ? (Full disclosure: I'm one of the maintainers.)
It allows you to write load/performance tests in JS, commit them to your repo, easily automate them in CI, send metrics to several backends, use protocols besides HTTP, with a modern CLI, and many more features.
There's also a Postman-to-k6 converter[1]. The conversion might not be perfect, but it will give you a head start.
Note that the k6 philosophy is for developers to write these tests, similarly to how you write unit/integration tests, and to break the classic QA-dev cycle.
I don't want to steal Hurl's thunder, it does look great, but it's limited in features compared to existing peformance testing tools, and I'd personally rather write tests in a programming language, than in a bespoke text format.
[1]: https://github.com/apideck-libraries/postman-to-k6

SurveyJS

surveyjs.io sponsored

Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
k6-examples

1 1 1.8 JavaScript

Project using K6 and Javascript to create scenarios of Load and Stress Test

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).