hey is described as 'HTTP load generator, ApacheBench (ab) replacement, formerly known as rakyll/boom' and is a Benchmark tool in the os & utilities category. There are eight alternatives to hey for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and Web-based apps. The best hey alternative is Apache JMeter, which is both free and Open Source. Other great apps like hey are locust, Gatling.io, Apache Benchmark and HailStorm.
Apache JMeter is an open source Java application, designed to load test functional behavior and measure performance. Originally designed for testing Web Applications, it has since expanded to other test functions as well.
An open source load testing tool written in Python. Locust allows you to define user behaviour with Python code, and swarm your system with millions of simultaneous users.
ab is a tool for benchmarking your web server. It is designed to give you an impression of how your current web server installation performs. This especially shows you how many requests per second your web server installation is capable of serving.
Kraken is a load testing IDE. Kraken provides a complete development environment to software programmers and load testers that seek to make the most out of Gatling.
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