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wrk2

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description wrk2 Overview

Wrk2 is an open source command-line application used for load testing websites and web applications. It measures key metrics like latency and throughput, helping developers identify performance bottlenecks related to network requests, server response times, and asset delivery. Primarily intended for system administrators, DevOps engineers, and web development teams seeking to benchmark website speed and optimize their online resources.

help wrk2 FAQ

What is the difference between wrk and wrk2?

While standard wrk is an excellent load testing tool, wrk2 was specifically forked to add support for a corrected coordination algorithm. Wrk2 is designed to prevent the "Coordinated Omission" problem that plagues standard latency testing under high throughput.

How do I install wrk2 on Linux?

Wrk2 can be installed by cloning its GitHub repository and compiling it from source using a C compiler like GCC and the standard make utility. Most Linux distributions require you to install the `openssl-dev` or `libssl-dev` packages beforehand.

What command-line arguments does wrk2 require to run a test?

A standard wrk2 command requires specifying the connections (-c), threads (-t), and duration (-d), but it uniquely requires the rate flag (-R) to set the constant throughput. You also must provide the target URL at the end of the command to execute the test.

Can wrk2 test POST requests or custom HTTP headers?

Yes, wrk2 allows you to pass a custom Lua script using the `-s` flag to define complex POST bodies and specific HTTP headers. This allows developers to authenticate and test complex API endpoints rather than just simple GET requests.

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