wrk is a modern, command-line HTTP benchmarking tool engineered for high performance, capable of generating substantial load using a single multi-core CPU by leveraging multithreading and scalable event notification systems. An optional LuaJIT script can perform HTTP request generation, response processing, and custom reporting. Details are available in SCRIPTING and several examples are located in scripts. The machine running wrk must have a sufficient number of ephemeral ports available and closed sockets should be recycled quickly. To handle the initial connection burst the server's listen(2) backlog should be greater than the number of concurrent connections being tested.

Features

  • Multithreaded design for concurrent benchmarking using multiple cores
  • Uses efficient event notification backends like epoll and kqueue
  • Supports LuaJIT scripting for custom request generation and output processing
  • Effective at simulating heavy load on web servers
  • Simple command-line interface with powerful configuration options
  • Widely used for stress‑testing real‑world HTTP services

Project Samples

Project Activity

See All Activity >

Categories

Benchmark

License

MIT License

Follow wrk

wrk Web Site

Other Useful Business Software
Skillfully - The future of skills based hiring Icon
Skillfully - The future of skills based hiring

Realistic Workplace Simulations that Show Applicant Skills in Action

Skillfully transforms hiring through AI-powered skill simulations that show you how candidates actually perform before you hire them. Our platform helps companies cut through AI-generated resumes and rehearsed interviews by validating real capabilities in action. Through dynamic job specific simulations and skill-based assessments, companies like Bloomberg and McKinsey have cut screening time by 50% while dramatically improving hire quality.
Learn More
Rate This Project
Login To Rate This Project

User Reviews

Be the first to post a review of wrk!

Additional Project Details

Operating Systems

Linux, Mac, Windows

Programming Language

C

Related Categories

C Benchmark Software

Registered

2025-08-12