Tools to benchmark & load-test your code or services

• apachebench (ab) - Standalone apachebench (ab), Apache HTTP server benchmarking tool. C
• httperf - A tool for measuring web server performance. C
• hey - HTTP load generator, ab replacement. Go
• boom - A replacement for ab, written in Python.
• break - Like boom, but based on molotov. Python
• molotov - Simple Python 3.5+ tool to write load tests.
• phantomas - PhantomJS-based web performance metrics collector and monitoring tool. JavaScript
• ponos - Simple yet powerful load generator written in Erlang.
• siege - A HTTP load tester and benchmarking utility. C
• vegeta - HTTP load testing tool and library. Go
• sniper - Powerful and high-performance HTTP load tester, written in Go.
• wrk - Modern HTTP benchmarking tool. C
• go-wrk - A small heavy duty HTTP(S) benchmark tool, similar to wrk, but written in Go.
• drill - A HTTP load testing application, written in Rust, inspired by Ansible syntax.
• iago2 - A load generator, built for engineers (Twitter). Scala
• gohttpbench - An ab-like benchmark tool run on multi-core cpu. Go
• pronk - A small command line application for load testing web servers. Haskell
• slow_cooker - A load tester focused on lifecycle issues and long-running tests. Go
• k6 - A modern load testing tool, using Go and JavaScript.
• bender - An easy-to-use library for creating load testing applications (Pinterest). Go

• rpc-perf - A tool for benchmarking RPC services (Twitter). Rust
• tcpkali - Fast multi-core TCP and WebSockets load generator. C
• massive-attack - Load testing Thrift, made simple. Scala

Tools to stress-test your code or services

• hulken - Stress testing tool for everything speaking HTTP. JavaScript

• mqtt-stresser - Load testing tool to stress MQTT message broker. Go