In simple English
This tool sends many requests to a web server at the same time. It checks how fast the server replies under heavy traffic. While it runs, it draws a live moving chart directly in your terminal window. You can watch response times change second by second. When the test finishes, it prints a clear summary of the results.
What it is
A command-line program written in Rust that measures web server performance. It accepts a target web address and simulates multiple visitors using concurrent connections.
What it is good for
Solo builders who want to test if their web app can handle a sudden rush of visitors before launching.
- Shows a live visual animation in your terminal while the test runs.
- Supports HTTP/2 and experimental HTTP/3 connections.
- Can save test results directly to an SQLite database or export them as JSON.
- Requires Rust and a package manager to build from source if you do not use a prebuilt binary.
- High concurrency tests can exceed your operating system file descriptor limits if not adjusted.
- No built-in graphical user interface since it runs entirely inside a terminal.
manual testing with curl loops or heavy GUI load testing tools
tmux
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cargo install oha