# What is ab?

*Development · Last updated: October 1, 2026*

> ApacheBench

A simple performance testing tool to measure how many people a web server can handle at the same time.

## Overview

ab is a classic command-line tool used to test the durability of your web servers. It allows you to see when your server will slow down or crash by sending thousands of virtual requests simultaneously. It is vital for understanding capacity, especially before launching a new site.

***Analogy:** It is like placing a simulation of a crowd of people in front of a newly opened cafe to understand how the cash register and waiters will react when hundreds of customers pile up at the door at the same time.*

## How it works

You run it by opening the terminal screen and typing the web address you want to test and the number of requests you want to send. When the test is finished, the tool reports to you how many requests per second were handled.

## Where it is used

It is frequently used in web server setups, performance tests, and system optimization processes.

## Commonly confused with

It should not be confused with advanced load testing tools or real browser automations; it measures purely raw server speed.

## Questions and answers

**Does it accurately reflect real user traffic?**

No, it only sends basic HTTP requests and does not simulate JavaScript operations on the browser.

## Related terms

- [ApacheBench (ab)](https://trescout.com/en/dictionary/apache-bench/)
- [Load Generator](https://trescout.com/en/dictionary/load-generator/)
- [CLI](https://trescout.com/en/dictionary/cli/)

## Related tools

- [HEY](https://trescout.com/en/discover/hey/)

This explanation was written in plain language for TreScout with AI and **machine-translated** from the Turkish original · the Turkish version prevails. If something looks wrong or missing, write to [hello@trescout.com](mailto:hello@trescout.com). [Read in Turkish →](https://trescout.com/dictionary/ab/)

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Source: TreScout Dictionary · https://trescout.com/en/dictionary/ab/