Added ab

Author: Andrey Soldatenko

README.md

@@ -7,4 +7,5 @@ A collection of awesome performance testing resources
 * [Apache Jmeter](http://jmeter.apache.org/) - is an Apache project that can be used as a load testing tool for analyzing and measuring the performance of a variety of services, with a focus on web applications.
 * [Yandex.Tank](https://github.com/yandex/yandex-tank) - is an extendable open source load testing tool for advanced linux users which is especially good as a part of automated load testing suit.
 * [YSlow](http://yslow.org/) - analyzes web pages and why they're slow based on Yahoo!'s rules for high performance web sites.
-* [PageSpeed](https://developers.google.com/speed/pagespeed/) - Fast and optimized pages lead to higher visitor engagement, retention, and conversions. The PageSpeed family of tools is designed to help you optimize the performance of your website. PageSpeed Insights products will help you identify performance best practices that can be applied to your site, and PageSpeed optimization tools can help you automate the <process class=""></process>
+* [PageSpeed](https://developers.google.com/speed/pagespeed/) - Fast and optimized pages lead to higher visitor engagement, retention, and conversions. The PageSpeed family of tools is designed to help you optimize the performance of your website. PageSpeed Insights products will help you identify performance best practices that can be applied to your site, and PageSpeed optimization tools can help you automate.
+* [ApacheBench](http://httpd.apache.org/docs/2.2/programs/ab.html) - (ab) is a single-threaded command line computer program for measuring the performance of HTTP web servers.[1] Originally designed to test the Apache HTTP Server, it is generic enough to test any web server.