In-browser testing has become a requirement for functional testing and Selenium is a tool for implementing these tests using real browsers.
NeoLoad, the professional load testing software, simulates large numbers of users using an application simultaneously, and allows you to analyze both the user response times and your infrastructure's statistics (database, Web server, network components, etc.)
NeoLoad integration with Selenium provides two main benefits:
The measurement of the time elapsed on the end-user side is based on the W3C Navigation Timing library.
Information: For more information about Selenium, see http://www.seleniumhq.org.