The performance of a Web site can be monitored in several different ways. The most basic end-user performance metric comprises the entire time it takes from when a user requests the desired page until he or she can view that entire page on their Web browser. This time includes not only the network components such as DNS lookup, initial connection, and content download, but also any client-side execution of plug-ins and video, sounds, or animation.
When you measure client-side execution you need to use a real browser-monitoring product if you want to capture the complete end-user experience. WhyReal Browsers Matter
This user performance time also has two distinct versions: performance for a first-time visitor and performance for a returning visitor. Since returning visitors comprise the vast majority of traffic to a Web site, understanding which content is being cached and how the returning user is experiencing the site is critical.
The use of a real browser allows you to see the browser’s behavior for the returning user and validate that performance is being optimized for the returning user.
|2. Real tests use real devices|
3. Mobile device compatibility