By Robert Castley

YouTube UK successfully achieved a 100% success rate this month and was the only site that had perfect availability of its home page. YouTube also had an impressive download speed of 1.29 seconds, putting it in third place for March. Given that YouTube UK’s home page comprises of such a large amount of rich content, this site performance compared to other sites on the list is admirable. Facebook continued to have a particularly quick response time and was once again the only social networking site to load in less than a second on average, at 0.61 seconds. The index average was under two seconds with only three sites falling below this month – MySpace, Hi5 and Bebo.

About the author and the company

Robert Castley has been solutions consultant at Keynote for nearly two years. Prior to working at Keynote, Robert worked as a Professional Services Consultant at a document management company, Macro 4, where he worked on developing custom web interfaces.

Keynote Systems is the global leader in Internet and mobile cloud monitoring. Founded in 1995, Keynote provides testing, monitoring and measurement products and services for any enterprise including online portals, e-commerce sites, B2B sites, mobile operators and mobile infrastructure providers, in four areas: Web performance, mobile quality, streaming and real user experience testing.