This a modified version for Chrome Benchmark extension, including the timing measurement features for page load time, TLS tunnel setup time on client end, TCP setup time and client response time. The timing measurements are done using the navigation API --> http://www.html5rocks.com/en/tutorials/webperformance/basics/ . The reference to original chrome benchmark extension can be found here http://www.chromium.org/developers/design-documents/extensions/how-the-extension-system-works/chrome-benchmarking-extension