I was having trouble getting the benchmark times to display. With Jasmin's help, I now see my site's benchmarks. Here's how...
In your browser's address bar type in:
http://www.yourdomain.com/home.php?benchmark=y
Replace yourdomain.com with the domain name of your X-cart store. Make sure you use the full path to the page you want to test. I tried the original,
http://www.yourdomain.com?benchmark=y and that didn't work for me, because the index.php page redirects to the home.php page.
Once you type in your Domain and Full Page Path plus the Question Mark and the Benchmark equals Yes, then hit your Enter/Return key and let the page load. Everything looks normal at this point. Now, you need to go to your browser's menu bar and select View Page Source Code. Scroll down to the bottom of the source code and you will see the page load times listed in an HTML comment.
Hope that helps anyone else trying to view their page load times. Jasmin, thanks again for your how-to tips.
Robert