Capture page load time in prop as mentioned in this article:
https://theblog.adobe.com/measuring-site-speed-in-adobe-analytics/s.prop1=s_getLoadTime();
This will assign the page load time, in tenths of a second, to prop1.
For example, if my page took 3.75 seconds to load, I would get a raw
value of 38 in the Page Load Time (prop1) report. So if you want to
capture the page load time in seconds. s.prop1=(s_getLoadTime()/10);