This just isn't true at all. The amount of time it takes to download, parse, and execute modern JavaScript payloads is usually longer than a page's TTFB. Then t

This just isn't true at all. The amount of time it takes to download, parse, and execute modern JavaScript payloads is usually longer than a page's TTFB. Then there is also the parsing of HTML and CSS and actually painting the page. For "most websites" if cached appropriately then server CPU time is minimal in most cases