by David Addison
Large-scale studies have shown that conversions and revenue decrease as page load time increases, and Google knows that their users are generally less likely to bounce back to the SERPs from sites that load faster than their ranking competitors, so it makes perfect sense that Google would give faster websites a bump.
But what's Google's definition of "fast"? Their general guideline for average page load time is to keep it under two seconds.
Getting anywhere near that number will not happen just by chance of good web development work; there are several technical layers of potential inefficiencies that each require careful consideration and fine-tuning to achieve maximum performance from the entire web stack, and these will vary from site to site.
While I couldn't possibly hope to provide a comprehensive reference on website performance tuning in the scope of a blog about increasing your Googlebot crawl budget, what follows is a high-level overview of the broad scope of factors that have the potential to improve page speed in ways meaningful to Googlebot and pals.