Load Scripts After Rendering to Improve Page Speed
Consider embedding scripts so that they load after the page has rendered to improve load time, especially if it is only required for functionality.
Google Will Determine Page Speed Based On User Experience
Google’s mobile speed update will use a number of different factors to determine speed, including some metrics from Chrome that provide information about actual user experience. This means that you should optimise your site to be faster for users and not just Googlebot.
Use Pre-rendering for Mobile to Avoid Issues with Google’s Speed Update
Google’s Mobile Speed Update Will Only Apply to Mobile Search Results
The Mobile Speed Update will only apply to mobile search results so desktop results won’t be affected.
Google Looks at Overall Picture When Assessing Site Speed
Google looks at the overall picture when assessing site speed because optimising for individual metrics such as Time to first byte (TTFB) might not acually improve the overall experience for users.
Separate Mobile Sites Need to be Crawlable at the Same Speed as Desktop
Separate mobile sites need to be able to be crawled at the same speed as on desktop so if your separate mobile site is hosted on a slower server then this will affect Google’s ability to rank it after mobile-first rolls out.
Mobile Page Speed Ranking Factor Will Use Similar Metrics to Google’s Page Speed Tools
Google’s page speed update for mobile search ranking will take into account metrics that map fairly well to Google’s existing tools, but won’t use them directly.
Mobile Page Speed Ranking Factor Will Only Affect Mobile Search Results Pages
Google’s page speed algorithm will only affect mobile search results pages, not desktop search results.