It is no secret that Google likes fast pages and sites. Here are 300 articles on the topic from the Google Webmaster Central Blog. It is further no secret that fast page load times are correlated with higher sales, as this Kissmetrics blog post outlines. At Panjo where any enthusiast community can build a marketplace, sellers go to great lengths to extensively photograph their listings and describe the items they are selling in tremendous detail. We go to great lengths to render those pages as beautifully, mobile-responsively, and quickly as possible. We recently reduced page load time 30% in under two days of work.
To get started, we turned to these two resources: https://developers.google.com/speed/pagespeed/insights/ https://developers.google.com/speed/docs/insights/rules