This chapter explains theme performance—why it’s important, how to measure it, and how to improve it. It discussed techniques that we can use to both reduce initial load times and improve the perceived responsiveness of a Shopify storefront.
While it pays dividends to be thinking about these ideas from day one of your theme design, the techniques discussed here are equally useful for existing themes that need some fat trimmed.
Why Performance Matters
Way, way back in the olden days of the web (2009), Eric Schurman at Bing and Jake Brutlag at Google ran a series of experiments ...