What is Time to First Byte (TTFB)?
Definition
Time to First Byte (TTFB) measures the time between a browser requesting a page and receiving the first byte of the server's response. It reflects server processing time, network latency, and CDN efficiency. Google's target is under 800ms. High TTFB delays everything that loads after it.
Why Time to First Byte (TTFB) matters for Shopify stores
Shopify's infrastructure generally delivers excellent TTFB for standard storefronts — the platform runs on a global CDN. TTFB problems on Shopify stores usually stem from theme code doing excessive Liquid calculations, or third-party apps adding server-side processing to page rendering.
Shopify example
A store using a page builder app that generates Liquid dynamically has TTFB of 1.4s due to server-side template processing on every request. Switching to a standard theme with pre-compiled templates reduces TTFB to 280ms.
How Sauron handles Time to First Byte (TTFB)
Sauron's Lighthouse integration captures TTFB as part of the performance audit and flags stores with consistently high TTFB, helping merchants identify server-side bottlenecks.
See Product SEO on Autopilot feature →Common mistakes
- ✕ Heavy Liquid template logic that runs server-side on every page load
- ✕ Not using Shopify's CDN for assets — hosting images on external servers
- ✕ Third-party app middleware that adds latency to every storefront request
- ✕ Large session or cart data payloads being processed on each request
Automate your Shopify SEO
Understanding Time to First Byte (TTFB) is step one. Sauron handles the implementation — automatically, for your entire Shopify store.