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Shopify fix guide

Slow Time to First Byte (TTFB) on Shopify

Time to First Byte exceeds 800ms, indicating slow server response. TTFB affects all other performance metrics as a bottleneck.

Issue ID: CWV-TTFB-001Severity: moderateEffort: M

Why this matters

Time to First Byte exceeds 800ms, indicating slow server response. TTFB affects all other performance metrics as a bottleneck. This affects load speed, Core Web Vitals, and how many visitors stay long enough to convert.

Shopify fix path

How to fix this on Shopify

Use theme settings, page settings, or theme code.

  1. 1Find the source of the issue in Shopify admin.
  2. 2Apply the change.
  3. 3Preview and publish.

After you fix it

  • Measure TTFB using WebPageTest or Chrome DevTools and confirm it is under 800ms

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