The Full-Stack Shopify Performance Checklist: Speed, Conversions, and Custom Development Done Right

Short summary

Shopify performance optimization requires fixing multiple layers—Liquid templates, images, third-party apps, and Core Web Vitals. Shopify handles 30% of load time; developers control the other 70% through browser rendering optimization. Key wins: flatten Liquid loops, use proper image sizing with fetchpriority, remove unused app scripts, and set font-display: optional to eliminate layout shift.

• •Optimize in layers: Liquid render logic (TTFB), image delivery (size/format/fetchpriority), app script bloat, and Core Web Vitals
• •30% of load time is Shopify's responsibility; focus optimization on the 70% you control in the browser
• •Specific fixes: flatten loops, use capture blocks, lazy-load images, fetchpriority on LCP elements, font-display: optional for zero CLS

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