Performance

7 posts in "Performance"

Script-Tag Supply-Chain Attacks in the Shopify Ecosystem

Old script tags from uninstalled apps are the perfect entry point for supply-chain attacks. The 2024 Polyfill.io case and how to protect yourself.

April 18, 2026Read More

Performance5 min

Cleaning settings_data.json Manually — And Why You Should Avoid It

settings_data.json stores Shopify app blocks. Manual editing is risky — a syntax error breaks the theme editor. Here's the safe way.

April 18, 2026Read More

Performance11 min

Optimize Shopify Core Web Vitals: Complete Guide to LCP, INP and CLS

Only 48% of Shopify stores pass Mobile Core Web Vitals. Complete guide to LCP, INP, CLS on Shopify — with concrete tuning measures.

April 18, 2026Read More

Performance9 min

Clean Up Your Shopify Theme: 12 Things To Do Today

The average Shopify store carries 251 KB of unused JavaScript per mobile page. 12 concrete cleanup steps — with tools and time estimates.

April 18, 2026Read More

Performance10 min

Ghost Code in Shopify: The Invisible Speed Killer (And How to Remove It)

Uninstalled an app but the code stays? Ghost code drags 150-500 KB of dead JavaScript through your theme. Here's how to find and remove it in 2026.

April 17, 2026Read More

Performance8 min

Why Your Shopify Store Is Slow After Uninstalling Apps (And How to Fix It)

Every app uninstall leaves traces that slow down your Shopify store. Why this happens, how to prove it, and how to fix it in under 3 minutes.

April 17, 2026Read More

Performance9 min

Shopify Performance: Why Your Store Is Slow and What You Can Do About It

Pages that load in 1 second convert 3x better than 5-second pages. 62% of all Shopify apps hurt performance. A data-driven guide to Shopify speed optimization.

June 24, 2025Read More