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Advanced Page Speed Test

Core Web Vitals Analysis - Mobile & Desktop

Result for: amazon.com

Tested at: 2026-04-20 23:14:51

📱 Mobile Insights
92

优秀

First Contentful Paint 1.55s Good
Largest Contentful Paint 1.5s Good
Cumulative Layout Shift 0.05 Good
Total Blocking Time 180ms Needs Work
Speed Index 1.05s Good

⏱️ Timing Breakdown

DNS
Connect
SSL
Server
Download
DNS Lookup3ms
TCP Connection346ms
SSL Handshake338ms
Server Response (TTFB)1294ms
Content Download19ms
Total1313ms

📄 Page Info

Page Size 5 KB
HTTP Status 200

⚠️ Issues Found

⚠️

Render Blocking Resources

1 CSS/JS files block rendering

Impact: High
⚠️

Images Without Dimensions

2 images missing width/height (causes CLS)

Impact: High
⚠️

Slow Server Response

1294ms TTFB

Impact: High
🖥️ Desktop Insights
92

优秀

First Contentful Paint 1.21s Good
Largest Contentful Paint 1.21s Good
Cumulative Layout Shift 0.05 Good
Total Blocking Time 180ms Needs Work
Speed Index 0.81s Good

⏱️ Timing Breakdown

DNS
Connect
SSL
Server
Download
DNS Lookup3ms
TCP Connection257ms
SSL Handshake263ms
Server Response (TTFB)1011ms
Content Download0ms
Total1011ms

📄 Page Info

Page Size 5 KB
HTTP Status 200

⚠️ Issues Found

⚠️

Render Blocking Resources

1 CSS/JS files block rendering

Impact: High
⚠️

Images Without Dimensions

2 images missing width/height (causes CLS)

Impact: High
⚠️

Slow Server Response

1011ms TTFB

Impact: High