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Advanced Page Speed Test

Core Web Vitals Analysis - Mobile & Desktop

Result for: facebook.com

Tested at: 2026-04-21 00:40:20

📱 Mobile Insights
85

优秀

First Contentful Paint 0.62s Good
Largest Contentful Paint 0.8s Good
Cumulative Layout Shift 0.03 Good
Total Blocking Time 500ms Poor
Speed Index 0.55s Good

⏱️ Timing Breakdown

DNS
Connect
SSL
Server
Download
DNS Lookup6ms
TCP Connection9ms
SSL Handshake7ms
Server Response (TTFB)514ms
Content Download170ms
Total684ms

📄 Page Info

Page Size 221 KB
HTTP Status 200

⚠️ Issues Found

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Render Blocking Resources

6 CSS/JS files block rendering

Impact: High
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Too Many Scripts

13 JS files, consider bundling

Impact: Medium
🖥️ Desktop Insights
85

优秀

First Contentful Paint 0.5s Good
Largest Contentful Paint 0.73s Good
Cumulative Layout Shift 0.01 Good
Total Blocking Time 500ms Poor
Speed Index 0.52s Good

⏱️ Timing Breakdown

DNS
Connect
SSL
Server
Download
DNS Lookup3ms
TCP Connection6ms
SSL Handshake7ms
Server Response (TTFB)413ms
Content Download237ms
Total649ms

📄 Page Info

Page Size 431 KB
HTTP Status 200

⚠️ Issues Found

⚠️

Render Blocking Resources

53 CSS/JS files block rendering

Impact: High
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Too Many Scripts

51 JS files, consider bundling

Impact: Medium