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Advanced Page Speed Test

Core Web Vitals Analysis - Mobile & Desktop

Result for: github.com

Tested at: 2026-04-20 23:10:07

📱 Mobile Insights
70

良好

First Contentful Paint 0.47s Good
Largest Contentful Paint 0.59s Good
Cumulative Layout Shift 0.49 Poor
Total Blocking Time 500ms Poor
Speed Index 0.32s Good

⏱️ Timing Breakdown

DNS
Connect
SSL
Server
Download
DNS Lookup2ms
TCP Connection3ms
SSL Handshake4ms
Server Response (TTFB)390ms
Content Download5ms
Total396ms

📄 Page Info

Page Size 551 KB
HTTP Status 200

⚠️ Issues Found

⚠️

Render Blocking Resources

34 CSS/JS files block rendering

Impact: High
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Many Images

24 images found, consider lazy loading

Impact: Medium
⚠️

Images Without Dimensions

19 images missing width/height (causes CLS)

Impact: High
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Too Many Scripts

67 JS files, consider bundling

Impact: Medium
🖥️ Desktop Insights
70

良好

First Contentful Paint 0.01s Good
Largest Contentful Paint 0.22s Good
Cumulative Layout Shift 0.49 Poor
Total Blocking Time 500ms Poor
Speed Index 0.01s Good

⏱️ Timing Breakdown

DNS
Connect
SSL
Server
Download
DNS Lookup2ms
TCP Connection4ms
SSL Handshake3ms
Server Response (TTFB)12ms
Content Download5ms
Total17ms

📄 Page Info

Page Size 551 KB
HTTP Status 200

⚠️ Issues Found

⚠️

Render Blocking Resources

34 CSS/JS files block rendering

Impact: High
💡

Many Images

24 images found, consider lazy loading

Impact: Medium
⚠️

Images Without Dimensions

19 images missing width/height (causes CLS)

Impact: High
💡

Too Many Scripts

67 JS files, consider bundling

Impact: Medium