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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
86
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
62
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
50
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.14 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

3.14 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

54 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.19 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

5.73 s

Page Load Progression

461 ms
921 ms
1.4 s
1.8 s
2.3 s
2.8 s
3.2 s
3.7 s
Checks
17
9 PASS 4 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (356.8 KiB of 357.0 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
https://www.4.cn/img/award/dp.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.4.cn/img/award/jb.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.4.cn/img/award/pl.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.4.cn/img/flag/facebook.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.4.cn/img/award/icann.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.4.cn/img/flag/twitter.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 101 KB
0 oversized -0 KB
19 legacy format
6 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1095ms total JS execution
REVIEW
1095ms total JS execution
Warning::
https://www.4.cn/: 590ms CPU time
Warning::
Unattributable: 271ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-9PR2...: 140ms CPU time
Info::
https://www.4.cn/js/front/jquery.min.js: 92ms CPU time
Warning::
Third-party scripts: 1095ms (100% of total)

Main Thread Breakdown

Other 30% Style & Layout 24% Script Evaluation 23% Rendering 15% Script Parsing & Compilation 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.4.cn/590ms8ms4ms3rd
Unattributable271ms54ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-9PR2G0XLTH&cx=c&_slc=1140ms111ms29ms3rd
https://www.4.cn/js/front/jquery.min.js92ms50ms8ms3rd
B
JS Bundles
14 scripts, 64 KB unused
REVIEW
14 scripts, 64 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-9PR2...: 64 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 64 KB
64 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-9PR2G0XLTH&cx=c&_slc=1146 KB64 KB (44%)✓3rd
https://www.4.cn/js/front/jquery.duomai.min.js1 KB—✓3rd
https://www.4.cn/js/front/locale/dialog-en.min.js0 KB—✓3rd
https://www.4.cn/js/front/jquery.flexslider-min.js5 KB—✓3rd
https://www.4.cn/js/front/jquery.cxscroll.min.js1 KB—✓3rd
https://www.4.cn/js/front/jquery.index.min.js2 KB—✓3rd
https://www.4.cn/js/front/jquery.min.js32 KB—✓3rd
https://www.4.cn/js/front/locale/index-en.js1 KB—✓3rd
https://www.4.cn/js/front/punycode.js5 KB—✗3rd
https://www.4.cn/js/static/gt.js3 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
357 KB transferred, 47 requests
PASS
357 KB transferred, 47 requests
Info::
Page weighs 836 KB (357 KB transferred)
Info::
47 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
357 KB / 2.4 MB budget
357 KB transferred
47 requests
0.07 g CO2 per page load
JavaScript 218.5 KiB 61%
Images 101.1 KiB 28%
CSS 23.5 KiB 7%
HTML 11.4 KiB 3%
Other 1.5 KiB 0%
Other 544 B 0%
Other 460 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
47 resources · 357 KB · 64 KB savings available
PASS
47 resources · 357 KB · 64 KB savings available
Info::
Within 1MB page-weight target
Got: 357 KB
Info::
~64 KB of savings available
Warning::
46 third-party resources (100% of weight)
47 resources · 357.0 KiB · 46 third-party Within 1MB page-weight target
JavaScript 61% · 218.5 KiB
Image 29% · 102.4 KiB
CSS 7% · 23.5 KiB
Document 3% · 11.5 KiB
Other 0% · 1004 B

~63.9 KiB of savings available

Remove unused JavaScript: 63.9 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
47 requests over 3722ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 3.1 s LCP 3.1 shttps://4.cn// https://4.cn/ — 301 — 192 B — 582 ms — http/1.1https://www.4.cn/www.4.cn/ https://www.4.cn/ — 200 — 11.0 KiB — 705 ms — h2https://www.4.cn/img/index.csswww.4.cn/img/index.css https://www.4.cn/img/index.css — 200 — 4.1 KiB — 169 ms — h2https://www.4.cn/js/front/css/jquery.flexslider.csswww.4.cn/js/front/css/jquery.flexsl... https://www.4.cn/js/front/css/jquery.flexslider.css — 200 — 1.5 KiB — 170 ms — h2https://www.4.cn/img/html5-reset.csswww.4.cn/img/html5-reset.css https://www.4.cn/img/html5-reset.css — 200 — 1.1 KiB — 173 ms — h2https://www.4.cn/img/reset.csswww.4.cn/img/reset.css https://www.4.cn/img/reset.css — 200 — 790 B — 174 ms — h2https://www.4.cn/img/style.csswww.4.cn/img/style.css https://www.4.cn/img/style.css — 200 — 12.6 KiB — 175 ms — h2https://www.4.cn/js/front/css/jquery.dialog.csswww.4.cn/js/front/css/jquery.dialog... https://www.4.cn/js/front/css/jquery.dialog.css — 200 — 1.7 KiB — 176 ms — h2https://www.4.cn/img/en/style.csswww.4.cn/img/en/style.css https://www.4.cn/img/en/style.css — 200 — 1.7 KiB — 332 ms — h2https://www.4.cn/js/front/jquery.min.jswww.4.cn/js/front/jquery.min.js https://www.4.cn/js/front/jquery.min.js — 200 — 31.8 KiB — 349 ms — h2https://www.4.cn/js/front/jquery.dialog.min.jswww.4.cn/js/front/jquery.dialog.min... https://www.4.cn/js/front/jquery.dialog.min.js — 200 — 1.8 KiB — 339 ms — h2https://www.4.cn/js/front/locale/dialog-en.min.jswww.4.cn/js/front/locale/dialog-en.... https://www.4.cn/js/front/locale/dialog-en.min.js — 200 — 345 B — 340 ms — h2https://www.4.cn/js/front/jquery.flexslider-min.jswww.4.cn/js/front/jquery.flexslider... https://www.4.cn/js/front/jquery.flexslider-min.js — 200 — 5.4 KiB — 341 ms — h2https://www.4.cn/js/front/jquery.cxscroll.min.jswww.4.cn/js/front/jquery.cxscroll.m... https://www.4.cn/js/front/jquery.cxscroll.min.js — 200 — 1.2 KiB — 342 ms — h2https://www.4.cn/js/front/jquery.index.min.jswww.4.cn/js/front/jquery.index.min.... https://www.4.cn/js/front/jquery.index.min.js — 200 — 1.8 KiB — 343 ms — h2https://www.4.cn/js/front/jquery.duomai.min.jswww.4.cn/js/front/jquery.duomai.min... https://www.4.cn/js/front/jquery.duomai.min.js — 200 — 1.1 KiB — 344 ms — h2https://www.4.cn/js/front/locale/index-en.jswww.4.cn/js/front/locale/index-en.j... https://www.4.cn/js/front/locale/index-en.js — 200 — 541 B — 345 ms — h2https://www.4.cn/js/front/punycode.jswww.4.cn/js/front/punycode.js https://www.4.cn/js/front/punycode.js — 200 — 4.7 KiB — 346 ms — h2https://www.4.cn/js/static/gt.jswww.4.cn/js/static/gt.js https://www.4.cn/js/static/gt.js — 200 — 2.6 KiB — 385 ms — h2https://www.4.cn/img/flag/facebook.gifwww.4.cn/img/flag/facebook.gif https://www.4.cn/img/flag/facebook.gif — 200 — 523 B — 386 ms — h2https://www.4.cn/img/flag/twitter.gifwww.4.cn/img/flag/twitter.gif https://www.4.cn/img/flag/twitter.gif — 200 — 529 B — 387 ms — h2https://www.4.cn/img/award/jb.gifwww.4.cn/img/award/jb.gif https://www.4.cn/img/award/jb.gif — 200 — 1.9 KiB — 169 ms — h2https://www.4.cn/img/award/pl.gifwww.4.cn/img/award/pl.gif https://www.4.cn/img/award/pl.gif — 200 — 2.0 KiB — 170 ms — h2https://www.4.cn/img/award/dp.gifwww.4.cn/img/award/dp.gif https://www.4.cn/img/award/dp.gif — 200 — 2.2 KiB — 171 ms — h2https://s141.cnzz.com/stat.php?id=853703&web_id=853703s141.cnzz.com/stat.php?id=853703&we... https://s141.cnzz.com/stat.php?id=853703&web_id=853703 — 200 — 370 B — 1.5 s — h2https://partner.domaining.com/Award/domaining-120x31.gifpartner.domaining.com/Award/domaini... https://partner.domaining.com/Award/domaining-120x31.gif — 200 — 2.9 KiB — 412 ms — http/1.1https://www.4.cn/img/award/icann.pngwww.4.cn/img/award/icann.png https://www.4.cn/img/award/icann.png — 200 — 2.7 KiB — 171 ms — h2https://www.4.cn/index/geowww.4.cn/index/geo https://www.4.cn/index/geo — 200 — 317 B — 365 ms — h2https://www.4.cn/img/btn.gifwww.4.cn/img/btn.gif https://www.4.cn/img/btn.gif — 200 — 7.2 KiB — 168 ms — h2https://www.4.cn/img/grey-list-ul-bg.gifwww.4.cn/img/grey-list-ul-bg.gif https://www.4.cn/img/grey-list-ul-bg.gif — 200 — 367 B — 170 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 3.1 s LCP 3.1 shttps://4.cn// https://4.cn/ — 301 — 192 B — 582 ms — http/1.1https://www.4.cn/www.4.cn/ https://www.4.cn/ — 200 — 11.0 KiB — 705 ms — h2https://www.4.cn/img/index.csswww.4.cn/img/index.css https://www.4.cn/img/index.css — 200 — 4.1 KiB — 169 ms — h2https://www.4.cn/js/front/css/jquery.flexslider.csswww.4.cn/js/front/css/jquery.flexsl... https://www.4.cn/js/front/css/jquery.flexslider.css — 200 — 1.5 KiB — 170 ms — h2https://www.4.cn/img/html5-reset.csswww.4.cn/img/html5-reset.css https://www.4.cn/img/html5-reset.css — 200 — 1.1 KiB — 173 ms — h2https://www.4.cn/img/reset.csswww.4.cn/img/reset.css https://www.4.cn/img/reset.css — 200 — 790 B — 174 ms — h2https://www.4.cn/img/style.csswww.4.cn/img/style.css https://www.4.cn/img/style.css — 200 — 12.6 KiB — 175 ms — h2https://www.4.cn/js/front/css/jquery.dialog.csswww.4.cn/js/front/css/jquery.dialog... https://www.4.cn/js/front/css/jquery.dialog.css — 200 — 1.7 KiB — 176 ms — h2https://www.4.cn/img/en/style.csswww.4.cn/img/en/style.css https://www.4.cn/img/en/style.css — 200 — 1.7 KiB — 332 ms — h2https://www.4.cn/js/front/jquery.min.jswww.4.cn/js/front/jquery.min.js https://www.4.cn/js/front/jquery.min.js — 200 — 31.8 KiB — 349 ms — h2https://www.4.cn/js/front/jquery.dialog.min.jswww.4.cn/js/front/jquery.dialog.min... https://www.4.cn/js/front/jquery.dialog.min.js — 200 — 1.8 KiB — 339 ms — h2https://www.4.cn/js/front/locale/dialog-en.min.jswww.4.cn/js/front/locale/dialog-en.... https://www.4.cn/js/front/locale/dialog-en.min.js — 200 — 345 B — 340 ms — h2https://www.4.cn/js/front/jquery.flexslider-min.jswww.4.cn/js/front/jquery.flexslider... https://www.4.cn/js/front/jquery.flexslider-min.js — 200 — 5.4 KiB — 341 ms — h2https://www.4.cn/js/front/jquery.cxscroll.min.jswww.4.cn/js/front/jquery.cxscroll.m... https://www.4.cn/js/front/jquery.cxscroll.min.js — 200 — 1.2 KiB — 342 ms — h2https://www.4.cn/js/front/jquery.index.min.jswww.4.cn/js/front/jquery.index.min.... https://www.4.cn/js/front/jquery.index.min.js — 200 — 1.8 KiB — 343 ms — h2https://www.4.cn/js/front/jquery.duomai.min.jswww.4.cn/js/front/jquery.duomai.min... https://www.4.cn/js/front/jquery.duomai.min.js — 200 — 1.1 KiB — 344 ms — h2https://www.4.cn/js/front/locale/index-en.jswww.4.cn/js/front/locale/index-en.j... https://www.4.cn/js/front/locale/index-en.js — 200 — 541 B — 345 ms — h2https://www.4.cn/js/front/punycode.jswww.4.cn/js/front/punycode.js https://www.4.cn/js/front/punycode.js — 200 — 4.7 KiB — 346 ms — h2https://www.4.cn/js/static/gt.jswww.4.cn/js/static/gt.js https://www.4.cn/js/static/gt.js — 200 — 2.6 KiB — 385 ms — h2https://www.4.cn/img/flag/facebook.gifwww.4.cn/img/flag/facebook.gif https://www.4.cn/img/flag/facebook.gif — 200 — 523 B — 386 ms — h2https://www.4.cn/img/flag/twitter.gifwww.4.cn/img/flag/twitter.gif https://www.4.cn/img/flag/twitter.gif — 200 — 529 B — 387 ms — h2https://www.4.cn/img/award/jb.gifwww.4.cn/img/award/jb.gif https://www.4.cn/img/award/jb.gif — 200 — 1.9 KiB — 169 ms — h2https://www.4.cn/img/award/pl.gifwww.4.cn/img/award/pl.gif https://www.4.cn/img/award/pl.gif — 200 — 2.0 KiB — 170 ms — h2https://www.4.cn/img/award/dp.gifwww.4.cn/img/award/dp.gif https://www.4.cn/img/award/dp.gif — 200 — 2.2 KiB — 171 ms — h2https://s141.cnzz.com/stat.php?id=853703&web_id=853703s141.cnzz.com/stat.php?id=853703&we... https://s141.cnzz.com/stat.php?id=853703&web_id=853703 — 200 — 370 B — 1.5 s — h2https://partner.domaining.com/Award/domaining-120x31.gifpartner.domaining.com/Award/domaini... https://partner.domaining.com/Award/domaining-120x31.gif — 200 — 2.9 KiB — 412 ms — http/1.1https://www.4.cn/img/award/icann.pngwww.4.cn/img/award/icann.png https://www.4.cn/img/award/icann.png — 200 — 2.7 KiB — 171 ms — h2https://www.4.cn/index/geowww.4.cn/index/geo https://www.4.cn/index/geo — 200 — 317 B — 365 ms — h2https://www.4.cn/img/btn.gifwww.4.cn/img/btn.gif https://www.4.cn/img/btn.gif — 200 — 7.2 KiB — 168 ms — h2https://www.4.cn/img/grey-list-ul-bg.gifwww.4.cn/img/grey-list-ul-bg.gif https://www.4.cn/img/grey-list-ul-bg.gif — 200 — 367 B — 170 ms — h2https://www.4.cn/img/gradient-bg.gifwww.4.cn/img/gradient-bg.gif https://www.4.cn/img/gradient-bg.gif — 200 — 4.2 KiB — 170 ms — h2https://www.4.cn/img/banana.gifwww.4.cn/img/banana.gif https://www.4.cn/img/banana.gif — 200 — 4.9 KiB — 172 ms — h2https://www.4.cn/img/basic.gifwww.4.cn/img/basic.gif https://www.4.cn/img/basic.gif — 200 — 9.1 KiB — 173 ms — h2https://www.4.cn/img/en/logo_2x.pngwww.4.cn/img/en/logo_2x.png https://www.4.cn/img/en/logo_2x.png — 200 — 19.6 KiB — 174 ms — h2https://www.4.cn/img/en/entrust-buy-tit-en.pngwww.4.cn/img/en/entrust-buy-tit-en.... https://www.4.cn/img/en/entrust-buy-tit-en.png — 200 — 4.1 KiB — 175 ms — h2https://www.4.cn/img/en/phone_2x.jpgwww.4.cn/img/en/phone_2x.jpg https://www.4.cn/img/en/phone_2x.jpg — 200 — 27.0 KiB — 340 ms — h2https://www.4.cn/img/num.gifwww.4.cn/img/num.gif https://www.4.cn/img/num.gif — 200 — 3.9 KiB — 335 ms — h2https://www.4.cn/img/account.pngwww.4.cn/img/account.png https://www.4.cn/img/account.png — 200 — 3.1 KiB — 336 ms — h2https://www.4.cn/img/fenge.pngwww.4.cn/img/fenge.png https://www.4.cn/img/fenge.png — 200 — 2.9 KiB — 338 ms — h2https://seal.geotrust.com/getgeotrustsslseal?host_name=www.4.cn&size=S&lang=enseal.geotrust.com/getgeotrustsslsea... https://seal.geotrust.com/getgeotrustsslseal?host_name=www.4.cn&size=S&lang=en — -1 — 0 B — 39 ms — https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 82 ms — h2https://www.4.cn/js/front/css/images/bg_direction_nav.pngwww.4.cn/js/front/css/images/bg_dir... https://www.4.cn/js/front/css/images/bg_direction_nav.png — 200 — 2.0 KiB — 168 ms — h2https://www.google-analytics.com/j/collect?v=1&_v=j102&a=455689592&t=pageview&_s=1&dl=https%3A%2F%2Fwww.4.cn%2F&ul=en-us&dt=4.CN%20-%20Buy%2C%20Sell%20%26%20Park%20Domain%20Names&sr=412x823&vp=980x1957&_u=IEBAAEABAAAAACAAI~&jid=100579562&gjid=1043937593&cid=1049441175.1776817179&tid=UA-101238353-1&_gid=503137242.1776817179&_r=1&_slc=1&z=1171915474www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=455689592&t=pageview&_s=1&dl=https%3A%2F%2Fwww.4.cn%2F&ul=en-us&dt=4.CN%20-%20Buy%2C%20Sell%20%26%20Park%20Domain%20Names&sr=412x823&vp=980x1957&_u=IEBAAEABAAAAACAAI~&jid=100579562&gjid=1043937593&cid=1049441175.1776817179&tid=UA-101238353-1&_gid=503137242.1776817179&_r=1&_slc=1&z=1171915474 — 200 — 460 B — 24 ms — h2https://www.googletagmanager.com/gtag/js?id=G-9PR2G0XLTH&cx=c&_slc=1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-9PR2G0XLTH&cx=c&_slc=1 — 200 — 146.0 KiB — 161 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-9PR2G0XLTH&gtm=45je64h1h1v9112234534za20g&_p=1776817179051&gcd=13l3l3l2l2l1&npa=0&dma_cps=a&dma=1&_eu=EBAI&are=1&cid=1049441175.1776817179&frm=0&ir=1&pscdl=noapi&rcb=18&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938468~117266400~117512543&dl=https%3A%2F%2Fwww.4.cn%2F&dt=4.CN%20-%20Buy%2C%20Sell%20%26%20Park%20Domain%20Names&sid=1776817179&sct=1&seg=0&_tu=wAQ&en=page_view&_fv=1&_ss=1&_ee=1&tfd=3542region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-9PR2G0XLTH&gtm=45je64h1h1v9112234534za20g&_p=1776817179051&gcd=13l3l3l2l2l1&npa=0&dma_cps=a&dma=1&_eu=EBAI&are=1&cid=1049441175.1776817179&frm=0&ir=1&pscdl=noapi&rcb=18&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938468~117266400~117512543&dl=https%3A%2F%2Fwww.4.cn%2F&dt=4.CN%20-%20Buy%2C%20Sell%20%26%20Park%20Domain%20Names&sid=1776817179&sct=1&seg=0&_tu=wAQ&en=page_view&_fv=1&_ss=1&_ee=1&tfd=3542 — 204 — 544 B — 85 ms — h2https://www.4.cn/img/favicon.icowww.4.cn/img/favicon.ico https://www.4.cn/img/favicon.ico — 200 — 1.3 KiB — 168 ms — h2https://www.4.cn/img/favicon.icowww.4.cn/img/favicon.ico https://www.4.cn/img/favicon.ico — 200 — 0 B — 1 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1095ms · 189KB · ¥54/mo
www.4.cn
Other
Costly
Execution 590ms
Transfer 11 KB
Monthly Cost ¥29/mo
Unattributable
Other
Costly
Execution 271ms
Transfer 0 KB
Monthly Cost ¥13/mo
Google Tag Manager
Tag Manager
Optional
Execution 140ms
Transfer 146 KB
Unused 44%
Monthly Cost ¥7/mo
www.4.cn
Other
Optional
Execution 92ms
Transfer 32 KB
Monthly Cost ¥5/mo

These scripts may cost more than they're worth

  • www.4.cn adds 590ms and costs ~¥29/month
  • Unattributable adds 271ms and costs ~¥13/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.4.cn takes 590ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 271ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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