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https://west.cn

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
4
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
59
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

3.04 s

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

4.33 s

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

0 ms

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

0.016

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

6.56 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.

4.33 s

Page Load Progression

1.6 s
3.2 s
4.7 s
6.3 s
7.9 s
9.5 s
11.1 s
12.7 s
Checks
15
5 PASS 4 REVIEW 4 FIX
D
Page Weight Budget
Action
2.1 MB transferred, 145 requests
FIX
2.1 MB transferred, 145 requests
Info::
Page weighs 3.3 MB (2.1 MB transferred)
Warning::
Images are 1.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.6 MB
Warning::
145 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.44 g CO2 per page load
2.1 MB / 2.4 MB budget
2.1 MB transferred
145 requests
0.44 g CO2 per page load
Images 1.6 MiB 76%
JavaScript 395.6 KiB 19%
HTML 51.0 KiB 2%
CSS 44.3 KiB 2%
Other 9.6 KiB 0%
Other 1.5 KiB 0%
Other 567 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (2.1 MiB of 2.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
145 resources · 2.1 MB · 64 KB savings available
FIX
145 resources · 2.1 MB · 64 KB savings available
Warning::
Page weight 1.1 MB over 1MB target
Got: 2.1 MB Expected: ≤ 1 MB
Info::
~64 KB of savings available
Warning::
144 third-party resources (100% of weight)
145 resources · 2.1 MiB · 144 third-party 1.1 MiB over 1MB target
Image 77% · 1.6 MiB
JavaScript 19% · 395.6 KiB
Document 3% · 60.7 KiB
CSS 2% · 44.3 KiB
Other 0% · 567 B

~63.7 KiB of savings available

Remove unused JavaScript: 63.7 KiB
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
97 images, 0 KB saveable
REVIEW
97 images, 0 KB saveable
Warning::
https://www.west.cn/images2016/index/index-mail-ed... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/index-mail-fr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/aihuaju.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/gift.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/index-mail.jp... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/domain-jiaoyi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/tick-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/xyh_310x420.j... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/index-new_3.j... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/west_wx_qrcode.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/aizhan.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/more_1.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/index/index-new-ymh... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.west.cn/images2016/admin5.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
97 images 1.6 MB
0 oversized -0 KB
97 legacy format
14 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

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

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
1465ms total JS execution
REVIEW
1465ms total JS execution
Warning::
https://www.west.cn/js2016/lib/edge/edge.6.0.0.min...: 587ms CPU time
Warning::
https://www.west.cn/: 365ms CPU time
Warning::
https://www.west.cn/js2016/lib/jquery/jquery-1.11....: 270ms CPU time
Info::
Unattributable: 179ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=AW-104...: 64ms CPU time
Warning::
Third-party scripts: 1465ms (100% of total)

Main Thread Breakdown

Other 31% Script Evaluation 27% Rendering 20% Style & Layout 18%
ScriptTotalScriptingParse/CompileParty
https://www.west.cn/js2016/lib/edge/edge.6.0.0.min.js587ms113ms4ms3rd
https://www.west.cn/365ms3ms1ms3rd
https://www.west.cn/js2016/lib/jquery/jquery-1.11.3.min.js270ms167ms6ms3rd
Unattributable179ms1ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-104575755664ms54ms9ms3rd
B
JS Bundles
32 scripts, 64 KB unused
REVIEW
32 scripts, 64 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-104...: 64 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.west.cn/js2016/lib/jsencrypt.min.js: unminified — 4 KB could be saved
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=AW-1045757556166 KB64 KB (38%)✓3rd
https://www.west.cn/js2016/lib/require/require.config.js?202604211233 KB—✓3rd
https://zz.bdstatic.com/linksubmit/push.js1 KB—✓3rd
https://www.west.cn/js2016/lib/jsencrypt.min.js19 KB—✗3rd
https://www.west.cn/js2016/lib/jquery.SuperSlide/jquery.SuperSlide.2.1.1.x.js4 KB—✓3rd
https://www.west.cn/js2016/root/jqinclude.js?t=20260421123a1 KB—✓3rd
https://www.west.cn/jscripts/config/config.js?t=202604211235 KB—✗3rd
https://www.west.cn/js2016/lib/layer/layer.js6 KB—✓3rd
https://www.west.cn/js2016/common/common.js1 KB—✓3rd
https://www.west.cn/js2016/lib/countUp/countUp.js2 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+
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
Network Waterfall
145 requests over 12642ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 3.0 s LCP 4.3 shttps://west.cn// https://west.cn/ — 301 — 79 B — 818 ms — h2https://www.west.cn/www.west.cn/ https://www.west.cn/ — 200 — 51.0 KiB — 1.2 s — http/1.1https://www.west.cn/css2016/global.css?t=202604211230726www.west.cn/css2016/global.css?t=20... https://www.west.cn/css2016/global.css?t=202604211230726 — 200 — 11.6 KiB — 569 ms — http/1.1https://www.west.cn/css2016/common.css?t=20260421123www.west.cn/css2016/common.css?t=20... https://www.west.cn/css2016/common.css?t=20260421123 — 200 — 2.4 KiB — 682 ms — http/1.1https://www.west.cn/js2016/lib/jquery.SuperSlide/superslider.css?t=20260421123www.west.cn/js2016/lib/jquery.Super... https://www.west.cn/js2016/lib/jquery.SuperSlide/superslider.css?t=20260421123 — 200 — 1.2 KiB — 704 ms — http/1.1https://www.west.cn/css2016/index.css?t=2023082120260421123www.west.cn/css2016/index.css?t=202... https://www.west.cn/css2016/index.css?t=2023082120260421123 — 200 — 9.3 KiB — 705 ms — http/1.1https://www.west.cn/js2016/lib/jquery/jquery-1.11.3.min.jswww.west.cn/js2016/lib/jquery/jquer... https://www.west.cn/js2016/lib/jquery/jquery-1.11.3.min.js — 200 — 33.3 KiB — 959 ms — http/1.1https://www.west.cn/css2016/Global.css?t=20260421123www.west.cn/css2016/Global.css?t=20... https://www.west.cn/css2016/Global.css?t=20260421123 — 200 — 11.6 KiB — 765 ms — http/1.1https://www.west.cn/js2016/lib/jsencrypt.min.jswww.west.cn/js2016/lib/jsencrypt.mi... https://www.west.cn/js2016/lib/jsencrypt.min.js — 200 — 18.8 KiB — 939 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/libao1000.jpg?123www.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/libao1000.jpg?123 — 200 — 12.7 KiB — 333 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/domain-sale244x123.gif?2023www.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/domain-sale244x123.gif?2023 — 200 — 10.3 KiB — 342 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/host-sale244x123.gifwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/host-sale244x123.gif — 200 — 29.8 KiB — 409 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/reg-cloudhost244x123.gifwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/reg-cloudhost244x123.gif — 200 — 20.8 KiB — 379 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/com244x123.gifwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/com244x123.gif — 200 — 14.3 KiB — 397 ms — http/1.1https://www.west.cn/js2016/lib/edge/edge.6.0.0.min.jswww.west.cn/js2016/lib/edge/edge.6.... https://www.west.cn/js2016/lib/edge/edge.6.0.0.min.js — 200 — 40.3 KiB — 632 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=AW-1045757556www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-1045757556 — 200 — 166.3 KiB — 185 ms — h2https://www.west.cn/images2016/logo.jpgwww.west.cn/images2016/logo.jpg https://www.west.cn/images2016/logo.jpg — 200 — 12.1 KiB — 358 ms — http/1.1https://www.west.cn/images2016/icon.pngwww.west.cn/images2016/icon.png https://www.west.cn/images2016/icon.png — 200 — 18.6 KiB — 476 ms — http/1.1https://www.west.cn/images2016/index/cloudhostleft1.jpgwww.west.cn/images2016/index/cloudh... https://www.west.cn/images2016/index/cloudhostleft1.jpg — 200 — 12.2 KiB — 558 ms — http/1.1https://www.west.cn/newimages/banner/index_main/2026/tehui.jpg?123www.west.cn/newimages/banner/index_... https://www.west.cn/newimages/banner/index_main/2026/tehui.jpg?123 — 200 — 174.3 KiB — 1.1 s — http/1.1https://www.west.cn/js2016/lib/jquery.SuperSlide/images/loading.gifwww.west.cn/js2016/lib/jquery.Super... https://www.west.cn/js2016/lib/jquery.SuperSlide/images/loading.gif — 200 — 12.4 KiB — 601 ms — http/1.1https://www.west.cn/images2016/index/index-125yuan.jpgwww.west.cn/images2016/index/index-... https://www.west.cn/images2016/index/index-125yuan.jpg — 200 — 33.2 KiB — 671 ms — http/1.1https://www.west.cn/images2016/index/index-icon.pngwww.west.cn/images2016/index/index-... https://www.west.cn/images2016/index/index-icon.png — 200 — 12.2 KiB — 705 ms — http/1.1https://www.west.cn/images2016/index/cloudhostbgicon.pngwww.west.cn/images2016/index/cloudh... https://www.west.cn/images2016/index/cloudhostbgicon.png — 200 — 3.1 KiB — 803 ms — http/1.1https://www.west.cn/images2016/index/index-icon.png?v2www.west.cn/images2016/index/index-... https://www.west.cn/images2016/index/index-icon.png?v2 — 200 — 12.2 KiB — 872 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/new.pngwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/new.png — 200 — 611 B — 887 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/hot.pngwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/hot.png — 200 — 613 B — 966 ms — http/1.1https://www.west.cn/images2016/index/gift.pngwww.west.cn/images2016/index/gift.p... https://www.west.cn/images2016/index/gift.png — 200 — 1.4 KiB — 998 ms — http/1.1https://www.west.cn/js2016/lib/jquery.SuperSlide/jquery.SuperSlide.2.1.1.x.jswww.west.cn/js2016/lib/jquery.Super... https://www.west.cn/js2016/lib/jquery.SuperSlide/jquery.SuperSlide.2.1.1.x.js — 200 — 3.8 KiB — 585 ms — http/1.1https://www.west.cn/js2016/root/jqinclude.js?t=20260421123awww.west.cn/js2016/root/jqinclude.j... https://www.west.cn/js2016/root/jqinclude.js?t=20260421123a — 200 — 728 B — 285 ms — http/1.1
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 3.0 s LCP 4.3 shttps://west.cn// https://west.cn/ — 301 — 79 B — 818 ms — h2https://www.west.cn/www.west.cn/ https://www.west.cn/ — 200 — 51.0 KiB — 1.2 s — http/1.1https://www.west.cn/css2016/global.css?t=202604211230726www.west.cn/css2016/global.css?t=20... https://www.west.cn/css2016/global.css?t=202604211230726 — 200 — 11.6 KiB — 569 ms — http/1.1https://www.west.cn/css2016/common.css?t=20260421123www.west.cn/css2016/common.css?t=20... https://www.west.cn/css2016/common.css?t=20260421123 — 200 — 2.4 KiB — 682 ms — http/1.1https://www.west.cn/js2016/lib/jquery.SuperSlide/superslider.css?t=20260421123www.west.cn/js2016/lib/jquery.Super... https://www.west.cn/js2016/lib/jquery.SuperSlide/superslider.css?t=20260421123 — 200 — 1.2 KiB — 704 ms — http/1.1https://www.west.cn/css2016/index.css?t=2023082120260421123www.west.cn/css2016/index.css?t=202... https://www.west.cn/css2016/index.css?t=2023082120260421123 — 200 — 9.3 KiB — 705 ms — http/1.1https://www.west.cn/js2016/lib/jquery/jquery-1.11.3.min.jswww.west.cn/js2016/lib/jquery/jquer... https://www.west.cn/js2016/lib/jquery/jquery-1.11.3.min.js — 200 — 33.3 KiB — 959 ms — http/1.1https://www.west.cn/css2016/Global.css?t=20260421123www.west.cn/css2016/Global.css?t=20... https://www.west.cn/css2016/Global.css?t=20260421123 — 200 — 11.6 KiB — 765 ms — http/1.1https://www.west.cn/js2016/lib/jsencrypt.min.jswww.west.cn/js2016/lib/jsencrypt.mi... https://www.west.cn/js2016/lib/jsencrypt.min.js — 200 — 18.8 KiB — 939 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/libao1000.jpg?123www.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/libao1000.jpg?123 — 200 — 12.7 KiB — 333 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/domain-sale244x123.gif?2023www.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/domain-sale244x123.gif?2023 — 200 — 10.3 KiB — 342 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/host-sale244x123.gifwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/host-sale244x123.gif — 200 — 29.8 KiB — 409 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/reg-cloudhost244x123.gifwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/reg-cloudhost244x123.gif — 200 — 20.8 KiB — 379 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/com244x123.gifwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/com244x123.gif — 200 — 14.3 KiB — 397 ms — http/1.1https://www.west.cn/js2016/lib/edge/edge.6.0.0.min.jswww.west.cn/js2016/lib/edge/edge.6.... https://www.west.cn/js2016/lib/edge/edge.6.0.0.min.js — 200 — 40.3 KiB — 632 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=AW-1045757556www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-1045757556 — 200 — 166.3 KiB 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361 ms — http/1.1https://www.west.cn/images2016/index/siteFlow-icon.pngwww.west.cn/images2016/index/siteFl... https://www.west.cn/images2016/index/siteFlow-icon.png — 200 — 5.9 KiB — 330 ms — http/1.1https://www.west.cn/images2016/index/siteFlow-icon.png?123www.west.cn/images2016/index/siteFl... https://www.west.cn/images2016/index/siteFlow-icon.png?123 — 200 — 5.9 KiB — 310 ms — http/1.1https://www.west.cn/images2016/advantage.jpgwww.west.cn/images2016/advantage.jp... https://www.west.cn/images2016/advantage.jpg — 200 — 52.1 KiB — 387 ms — http/1.1https://www.west.cn/images2016/bg_agent.jpgwww.west.cn/images2016/bg_agent.jpg https://www.west.cn/images2016/bg_agent.jpg — 200 — 29.6 KiB — 365 ms — http/1.1https://www.west.cn/images2016/bg_footer.pngwww.west.cn/images2016/bg_footer.pn... https://www.west.cn/images2016/bg_footer.png — 200 — 1.9 KiB — 297 ms — http/1.1https://www.west.cn/images2016/footer-icon.pngwww.west.cn/images2016/footer-icon.... 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https://www.west.cn/jscripts/captcha.js?v=202620260421123 — 200 — 4.7 KiB — 280 ms — http/1.1https://www.west.cn/images2016/banner/index_menu/libao1000.jpgwww.west.cn/images2016/banner/index... https://www.west.cn/images2016/banner/index_menu/libao1000.jpg — 200 — 12.7 KiB — 306 ms — http/1.1https://www.west.cn/newimages/login/default.jpgwww.west.cn/newimages/login/default... https://www.west.cn/newimages/login/default.jpg — 200 — 11.9 KiB — 348 ms — http/1.1https://www.west.cn/js2016/component/coupon.js?_t=20260316www.west.cn/js2016/component/coupon... https://www.west.cn/js2016/component/coupon.js?_t=20260316 — 200 — 2.4 KiB — 285 ms — http/1.1https://www.west.cn/js2016/index/index_ani_ouradvan_edge.jswww.west.cn/js2016/index/index_ani_... https://www.west.cn/js2016/index/index_ani_ouradvan_edge.js — 200 — 0 B — 2 ms — http/1.1https://www.west.cn/images2016/index_animation/bj.jpgwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/bj.jpg — 200 — 12.5 KiB — 313 ms — http/1.1https://www.west.cn/images2016/index_animation/tb_02.pngwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/tb_02.png — 200 — 4.3 KiB — 298 ms — http/1.1https://www.west.cn/images2016/index_animation/jb.pngwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/jb.png — 200 — 82.1 KiB — 469 ms — http/1.1https://www.west.cn/images2016/index_animation/bj_yun_11.pngwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/bj_yun_11.png — 200 — 849 B — 283 ms — http/1.1https://www.west.cn/images2016/index_animation/bj_yun_07.pngwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/bj_yun_07.png — 200 — 729 B — 288 ms — http/1.1https://www.west.cn/images2016/index_animation/bj_yun_03.pngwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/bj_yun_03.png — 200 — 939 B — 287 ms — 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http/1.1https://www.west.cn/images2016/index_animation/huojkian_02.pngwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/huojkian_02.png — 200 — 5.7 KiB — 301 ms — http/1.1https://www.west.cn/images2016/index_animation/fuwuqi_03.pngwww.west.cn/images2016/index_animat... https://www.west.cn/images2016/index_animation/fuwuqi_03.png — 200 — 2.7 KiB — 291 ms — http/1.1https://www.west.cn/js2016/lib/require/text.js?_t=20260316www.west.cn/js2016/lib/require/text... https://www.west.cn/js2016/lib/require/text.js?_t=20260316 — 200 — 6.0 KiB — 301 ms — http/1.1https://www.west.cn/jscripts/kf/login.js?_t=20260316www.west.cn/jscripts/kf/login.js?_t... https://www.west.cn/jscripts/kf/login.js?_t=20260316 — 200 — 3.6 KiB — 290 ms — http/1.1https://www.west.cn/js2016/lib/wjf/js/wjf-2.0.0.js?_t=20260316www.west.cn/js2016/lib/wjf/js/wjf-2... https://www.west.cn/js2016/lib/wjf/js/wjf-2.0.0.js?_t=20260316 — 200 — 21.6 KiB — 422 ms — http/1.1https://www.west.cn/config/getCoupon.asp?_t=20260316www.west.cn/config/getCoupon.asp?_t... https://www.west.cn/config/getCoupon.asp?_t=20260316 — 200 — 970 B — 401 ms — http/1.1https://www.west.cn/tongji/img.asp?a=19db7143385fd1-03f97e1183c7998-18525631-75300-19db714338615f9&b=&c=https%3A//www.west.cn/&d=en-US&e=800x600&f=148858&g=0&h=&i=&j=&l=0&m=b88de2d2&rnd=1294512167&g1=A-1&g2=A-1-1www.west.cn/tongji/img.asp?a=19db71... https://www.west.cn/tongji/img.asp?a=19db7143385fd1-03f97e1183c7998-18525631-75300-19db714338615f9&b=&c=https%3A//www.west.cn/&d=en-US&e=800x600&f=148858&g=0&h=&i=&j=&l=0&m=b88de2d2&rnd=1294512167&g1=A-1&g2=A-1-1 — 200 — 14 B — 306 ms — http/1.1https://www.west.cn/favicon.icowww.west.cn/favicon.ico https://www.west.cn/favicon.ico — 200 — 1.4 KiB — 294 ms — 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https://hm.baidu.com/hm.gif?cc=0&ck=1&cl=24-bit&ds=800x600&ep=%7B%22netAll%22%3A1221%2C%22netDns%22%3A1%2C%22netTcp%22%3A399%2C%22srv%22%3A545%2C%22dom%22%3A3977%2C%22loadEvent%22%3A10429%2C%22qid%22%3A%22%22%2C%22bdDom%22%3A0%2C%22bdRun%22%3A0%2C%22bdDef%22%3A0%7D&et=87&ja=0&ln=en-US&lo=0&nv=1&rnd=261833412&si=d0e33fc3fbfc66c95d9fdcc4c93a8288&st=1&v=1.1.11&lv=1&tt=%E8%A5%BF%E9%83%A8%E6%95%B0%E7%A0%81%E5%AE%98%E7%BD%91-%E4%BA%91%E6%9C%8D%E5%8A%A1%E5%99%A8-%E8%99%9A%E6%8B%9F%E4%B8%BB%E6%9C%BA-%E5%9F%9F%E5%90%8D%E6%B3%A8%E5%86%8C%2C24%E5%B9%B4%E7%9F%A5%E5%90%8D%E4%BA%91%E6%9C%8D%E5%8A%A1%E5%95%86%EF%BC%81 — 200 — 636 B — 283 ms — http/1.1https://www.west.cn/newimages/banner/index_main/2026/app-1920x479.jpgwww.west.cn/newimages/banner/index_... https://www.west.cn/newimages/banner/index_main/2026/app-1920x479.jpg — 200 — 116.3 KiB — 827 ms — http/1.1
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 1465ms · 291KB · ¥72/mo
www.west.cn
Other
Costly
Execution 587ms
Transfer 40 KB
Monthly Cost ¥29/mo
www.west.cn
Other
Costly
Execution 365ms
Transfer 51 KB
Monthly Cost ¥18/mo
www.west.cn
Other
Costly
Execution 270ms
Transfer 33 KB
Monthly Cost ¥13/mo
Unattributable
Other
Optional
Execution 179ms
Transfer 0 KB
Monthly Cost ¥9/mo
Google Tag Manager
Tag Manager
Optional
Execution 64ms
Transfer 166 KB
Unused 38%
Monthly Cost ¥3/mo

These scripts may cost more than they're worth

  • www.west.cn adds 587ms and costs ~¥29/month
  • www.west.cn adds 365ms and costs ~¥18/month
  • www.west.cn adds 270ms 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.west.cn takes 587ms 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

www.west.cn takes 365ms 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

www.west.cn takes 270ms 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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