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https://sh.gov.cn

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
48
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
73
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
82
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.

4.43 s

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

7.73 s

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

402 ms

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

0.024

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

13.01 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.

25.99 s

Page Load Progression

1.1 s
2.2 s
3.3 s
4.4 s
5.4 s
6.5 s
7.6 s
8.7 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
5.5 MB transferred, 97 requests
FIX
5.5 MB transferred, 97 requests
Critical::
Page weighs 6.0 MB (5.5 MB transferred)
Warning::
Images are 4.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.1 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
97 HTTP requests
Info::
Estimated 1.2 g CO2 per page load
5.5 MB / 2.4 MB budget
5.5 MB transferred
97 requests
1.2 g CO2 per page load
Images 4.1 MiB 73%
JavaScript 1.3 MiB 24%
CSS 66.6 KiB 1%
Fonts 44.2 KiB 1%
Other 18.4 KiB 0%
HTML 17.7 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

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 (5.5 MiB of 5.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3346ms total JS execution
FIX
3346ms total JS execution
Warning::
https://www.shanghai.gov.cn/: 1444ms CPU time
Warning::
Unattributable: 707ms CPU time
Warning::
https://www.shanghai.gov.cn/assets2020/js/footer.j...: 330ms CPU time
Warning::
https://www.shanghai.gov.cn/assets2020/js/ETUI/jqu...: 327ms CPU time
Info::
https://wza.shanghai.gov.cn/a11y/schubert.js: 188ms CPU time
Warning::
Third-party scripts: 3346ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Other 31% Style & Layout 15% Rendering 7% Script Parsing & Compilation 6% Parse HTML & CSS 6%
ScriptTotalScriptingParse/CompileParty
https://www.shanghai.gov.cn/1444ms275ms7ms3rd
Unattributable707ms10ms0ms3rd
https://www.shanghai.gov.cn/assets2020/js/footer.js330ms239ms8ms3rd
https://www.shanghai.gov.cn/assets2020/js/ETUI/jquery.min.1.12.4.js327ms263ms12ms3rd
https://wza.shanghai.gov.cn/a11y/schubert.js188ms165ms2ms3rd
https://wza.shanghai.gov.cn/a11y/modules/pinyin.js?v=2.6.8.1187ms105ms81ms3rd
https://www.shanghai.gov.cn/assets2020/js/ETUI/ETUI3.min.js88ms42ms11ms3rd
https://stat.shanghai.gov.cn/stat/traffic_v2.js74ms63ms9ms3rd
D
JS Bundles
Action
31 scripts, 288 KB unused
FIX
31 scripts, 288 KB unused
Warning::
https://wza.shanghai.gov.cn/a11y/modules/darkreade...: 70 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.shanghai.gov.cn/assets2020/js/ETUI/ETU...: 53 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.shanghai.gov.cn/assets2020/js/ETUI/ETU...: unminified — 29 KB could be saved
Warning::
https://wza.shanghai.gov.cn/a11y/modules/jquery.js...: 42 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://wza.shanghai.gov.cn/a11y/modules/trout.js?...: 37 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.shanghai.gov.cn/assets2020/js/ETUI/jqu...: 31 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 288 KB
288 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://wza.shanghai.gov.cn/a11y/modules/darkreader.js?v=2.6.8.184 KB70 KB (83%)✓3rd
https://www.shanghai.gov.cn/assets2020/js/ETUI/ETUI3.min.js71 KB53 KB (75%)✗3rd
https://wza.shanghai.gov.cn/a11y/modules/jquery.js?v=2.6.8.183 KB42 KB (50%)✓3rd
https://wza.shanghai.gov.cn/a11y/modules/trout.js?v=2.6.8.167 KB37 KB (56%)✓3rd
https://www.shanghai.gov.cn/assets2020/js/ETUI/jquery.min.1.12.4.js88 KB31 KB (35%)✓3rd
https://wza.shanghai.gov.cn/a11y/modules/splayer.js?v=2.6.8.159 KB30 KB (50%)✓3rd
https://voice.shanghai.gov.cn/js/gov_msc.js35 KB27 KB (78%)✗3rd
https://wza.shanghai.gov.cn/a11y/schubert.js14 KB—✓3rd
https://jhelper.shanghai.gov.cn/wzagjt/a11y/access.js1 KB—✓3rd
https://jhelper.shanghai.gov.cn/publicJS/3100000044.js6 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

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

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

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

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

D
Page Weight Inventory
Action
97 resources · 5.5 MB · 288 KB savings available
FIX
97 resources · 5.5 MB · 288 KB savings available
Warning::
Page weight 4.5 MB over 1MB target
Got: 5.5 MB Expected: ≤ 1 MB
Info::
~288 KB of savings available
Warning::
96 third-party resources (100% of weight)
Info::
5 resources over 200KB
97 resources · 5.5 MiB · 96 third-party 4.5 MiB over 1MB target
Image 74% · 4.1 MiB
JavaScript 24% · 1.3 MiB
CSS 1% · 66.6 KiB
Font 1% · 44.2 KiB
Document 0% · 18.3 KiB
Other 0% · 0 B

~288.3 KiB of savings available

Remove unused JavaScript: 288.3 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
52 images, 0 KB saveable
REVIEW
52 images, 0 KB saveable
Warning::
https://www.shanghai.gov.cn/assets2020/img/ico3.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/logo-bi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/icon1.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/icon4.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/newshanghai2018/assets... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/wzabst.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/newshanghai/img/ga.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/ico2.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/exposure/jiucuo.png?v=... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/icon2.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/logo102... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.shanghai.gov.cn/assets2020/img/icon3.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
52 images 4.1 MB
0 oversized -0 KB
51 legacy format
12 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

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
1 fonts (44 KB)
PASS
1 fonts (44 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

44 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 4.4 s LCP 7.7 shttps://www.shanghai.gov.cn/assets2020/css/iconfont.woff2?t=1721024830100iconfont.woff2 https://www.shanghai.gov.cn/assets2020/css/iconfont.woff2?t=1721024830100 — 44.2 KiB — 712 ms — font-display: swap
iconfont.woff2 woff2 swap
Size 44 KB
Load time 712 ms
Start 4.7 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
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+
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
97 requests over 12768ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.4 s LCP 7.7 shttps://sh.gov.cn// https://sh.gov.cn/ — 301 — 530 B — 727 ms — http/1.1http://www.shanghai.gov.cn/www.shanghai.gov.cn/ http://www.shanghai.gov.cn/ — 307 — 0 B — 3 ms — http/1.1https://www.shanghai.gov.cn/www.shanghai.gov.cn/ https://www.shanghai.gov.cn/ — 200 — 17.7 KiB — 2.0 s — http/1.1https://www.shanghai.gov.cn/assets2020/css/ETUI/ETUI3.min.csswww.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/ETUI/ETUI3.min.css — 200 — 20.6 KiB — 466 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/infinitypush/jquery.ma.infinitypush.csswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/infinitypush/jquery.ma.infinitypush.css — 200 — 1.4 KiB — 671 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/owl/owl.carousel.csswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/owl/owl.carousel.css — 200 — 2.4 KiB — 673 ms — http/1.1https://www.shanghai.gov.cn/assets2020/css/style2020.csswww.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/style2020.css — 200 — 22.0 KiB — 994 ms — http/1.1https://www.shanghai.gov.cn/assets2020/css/style2020-medio.csswww.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/style2020-medio.css — 200 — 11.0 KiB — 718 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/share/share.min.csswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/share/share.min.css — 200 — 1.6 KiB — 693 ms — http/1.1https://www.shanghai.gov.cn/assets2020/js/ETUI/jquery.min.1.12.4.jswww.shanghai.gov.cn/assets2020/js/E... https://www.shanghai.gov.cn/assets2020/js/ETUI/jquery.min.1.12.4.js — 200 — 88.0 KiB — 1.9 s — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/infinitypush/jquery.ma.infinitypush.jswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/infinitypush/jquery.ma.infinitypush.js — 200 — 15.9 KiB — 1.1 s — http/1.1https://www.shanghai.gov.cn/assets2020/img/logo1020.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/logo1020.png — 200 — 14.2 KiB — 445 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/logo-big.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/logo-big.png — 200 — 811.7 KiB — 5.2 s — http/1.1https://www.shanghai.gov.cn/assets2020/css/iconfont.csswww.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/iconfont.css — 200 — 2.8 KiB — 241 ms — http/1.1https://www.shanghai.gov.cn/voice/css/custom.csswww.shanghai.gov.cn/voice/css/custo... https://www.shanghai.gov.cn/voice/css/custom.css — 200 — 2.5 KiB — 232 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/icon1.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/icon1.png — 200 — 23.1 KiB — 446 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/man1.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/man1.png — 200 — 3.7 KiB — 228 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/man2.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/man2.png — 200 — 3.6 KiB — 238 ms — http/1.1https://www.shanghai.gov.cn/assets2020/js/footer.jswww.shanghai.gov.cn/assets2020/js/f... https://www.shanghai.gov.cn/assets2020/js/footer.js — 200 — 58.1 KiB — 907 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/owl/owl.carousel.min.jswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/owl/owl.carousel.min.js — 200 — 43.9 KiB — 671 ms — http/1.1https://www.shanghai.gov.cn/assets2020/js/main.jswww.shanghai.gov.cn/assets2020/js/m... https://www.shanghai.gov.cn/assets2020/js/main.js — 200 — 1.5 KiB — 249 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/iphone.jpgwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/iphone.jpg — 200 — 164.0 KiB — 2.1 s — http/1.1https://www.shanghai.gov.cn/assets2020/img/icon2.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/icon2.png — 200 — 22.5 KiB — 665 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/caret.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/caret.png — 200 — 1.6 KiB — 852 ms — http/1.1https://www.shanghai.gov.cn/voice/img/icon-voice-microphone.pngwww.shanghai.gov.cn/voice/img/icon-... https://www.shanghai.gov.cn/voice/img/icon-voice-microphone.png — 200 — 7.2 KiB — 904 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/icon3.pngwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/icon3.png — 200 — 23.0 KiB — 1.2 s — http/1.1https://www.shanghai.gov.cn/assets2020/css/iconfont.woff2?t=1721024830100www.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/iconfont.woff2?t=1721024830100 — 200 — 44.2 KiB — 712 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/share/jquery.share.min.jswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/share/jquery.share.min.js — 200 — 45.5 KiB — 724 ms — http/1.1https://www.shanghai.gov.cn/assets2020/js/ywlogin.jswww.shanghai.gov.cn/assets2020/js/y... https://www.shanghai.gov.cn/assets2020/js/ywlogin.js — 200 — 10.4 KiB — 243 ms — http/1.1https://www.shanghai.gov.cn/assets2020/js/ETUI/ETUI3.min.jswww.shanghai.gov.cn/assets2020/js/E... https://www.shanghai.gov.cn/assets2020/js/ETUI/ETUI3.min.js — 200 — 71.3 KiB — 1.1 s — http/1.1
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.4 s LCP 7.7 shttps://sh.gov.cn// https://sh.gov.cn/ — 301 — 530 B — 727 ms — http/1.1http://www.shanghai.gov.cn/www.shanghai.gov.cn/ http://www.shanghai.gov.cn/ — 307 — 0 B — 3 ms — http/1.1https://www.shanghai.gov.cn/www.shanghai.gov.cn/ https://www.shanghai.gov.cn/ — 200 — 17.7 KiB — 2.0 s — http/1.1https://www.shanghai.gov.cn/assets2020/css/ETUI/ETUI3.min.csswww.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/ETUI/ETUI3.min.css — 200 — 20.6 KiB — 466 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/infinitypush/jquery.ma.infinitypush.csswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/infinitypush/jquery.ma.infinitypush.css — 200 — 1.4 KiB — 671 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/owl/owl.carousel.csswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/owl/owl.carousel.css — 200 — 2.4 KiB — 673 ms — http/1.1https://www.shanghai.gov.cn/assets2020/css/style2020.csswww.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/style2020.css — 200 — 22.0 KiB — 994 ms — http/1.1https://www.shanghai.gov.cn/assets2020/css/style2020-medio.csswww.shanghai.gov.cn/assets2020/css/... https://www.shanghai.gov.cn/assets2020/css/style2020-medio.css — 200 — 11.0 KiB — 718 ms — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/share/share.min.csswww.shanghai.gov.cn/assets2020/plug... https://www.shanghai.gov.cn/assets2020/plugin/share/share.min.css — 200 — 1.6 KiB — 693 ms — http/1.1https://www.shanghai.gov.cn/assets2020/js/ETUI/jquery.min.1.12.4.jswww.shanghai.gov.cn/assets2020/js/E... https://www.shanghai.gov.cn/assets2020/js/ETUI/jquery.min.1.12.4.js — 200 — 88.0 KiB — 1.9 s — http/1.1https://www.shanghai.gov.cn/assets2020/plugin/infinitypush/jquery.ma.infinitypush.jswww.shanghai.gov.cn/assets2020/plug... 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https://www.shanghai.gov.cn/assets2020/img/ico3.png — 200 — 3.8 KiB — 244 ms — http/1.1https://www.shanghai.gov.cn/assets2020/img/footer.jpgwww.shanghai.gov.cn/assets2020/img/... https://www.shanghai.gov.cn/assets2020/img/footer.jpg — 200 — 70.4 KiB — 472 ms — http/1.1https://www.shanghai.gov.cn/exposure/jiucuo.png?v=3100000044www.shanghai.gov.cn/exposure/jiucuo... https://www.shanghai.gov.cn/exposure/jiucuo.png?v=3100000044 — 200 — 4.5 KiB — 224 ms — http/1.1https://wza.shanghai.gov.cn/a11y/modules/big5.js?v=2.6.8.1wza.shanghai.gov.cn/a11y/modules/bi... https://wza.shanghai.gov.cn/a11y/modules/big5.js?v=2.6.8.1 — 200 — 45.2 KiB — 225 ms — http/1.1https://wza.shanghai.gov.cn/a11y/modules/trout.js?v=2.6.8.1wza.shanghai.gov.cn/a11y/modules/tr... https://wza.shanghai.gov.cn/a11y/modules/trout.js?v=2.6.8.1 — 200 — 67.4 KiB — 227 ms — http/1.1https://wza.shanghai.gov.cn/a11y/modules/splayer.js?v=2.6.8.1wza.shanghai.gov.cn/a11y/modules/sp... https://wza.shanghai.gov.cn/a11y/modules/splayer.js?v=2.6.8.1 — 200 — 59.3 KiB — 240 ms — http/1.1https://wza.shanghai.gov.cn/a11y/css/default/trout.csswza.shanghai.gov.cn/a11y/css/defaul... https://wza.shanghai.gov.cn/a11y/css/default/trout.css — 200 — 2.2 KiB — 469 ms — http/1.1https://wza.shanghai.gov.cn/a11y/modules/darkreader.js?v=2.6.8.1wza.shanghai.gov.cn/a11y/modules/da... https://wza.shanghai.gov.cn/a11y/modules/darkreader.js?v=2.6.8.1 — 200 — 84.4 KiB — 850 ms — http/1.1https://www.shanghai.gov.cn/newshanghai/2018project/ywtb/assets/img/ico/favicon.pngwww.shanghai.gov.cn/newshanghai/201... https://www.shanghai.gov.cn/newshanghai/2018project/ywtb/assets/img/ico/favicon.png — 200 — 17.9 KiB — 234 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 3346ms · 836KB · ¥165/mo
www.shanghai.gov.cn
Other
Costly
Execution 1444ms
Transfer 18 KB
Monthly Cost ¥71/mo
Unattributable
Other
Costly
Execution 707ms
Transfer 0 KB
Monthly Cost ¥35/mo
www.shanghai.gov.cn
Other
Costly
Execution 330ms
Transfer 58 KB
Monthly Cost ¥16/mo
www.shanghai.gov.cn
Other
Costly
Execution 327ms
Transfer 88 KB
Unused 35%
Monthly Cost ¥16/mo
wza.shanghai.gov.cn
Other
Optional
Execution 188ms
Transfer 14 KB
Monthly Cost ¥9/mo
wza.shanghai.gov.cn
Other
Optional
Execution 187ms
Transfer 560 KB
Monthly Cost ¥9/mo
www.shanghai.gov.cn
Other
Optional
Execution 88ms
Transfer 71 KB
Unused 75%
Monthly Cost ¥4/mo
stat.shanghai.gov.cn
Other
Optional
Execution 74ms
Transfer 27 KB
Monthly Cost ¥4/mo

These scripts may cost more than they're worth

  • www.shanghai.gov.cn adds 1444ms and costs ~¥71/month
  • Unattributable adds 707ms and costs ~¥35/month
  • www.shanghai.gov.cn adds 330ms and costs ~¥16/month
  • www.shanghai.gov.cn adds 327ms and costs ~¥16/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.shanghai.gov.cn takes 1444ms 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 707ms 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.shanghai.gov.cn takes 330ms 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.shanghai.gov.cn takes 327ms 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

75% of www.shanghai.gov.cn's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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