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https://youth.cn

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
69
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
48
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
54
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
75
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.

3.82 s

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

5.68 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.

0.000

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

4.76 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.

5.69 s

Page Load Progression

867 ms
1.7 s
2.6 s
3.5 s
4.3 s
5.2 s
6.1 s
6.9 s
Checks
17
8 PASS 4 REVIEW 3 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 (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
42 resources · 1.6 MB · 0 KB savings available
FIX
42 resources · 1.6 MB · 0 KB savings available
Warning::
Page weight 581 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Warning::
41 third-party resources (100% of weight)
Info::
2 resources over 200KB
42 resources · 1.6 MiB · 41 third-party 581.4 KiB over 1MB target
Image 93% · 1.5 MiB
JavaScript 6% · 94.2 KiB
CSS 1% · 10.3 KiB
Document 0% · 7.9 KiB
Font 0% · 2.7 KiB
Other 0% · 0 B
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
Page Weight Budget
Action
1.6 MB transferred, 42 requests
REVIEW
1.6 MB transferred, 42 requests
Info::
Page weighs 1.8 MB (1.6 MB transferred)
Warning::
Images are 1.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.5 MB
Info::
42 HTTP requests
Info::
Estimated 0.33 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
42 requests
0.33 g CO2 per page load
Images 1.5 MiB 93%
JavaScript 94.2 KiB 6%
CSS 10.3 KiB 1%
HTML 7.2 KiB 0%
Fonts 2.7 KiB 0%
Other 748 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

B
Image Optimization
23 images, 0 KB saveable
REVIEW
23 images, 0 KB saveable
Warning::
https://m.youth.cn/images/20181121myouth_logo.png?... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
23 images 1.5 MB
0 oversized -0 KB
23 legacy format
1 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

B
JS Execution Cost
863ms total JS execution
REVIEW
863ms total JS execution
Warning::
https://m.youth.cn/: 421ms CPU time
Warning::
Unattributable: 287ms CPU time
Info::
https://news.youth.cn/images/jquery-1.9.1.min.js: 78ms CPU time
Info::
https://hm.baidu.com/hm.js?969516094b342230ceaf065...: 77ms CPU time
Warning::
Third-party scripts: 863ms (100% of total)

Main Thread Breakdown

Other 40% Style & Layout 25% Script Evaluation 22% Rendering 8% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://m.youth.cn/421ms32ms6ms3rd
Unattributable287ms6ms0ms3rd
https://news.youth.cn/images/jquery-1.9.1.min.js78ms57ms7ms3rd
https://hm.baidu.com/hm.js?969516094b342230ceaf065c844d82f377ms69ms2ms3rd
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 (3 KB)
PASS
1 fonts (3 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

3 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 FCP 3.8 s LCP 5.7 sdata:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAArMAAsAAAAAELgAAQAAAAAAAAAAAAAAAAAAA…x-font-woff;charset=utf... data:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAArMAAsAAAAAELgAAQAAAAAAAAAAAAAAAAAAA… — 2.7 KiB — 31 ms — font-display: swap
x-font-woff;charset=utf... woff swap
Size 3 KB
Load time 31 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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)

Fixing the unchecked items could save ~1 KB and ~2 ms

A+
JS Bundles
11 scripts, 0 KB unused
PASS
11 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://news.youth.cn/images/jquery-1.9.1.min.js33 KB—✓3rd
https://m.youth.cn/images/20170524zepto.js10 KB—✓3rd
https://m.youth.cn/images/20170601mobile_common.js2 KB—✓3rd
https://m.youth.cn/images/swiper.min.js20 KB—✓3rd
https://m.youth.cn/images/swiper_index.js1 KB—✓3rd
https://m.youth.cn/images/youthVideo-min.1.0.js?201903032 KB—✓3rd
https://zz.bdstatic.com/linksubmit/push.js1 KB—✓3rd
https://m.youth.cn/qwtx/xxl/20181215qwtx_index_23476.js?405208444298 KB—✓3rd
https://hm.baidu.com/hm.js?969516094b342230ceaf065c844d82f312 KB—✓3rd
https://cl5.webterren.com/webdig.js?z=361 KB—✓3rd
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
42 requests over 5157ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.8 s LCP 5.7 shttps://youth.cn// https://youth.cn/ — 301 — 402 B — 95 ms — http/1.1https://www.youth.cn/www.youth.cn/ https://www.youth.cn/ — 301 — 346 B — 91 ms — http/1.1https://m.youth.cn/m.youth.cn/ https://m.youth.cn/ — 200 — 7.2 KiB — 973 ms — http/1.1https://m.youth.cn/images/20181121mobile_page.cssm.youth.cn/images/20181121mobile_pa... https://m.youth.cn/images/20181121mobile_page.css — 200 — 2.9 KiB — 32 ms — http/1.1https://m.youth.cn/images/swiper.min.cssm.youth.cn/images/swiper.min.css https://m.youth.cn/images/swiper.min.css — 200 — 3.6 KiB — 64 ms — http/1.1https://t.m.youth.cn/static/youth_iconfont/iconfont.csst.m.youth.cn/static/youth_iconfont/... https://t.m.youth.cn/static/youth_iconfont/iconfont.css — 200 — 3.8 KiB — 445 ms — http/1.1https://news.youth.cn/images/jquery-1.9.1.min.jsnews.youth.cn/images/jquery-1.9.1.m... https://news.youth.cn/images/jquery-1.9.1.min.js — 200 — 32.7 KiB — 686 ms — http/1.1https://m.youth.cn/images/20170524zepto.jsm.youth.cn/images/20170524zepto.js https://m.youth.cn/images/20170524zepto.js — 200 — 10.2 KiB — 88 ms — http/1.1https://m.youth.cn/images/20170601mobile_common.jsm.youth.cn/images/20170601mobile_co... https://m.youth.cn/images/20170601mobile_common.js — 200 — 1.8 KiB — 87 ms — http/1.1https://m.youth.cn/images/swiper.min.jsm.youth.cn/images/swiper.min.js https://m.youth.cn/images/swiper.min.js — 200 — 19.8 KiB — 88 ms — http/1.1https://m.youth.cn/images/swiper_index.jsm.youth.cn/images/swiper_index.js https://m.youth.cn/images/swiper_index.js — 200 — 851 B — 86 ms — http/1.1https://m.youth.cn/images/20181121myouth_logo.png?fm.youth.cn/images/20181121myouth_lo... https://m.youth.cn/images/20181121myouth_logo.png?f — 200 — 5.4 KiB — 699 ms — http/1.1https://m.youth.cn/qwtx/lbt/202604/W020260422260009555320.jpgm.youth.cn/qwtx/lbt/202604/W0202604... https://m.youth.cn/qwtx/lbt/202604/W020260422260009555320.jpg — 200 — 355.9 KiB — 404 ms — http/1.1https://m.youth.cn/qwtx/lbt/202604/W020260422260766701489.jpgm.youth.cn/qwtx/lbt/202604/W0202604... https://m.youth.cn/qwtx/lbt/202604/W020260422260766701489.jpg — 200 — 353.5 KiB — 402 ms — http/1.1https://m.youth.cn/qwtx/lbt/202604/W020260422261302568252.jpgm.youth.cn/qwtx/lbt/202604/W0202604... https://m.youth.cn/qwtx/lbt/202604/W020260422261302568252.jpg — 200 — 169.2 KiB — 455 ms — http/1.1https://m.youth.cn/images/youthVideo-min.1.0.js?20190303m.youth.cn/images/youthVideo-min.1.... https://m.youth.cn/images/youthVideo-min.1.0.js?20190303 — 200 — 2.4 KiB — 31 ms — http/1.1https://news.youth.cn/images/20170601header_menu.pngnews.youth.cn/images/20170601header... https://news.youth.cn/images/20170601header_menu.png — 200 — 807 B — 32 ms — http/1.1https://news.youth.cn/images/20170601header_logo.pngnews.youth.cn/images/20170601header... https://news.youth.cn/images/20170601header_logo.png — 200 — 4.8 KiB — 64 ms — http/1.1https://zz.bdstatic.com/linksubmit/push.jszz.bdstatic.com/linksubmit/push.js https://zz.bdstatic.com/linksubmit/push.js — 200 — 560 B — 1.2 s — h2data:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAArMAAsAAAAAELgAAQAAAAAAAAAAAAAAAAAAA…data:application/x-font-woff;charse... data:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAArMAAsAAAAAELgAAQAAAAAAAAAAAAAAAAAAA… — 200 — 2.7 KiB — 31 ms — datahttps://m.youth.cn/qwtx/xxl/20181215qwtx_index_23476.js?40520844429m.youth.cn/qwtx/xxl/20181215qwtx_in... https://m.youth.cn/qwtx/xxl/20181215qwtx_index_23476.js?40520844429 — 200 — 8.1 KiB — 474 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422806662738433.jpg?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422806662738433.jpg?resize=w_204,h_128 — 200 — 95.9 KiB — 323 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422807359488210.jpg?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422807359488210.jpg?resize=w_204,h_128 — 200 — 96.4 KiB — 381 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422808990727457.png?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422808990727457.png?resize=w_204,h_128 — 200 — 33.9 KiB — 345 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422798864750004.jpg?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422798864750004.jpg?resize=w_204,h_128 — 200 — 46.3 KiB — 367 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422609129053537.png?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422609129053537.png?resize=w_204,h_128 — 200 — 55.9 KiB — 357 ms — http/1.1https://news.youth.cn/images/huidi_pic_banner.jpgnews.youth.cn/images/huidi_pic_bann... https://news.youth.cn/images/huidi_pic_banner.jpg — 200 — 3.6 KiB — 276 ms — http/1.1https://news.youth.cn/images/huiselogo_pic.jpgnews.youth.cn/images/huiselogo_pic.... https://news.youth.cn/images/huiselogo_pic.jpg — 200 — 2.3 KiB — 35 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422608248359710.png?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422608248359710.png?resize=w_204,h_128 — 200 — 42.8 KiB — 94 ms — http/1.1https://m.youth.cn/images/20181121myouth_rect.pngm.youth.cn/images/20181121myouth_re... https://m.youth.cn/images/20181121myouth_rect.png — 200 — 833 B — 398 ms — http/1.1
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.8 s LCP 5.7 shttps://youth.cn// https://youth.cn/ — 301 — 402 B — 95 ms — http/1.1https://www.youth.cn/www.youth.cn/ https://www.youth.cn/ — 301 — 346 B — 91 ms — http/1.1https://m.youth.cn/m.youth.cn/ https://m.youth.cn/ — 200 — 7.2 KiB — 973 ms — http/1.1https://m.youth.cn/images/20181121mobile_page.cssm.youth.cn/images/20181121mobile_pa... https://m.youth.cn/images/20181121mobile_page.css — 200 — 2.9 KiB — 32 ms — http/1.1https://m.youth.cn/images/swiper.min.cssm.youth.cn/images/swiper.min.css https://m.youth.cn/images/swiper.min.css — 200 — 3.6 KiB — 64 ms — http/1.1https://t.m.youth.cn/static/youth_iconfont/iconfont.csst.m.youth.cn/static/youth_iconfont/... https://t.m.youth.cn/static/youth_iconfont/iconfont.css — 200 — 3.8 KiB — 445 ms — http/1.1https://news.youth.cn/images/jquery-1.9.1.min.jsnews.youth.cn/images/jquery-1.9.1.m... https://news.youth.cn/images/jquery-1.9.1.min.js — 200 — 32.7 KiB — 686 ms — http/1.1https://m.youth.cn/images/20170524zepto.jsm.youth.cn/images/20170524zepto.js https://m.youth.cn/images/20170524zepto.js — 200 — 10.2 KiB — 88 ms — http/1.1https://m.youth.cn/images/20170601mobile_common.jsm.youth.cn/images/20170601mobile_co... https://m.youth.cn/images/20170601mobile_common.js — 200 — 1.8 KiB — 87 ms — http/1.1https://m.youth.cn/images/swiper.min.jsm.youth.cn/images/swiper.min.js https://m.youth.cn/images/swiper.min.js — 200 — 19.8 KiB — 88 ms — http/1.1https://m.youth.cn/images/swiper_index.jsm.youth.cn/images/swiper_index.js https://m.youth.cn/images/swiper_index.js — 200 — 851 B — 86 ms — http/1.1https://m.youth.cn/images/20181121myouth_logo.png?fm.youth.cn/images/20181121myouth_lo... https://m.youth.cn/images/20181121myouth_logo.png?f — 200 — 5.4 KiB — 699 ms — http/1.1https://m.youth.cn/qwtx/lbt/202604/W020260422260009555320.jpgm.youth.cn/qwtx/lbt/202604/W0202604... https://m.youth.cn/qwtx/lbt/202604/W020260422260009555320.jpg — 200 — 355.9 KiB — 404 ms — http/1.1https://m.youth.cn/qwtx/lbt/202604/W020260422260766701489.jpgm.youth.cn/qwtx/lbt/202604/W0202604... https://m.youth.cn/qwtx/lbt/202604/W020260422260766701489.jpg — 200 — 353.5 KiB — 402 ms — http/1.1https://m.youth.cn/qwtx/lbt/202604/W020260422261302568252.jpgm.youth.cn/qwtx/lbt/202604/W0202604... https://m.youth.cn/qwtx/lbt/202604/W020260422261302568252.jpg — 200 — 169.2 KiB — 455 ms — http/1.1https://m.youth.cn/images/youthVideo-min.1.0.js?20190303m.youth.cn/images/youthVideo-min.1.... https://m.youth.cn/images/youthVideo-min.1.0.js?20190303 — 200 — 2.4 KiB — 31 ms — http/1.1https://news.youth.cn/images/20170601header_menu.pngnews.youth.cn/images/20170601header... https://news.youth.cn/images/20170601header_menu.png — 200 — 807 B — 32 ms — http/1.1https://news.youth.cn/images/20170601header_logo.pngnews.youth.cn/images/20170601header... https://news.youth.cn/images/20170601header_logo.png — 200 — 4.8 KiB — 64 ms — http/1.1https://zz.bdstatic.com/linksubmit/push.jszz.bdstatic.com/linksubmit/push.js https://zz.bdstatic.com/linksubmit/push.js — 200 — 560 B — 1.2 s — h2data:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAArMAAsAAAAAELgAAQAAAAAAAAAAAAAAAAAAA…data:application/x-font-woff;charse... data:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAArMAAsAAAAAELgAAQAAAAAAAAAAAAAAAAAAA… — 200 — 2.7 KiB — 31 ms — datahttps://m.youth.cn/qwtx/xxl/20181215qwtx_index_23476.js?40520844429m.youth.cn/qwtx/xxl/20181215qwtx_in... https://m.youth.cn/qwtx/xxl/20181215qwtx_index_23476.js?40520844429 — 200 — 8.1 KiB — 474 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422806662738433.jpg?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422806662738433.jpg?resize=w_204,h_128 — 200 — 95.9 KiB — 323 ms — 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https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422609129053537.png?resize=w_204,h_128 — 200 — 55.9 KiB — 357 ms — http/1.1https://news.youth.cn/images/huidi_pic_banner.jpgnews.youth.cn/images/huidi_pic_bann... https://news.youth.cn/images/huidi_pic_banner.jpg — 200 — 3.6 KiB — 276 ms — http/1.1https://news.youth.cn/images/huiselogo_pic.jpgnews.youth.cn/images/huiselogo_pic.... https://news.youth.cn/images/huiselogo_pic.jpg — 200 — 2.3 KiB — 35 ms — http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422608248359710.png?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422608248359710.png?resize=w_204,h_128 — 200 — 42.8 KiB — 94 ms — http/1.1https://m.youth.cn/images/20181121myouth_rect.pngm.youth.cn/images/20181121myouth_re... https://m.youth.cn/images/20181121myouth_rect.png — 200 — 833 B — 398 ms — 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http/1.1https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422602344387405.png?resize=w_204,h_128t.m.youth.cn/magicimg/m.youth.cn/qw... https://t.m.youth.cn/magicimg/m.youth.cn/qwtx/xxl/202604/W020260422602344387405.png?resize=w_204,h_128 — 200 — 63.9 KiB — 37 ms — http/1.1https://t.m.youth.cn/magicimg/news.youth.cn/qdj/202604/W020260422292360031577.jpg?resize=w_204,h_128t.m.youth.cn/magicimg/news.youth.cn... https://t.m.youth.cn/magicimg/news.youth.cn/qdj/202604/W020260422292360031577.jpg?resize=w_204,h_128 — 200 — 9.2 KiB — 308 ms — http/1.1https://t.m.youth.cn/magicimg/news.youth.cn/qdj/202604/W020260421294615275506.jpg?resize=w_204,h_128t.m.youth.cn/magicimg/news.youth.cn... https://t.m.youth.cn/magicimg/news.youth.cn/qdj/202604/W020260421294615275506.jpg?resize=w_204,h_128 — 200 — 19.6 KiB — 305 ms — http/1.1https://sp0.baidu.com/9_Q4simg2RQJ8t7jm9iCKT-xh_/s.gif?l=https://m.youth.cn/sp0.baidu.com/9_Q4simg2RQJ8t7jm9iCK... 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http/1.1https://cl0.webterren.com/1.gif?z=36&a=19db7289026&b=%u4E2D%u56FD%u9752%u5E74%u7F51&B=UTF-8&c=https%3A//m.youth.cn/%3F_wdxid%3D000000000000000000000000000000000000000000%26_wdc%3Dy_S396%26_wdt%3D012%26&d=&e=10&f=284bb472dff664e7&H=m.youth.cn&E=0&V=1744874207-1&r=5015b3612cfa16d1&s=0&t=0&u=1&i=en-US&j=0&k=412x823&l=24&m=&n=&o=0cl0.webterren.com/1.gif?z=36&a=19db... https://cl0.webterren.com/1.gif?z=36&a=19db7289026&b=%u4E2D%u56FD%u9752%u5E74%u7F51&B=UTF-8&c=https%3A//m.youth.cn/%3F_wdxid%3D000000000000000000000000000000000000000000%26_wdc%3Dy_S396%26_wdt%3D012%26&d=&e=10&f=284bb472dff664e7&H=m.youth.cn&E=0&V=1744874207-1&r=5015b3612cfa16d1&s=0&t=0&u=1&i=en-US&j=0&k=412x823&l=24&m=&n=&o=0 — 200 — 326 B — 922 ms — http/1.1https://m.youth.cn/favicon.icom.youth.cn/favicon.ico https://m.youth.cn/favicon.ico — -1 — 0 B — 0 ms —
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 863ms · 52KB · ¥43/mo
m.youth.cn
Other
Costly
Execution 421ms
Transfer 7 KB
Monthly Cost ¥21/mo
Unattributable
Other
Costly
Execution 287ms
Transfer 0 KB
Monthly Cost ¥14/mo
news.youth.cn
Other
Optional
Execution 78ms
Transfer 33 KB
Monthly Cost ¥4/mo
hm.baidu.com
Other
Optional
Execution 77ms
Transfer 12 KB
Monthly Cost ¥4/mo

These scripts may cost more than they're worth

  • m.youth.cn adds 421ms and costs ~¥21/month
  • Unattributable adds 287ms and costs ~¥14/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

m.youth.cn takes 421ms 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 287ms 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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