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https://1688.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
2
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
56
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

1.77 s

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

3.06 s

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

325 ms

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

0.008

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

2.83 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.

3.22 s

Page Load Progression

503 ms
1.0 s
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
15
7 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 (585.4 KiB of 585.5 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
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Warning::
https://img.alicdn.com/tfs/TB17G2dJGmWBuNjy1XaXXXC... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://img.alicdn.com/imgextra/i2/O1CN010VLpQY1VW... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 15 KB
0 oversized -0 KB
4 legacy format
3 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

C
JS Execution Cost
Action
1035ms total JS execution
REVIEW
1035ms total JS execution
Warning::
https://g.alicdn.com/secdev/entry/x/0e473074f301b9...: 267ms CPU time
Info::
https://g.alicdn.com/bsop-static/sufei-punish/0.1....: 177ms CPU time
Info::
https://g.alicdn.com/AWSC/fireyejs/1.234.20/fireye...: 156ms CPU time
Info::
https://www.1688.com/: 143ms CPU time
Info::
https://g.alicdn.com/AWSC/nc/1.97.0/nc.js: 111ms CPU time
Warning::
Third-party scripts: 1035ms (100% of total)

Main Thread Breakdown

Script Evaluation 76% Other 11% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://g.alicdn.com/secdev/entry/x/0e473074f301b974.js267ms261ms0ms3rd
https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/punishpage.min.js177ms156ms9ms3rd
https://g.alicdn.com/AWSC/fireyejs/1.234.20/fireyejs.js156ms137ms17ms3rd
https://www.1688.com/143ms55ms6ms3rd
https://g.alicdn.com/AWSC/nc/1.97.0/nc.js111ms84ms2ms3rd
https://g.alicdn.com/AWSC/et/1.83.8/et_f.js101ms91ms8ms3rd
Unattributable80ms2ms0ms3rd
B
JS Bundles
21 scripts, 86 KB unused
REVIEW
21 scripts, 86 KB unused
Warning::
https://g.alicdn.com/AWSC/fireyejs/1.234.20/fireye...: 63 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://g.alicdn.com/bsop-static/sufei-punish/0.1....: 23 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 86 KB
86 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://g.alicdn.com/AWSC/fireyejs/1.234.20/fireyejs.js171 KB63 KB (37%)✓3rd
https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/htmltocanvas.min.js46 KB23 KB (51%)✓3rd
https://g.alicdn.com/alilog/mlog/aplus_v2.js7 KB—✓3rd
https://g.alicdn.com/alilog/??s/8.15.25/plugin/aplus_client.js,aplus_cplugin/0.7.12/toolkit.js,aplus_cplugin/0.7.12/monitor.js,s/8.15.25/aplus_std.js,s/8.15.25/plugin/aplus_spmact.js?v=2026010817155043 KB—✓3rd
https://g.alicdn.com/AWSC/CAPTCHA/0.0.1/awsc.js4 KB—✓3rd
https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/punishpage.min.js36 KB—✓3rd
https://g.alicdn.com/trace/trace/1.3.22/??sdk.js,resourceError-plugin.js,perf-plugin.js24 KB—✓3rd
https://g.alicdn.com/mtb/lib-windvane/3.0.6/windvane.js2 KB—✓3rd
https://g.alicdn.com/AWSC/et/1.83.8/et_f.js89 KB—✓3rd
https://g.alicdn.com/alilog/??/aplus_plugin_b2bfront/index.js,mlog/aplus_v2.js8 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

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

Green Hosting

No green hosting detected

A+
Page Weight Budget
586 KB transferred, 44 requests
PASS
586 KB transferred, 44 requests
Info::
Page weighs 1.7 MB (586 KB transferred)
Info::
44 HTTP requests
Info::
Estimated 0.12 g CO2 per page load
586 KB / 2.4 MB budget
586 KB transferred
44 requests
0.12 g CO2 per page load
JavaScript 426.5 KiB 73%
Other 63.3 KiB 11%
HTML 42.7 KiB 7%
Other 25.1 KiB 4%
Images 14.7 KiB 3%
Fonts 5.7 KiB 1%
CSS 5.4 KiB 1%
Other 2.0 KiB 0%
Other 207 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
1 fonts (6 KB)
PASS
1 fonts (6 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

6 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 FCP 1.8 s LCP 3.1 shttps://at.alicdn.com/t/font_1465353706_4784257.wofffont_1465353706_4784257... https://at.alicdn.com/t/font_1465353706_4784257.woff — 5.7 KiB — 22 ms — font-display: swap
font_1465353706_4784257... woff swap
Size 6 KB
Load time 22 ms
Start 4.0 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 ~2 KB and ~4 ms

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
44 resources · 586 KB · 86 KB savings available
PASS
44 resources · 586 KB · 86 KB savings available
Info::
Within 1MB page-weight target
Got: 586 KB
Info::
~86 KB of savings available
Warning::
43 third-party resources (100% of weight)
44 resources · 585.5 KiB · 43 third-party Within 1MB page-weight target
JavaScript 84% · 493.0 KiB
Document 7% · 43.2 KiB
Other 4% · 21.9 KiB
Image 3% · 16.4 KiB
Font 1% · 5.7 KiB
CSS 1% · 5.4 KiB

~85.9 KiB of savings available

Remove unused JavaScript: 85.9 KiB
Network Waterfall
44 requests over 4304ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.8 s LCP 3.1 shttps://1688.com// https://1688.com/ — 302 — 179 B — 747 ms — http/1.1https://www.1688.com/www.1688.com/ https://www.1688.com/ — 200 — 42.7 KiB — 741 ms — h2https://g.alicdn.com/mtb/lib-flexible/0.3.2/flexible.jsg.alicdn.com/mtb/lib-flexible/0.3.2... https://g.alicdn.com/mtb/lib-flexible/0.3.2/flexible.js — 200 — 1.5 KiB — 34 ms — h2https://g.alicdn.com/sd/punish/0.0.1/qrcode.min.jsg.alicdn.com/sd/punish/0.0.1/qrcode... https://g.alicdn.com/sd/punish/0.0.1/qrcode.min.js — 200 — 7.4 KiB — 36 ms — h2https://g.alicdn.com/mtb/lib-windvane/3.0.6/windvane.jsg.alicdn.com/mtb/lib-windvane/3.0.6... https://g.alicdn.com/mtb/lib-windvane/3.0.6/windvane.js — 200 — 2.4 KiB — 37 ms — h2https://g.alicdn.com/mtb/lib-mtop/2.6.3/mtop.jsg.alicdn.com/mtb/lib-mtop/2.6.3/mto... https://g.alicdn.com/mtb/lib-mtop/2.6.3/mtop.js — 200 — 9.5 KiB — 38 ms — h2https://g.alicdn.com/AWSC/CAPTCHA/0.0.1/awsc.jsg.alicdn.com/AWSC/CAPTCHA/0.0.1/aws... https://g.alicdn.com/AWSC/CAPTCHA/0.0.1/awsc.js — 200 — 3.7 KiB — 39 ms — h2https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/main.cssg.alicdn.com/bsop-static/sufei-puni... https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/main.css — 200 — 5.4 KiB — 30 ms — h2https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/punishpage.min.jsg.alicdn.com/bsop-static/sufei-puni... https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/punishpage.min.js — 200 — 36.4 KiB — 9 ms — h2https://g.alicdn.com/trace/trace/1.3.22/??sdk.js,resourceError-plugin.js,perf-plugin.jsg.alicdn.com/trace/trace/1.3.22/??s... https://g.alicdn.com/trace/trace/1.3.22/??sdk.js,resourceError-plugin.js,perf-plugin.js — 200 — 24.3 KiB — 8 ms — h2https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/htmltocanvas.min.jsg.alicdn.com/bsop-static/sufei-puni... https://g.alicdn.com/bsop-static/sufei-punish/0.1.122/build/htmltocanvas.min.js — 200 — 46.0 KiB — 15 ms — h2https://g.alicdn.com/AWSC/et/1.83.8/et_f.jsg.alicdn.com/AWSC/et/1.83.8/et_f.js https://g.alicdn.com/AWSC/et/1.83.8/et_f.js — 200 — 89.5 KiB — 20 ms — h2https://g.alicdn.com/alilog/??/aplus_plugin_b2bfront/index.js,mlog/aplus_v2.jsg.alicdn.com/alilog/??/aplus_plugin... https://g.alicdn.com/alilog/??/aplus_plugin_b2bfront/index.js,mlog/aplus_v2.js — 200 — 7.8 KiB — 17 ms — h2https://g.alicdn.com/alilog/mlog/aplus_v2.jsg.alicdn.com/alilog/mlog/aplus_v2.j... https://g.alicdn.com/alilog/mlog/aplus_v2.js — 200 — 6.5 KiB — 10 ms — h2https://fourier.alibaba.com/ts?url=&token=gAlkkNGjHObBXu-YHjNWHeqiaxvYN7NQIDCLvWEe3orf2gC-8SW4PzyEw73-maGmj6CJVLgFtWFeXhd964a7OW-t5GjowuaIuk8YUqOVcHNeXhdv64g7OWu-DR6t2qrb-y5UUDu2oyULT_yFatS4coPUTWoEuE4Q0zPUTDkVdHroYch2b38ZFhWRej4uElD8m6fHJz2ub4r0lrG018qZzofFTj4uEuzZ_nB7S8m33j3dW6ErzAiQ70SyckHtkby0tdIQxv3rwbVCRt00KbHQKbTNflDroXV-qhXQbY34guMyvTrrNVFmL-YyaqVuqcGrqCxqbRc-dJcW7GZiUqc3wbYdFzMqVS4j9n1zxxkEw8NC4nZKBqhzn5SrrtWa0m1QuehVd9wzlrqOsr4Qq8zbolLDoOY7UraY6EYcdi2zlrq2oEXMC8zbkuC..&cna=undefined&ext=1fourier.alibaba.com/ts?url=&token=g... https://fourier.alibaba.com/ts?url=&token=gAlkkNGjHObBXu-YHjNWHeqiaxvYN7NQIDCLvWEe3orf2gC-8SW4PzyEw73-maGmj6CJVLgFtWFeXhd964a7OW-t5GjowuaIuk8YUqOVcHNeXhdv64g7OWu-DR6t2qrb-y5UUDu2oyULT_yFatS4coPUTWoEuE4Q0zPUTDkVdHroYch2b38ZFhWRej4uElD8m6fHJz2ub4r0lrG018qZzofFTj4uEuzZ_nB7S8m33j3dW6ErzAiQ70SyckHtkby0tdIQxv3rwbVCRt00KbHQKbTNflDroXV-qhXQbY34guMyvTrrNVFmL-YyaqVuqcGrqCxqbRc-dJcW7GZiUqc3wbYdFzMqVS4j9n1zxxkEw8NC4nZKBqhzn5SrrtWa0m1QuehVd9wzlrqOsr4Qq8zbolLDoOY7UraY6EYcdi2zlrq2oEXMC8zbkuC..&cna=undefined&ext=1 — 200 — 139 B — 943 ms — h2https://g.alicdn.com/alilog/??s/8.15.25/plugin/aplus_client.js,aplus_cplugin/0.7.12/toolkit.js,aplus_cplugin/0.7.12/monitor.js,s/8.15.25/aplus_std.js,s/8.15.25/plugin/aplus_spmact.js?v=20260108171550g.alicdn.com/alilog/??s/8.15.25/plu... https://g.alicdn.com/alilog/??s/8.15.25/plugin/aplus_client.js,aplus_cplugin/0.7.12/toolkit.js,aplus_cplugin/0.7.12/monitor.js,s/8.15.25/aplus_std.js,s/8.15.25/plugin/aplus_spmact.js?v=20260108171550 — 200 — 42.6 KiB — 7 ms — h3https://log.mmstat.com/eg.js?t=1776800506887log.mmstat.com/eg.js?t=177680050688... https://log.mmstat.com/eg.js?t=1776800506887 — 200 — 330 B — 841 ms — h2https://log.mmstat.com/6.gif?logtype=1&title=&pre=&scr=800x600&_p_url=https%3A%2F%2Fwww.1688.com%2F&cna=+8BuIi2gRn4BASoDkMDuwYic&spm-cnt=0.0.0.0.6633fkHWfkHWul&category=&uidaplus=&aplus&asid=AQAAAAD60udpRSJUPAAAAACmhuzefxWqaw==&aat=&abb=&c_signed=&hn=ens%2dcache4%2eus26&at_bu=cbu&sidx=BgnHNZ0wwW4xu9dqtwOBYvdKwYxFDk9iCYWKsIxzM0wGtZ9d3xtHgI8Df/9Dr0VEbYkqOekbLCOoJqkc4lGINpbVeBOthiS9etbMVpLXi+7uySABjr6Iuo7AKkXaG2mcs71qIXtJ9Q+Rccec4fwBdkvx9BXl2/ExIQ8YOGavFrQ=&p=1&o=mac&b=chrome146&s=800x600&w=webkit&ism=mac&cache=c9f42b7&lver=8.15.25&jsver=aplus_std&pver=0.7.12&dpid=6633fkHWfkHWul&tag=0&stag=2&lstag=0&_slog=0log.mmstat.com/6.gif?logtype=1&titl... https://log.mmstat.com/6.gif?logtype=1&title=&pre=&scr=800x600&_p_url=https%3A%2F%2Fwww.1688.com%2F&cna=+8BuIi2gRn4BASoDkMDuwYic&spm-cnt=0.0.0.0.6633fkHWfkHWul&category=&uidaplus=&aplus&asid=AQAAAAD60udpRSJUPAAAAACmhuzefxWqaw==&aat=&abb=&c_signed=&hn=ens%2dcache4%2eus26&at_bu=cbu&sidx=BgnHNZ0wwW4xu9dqtwOBYvdKwYxFDk9iCYWKsIxzM0wGtZ9d3xtHgI8Df/9Dr0VEbYkqOekbLCOoJqkc4lGINpbVeBOthiS9etbMVpLXi+7uySABjr6Iuo7AKkXaG2mcs71qIXtJ9Q+Rccec4fwBdkvx9BXl2/ExIQ8YOGavFrQ=&p=1&o=mac&b=chrome146&s=800x600&w=webkit&ism=mac&cache=c9f42b7&lver=8.15.25&jsver=aplus_std&pver=0.7.12&dpid=6633fkHWfkHWul&tag=0&stag=2&lstag=0&_slog=0 — 200 — 474 B — 211 ms — h2https://g.alicdn.com/secdev/entry/x/0e473074f301b974.jsg.alicdn.com/secdev/entry/x/0e47307... https://g.alicdn.com/secdev/entry/x/0e473074f301b974.js — 200 — 896 B — 5 ms — h3https://g.alicdn.com/sd/punish/0.0.4/program.wasmg.alicdn.com/sd/punish/0.0.4/progra... https://g.alicdn.com/sd/punish/0.0.4/program.wasm — 200 — 20.6 KiB — 6 ms — h3https://www.1688.com/_____tmd_____/punishTextFetch?x5secdata=xg22772d8a370055f1ja0f3057b3fdc432aff075f60f7d0355c61776800506a1732647551a1750343195abaac2aaa33b702939cf75e7f7f90a1b8a98353558f1__bx__www.1688.com%3A443&language=en&action=captcha&v=07344929356625306www.1688.com/_____tmd_____/punishTe... https://www.1688.com/_____tmd_____/punishTextFetch?x5secdata=xg22772d8a370055f1ja0f3057b3fdc432aff075f60f7d0355c61776800506a1732647551a1750343195abaac2aaa33b702939cf75e7f7f90a1b8a98353558f1__bx__www.1688.com%3A443&language=en&action=captcha&v=07344929356625306 — 200 — 280 B — 260 ms — h2data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0…data:image/gif;base64,iVBORw0KGgoAA... data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0… — 200 — 0 B — 1 ms — 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https://cf.aliyun.com/nocaptcha/initialize.jsonp?a=X82Y__3ae6ed0376520147e8c65b0167ab4de2&t=0f3057b3fdc432aff075f60f7d0355c6&scene=register&lang=en&v=v1.3.21&href=https%3A%2F%2Fwww.1688.com%2F&comm={}&callback=initializeJsonp_01503638630129598 — 200 — 276 B — 669 ms — http/1.1https://img.alicdn.com/tfs/TB1uh..zbj1gK0jSZFuXXcrHpXa-16-16.icoimg.alicdn.com/tfs/TB1uh..zbj1gK0jS... https://img.alicdn.com/tfs/TB1uh..zbj1gK0jSZFuXXcrHpXa-16-16.ico — 200 — 1.5 KiB — 24 ms — 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https://www.1688.com/_____tmd_____/report?x5secdata=xg22772d8a370055f1ja0f3057b3fdc432aff075f60f7d0355c61776800506a1732647551a1750343195abaac2aaa33b702939cf75e7f7f90a1b8a98353558f1__bx__www.1688.com:443&type=initSuccess&msg=class%3Dnc_1_nocaptcha%3Dnc_1_nocaptcha%3Dnc_1_wrapperclass%3Dnc_wrapper%3Dnc_1_n1tclass%3Dnc_scale%3Dnc_1__bgclass%3Dnc_bgstyle%3Dwth%3A0px%3Bspan%3Dnc_1_n1zclass%3Dnc_confontbtn_sleara-label%3D%E6%BB%91%E5%9D%97tabnex%3D0role%3Dbuttonstyle%3Dleft%3A0px%3B%EE%98%81span%3Dnc_1__scale_textclass%3Dscale_textsletounlockspanclass%3Dnc-lang-cntata-nc-lang%3DSLIDEPleasesletoerfyspan%3B&uuid=0f3057b3fdc432aff075f60f7d0355c6 — 200 — 85 B — 330 ms — h2https://at.alicdn.com/t/font_1465353706_4784257.woffat.alicdn.com/t/font_1465353706_478... https://at.alicdn.com/t/font_1465353706_4784257.woff — 200 — 5.7 KiB — 22 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 1035ms · 358KB · ¥51/mo
g.alicdn.com
Other
Costly
Execution 267ms
Transfer 1 KB
Monthly Cost ¥13/mo
g.alicdn.com
Other
Optional
Execution 177ms
Transfer 36 KB
Monthly Cost ¥9/mo
g.alicdn.com
Other
Optional
Execution 156ms
Transfer 171 KB
Unused 37%
Monthly Cost ¥8/mo
www.1688.com
Other
Optional
Execution 143ms
Transfer 43 KB
Monthly Cost ¥7/mo
g.alicdn.com
Other
Optional
Execution 111ms
Transfer 18 KB
Monthly Cost ¥5/mo
g.alicdn.com
Other
Optional
Execution 101ms
Transfer 89 KB
Monthly Cost ¥5/mo
Unattributable
Other
Optional
Execution 80ms
Transfer 0 KB
Monthly Cost ¥4/mo

These scripts may cost more than they're worth

  • g.alicdn.com adds 267ms 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

g.alicdn.com takes 267ms 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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