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https://pconline.com.cn

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
3
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
60
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

3.21 s

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

5.70 s

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

3 ms

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

0.097

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

4.07 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.

5.70 s

Page Load Progression

1.1 s
2.3 s
3.4 s
4.5 s
5.7 s
6.8 s
7.9 s
9.1 s
Checks
15
7 PASS 3 REVIEW 3 FIX
F
Page Weight Budget
Action
5.5 MB transferred, 189 requests
FIX
5.5 MB transferred, 189 requests
Critical::
Page weighs 6.1 MB (5.5 MB transferred)
Warning::
Images are 5.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.3 MB
Warning::
189 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.2 g CO2 per page load
5.5 MB / 2.4 MB budget
5.5 MB transferred
189 requests
1.2 g CO2 per page load
Images 5.3 MiB 96%
JavaScript 172.1 KiB 3%
HTML 58.8 KiB 1%
CSS 19.8 KiB 0%
Other 1.6 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

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 (5.5 MiB of 5.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
189 resources · 5.5 MB · 40 KB savings available
FIX
189 resources · 5.5 MB · 40 KB savings available
Warning::
Page weight 4.5 MB over 1MB target
Got: 5.5 MB Expected: ≤ 1 MB
Warning::
188 third-party resources (100% of weight)
Info::
4 resources over 200KB
189 resources · 5.5 MiB · 188 third-party 4.5 MiB over 1MB target
Image 96% · 5.3 MiB
JavaScript 3% · 172.1 KiB
Document 1% · 58.9 KiB
CSS 0% · 19.8 KiB

~40.0 KiB of savings available

Remove unused JavaScript: 40.0 KiB
C
Image Optimization
Action
170 images, 0 KB saveable
REVIEW
170 images, 0 KB saveable
Warning::
https://www1.pconline.com.cn/sale/2026/images/0306... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://imgad0.pconline.com.cn/ivy/image/202511/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://imgad0.pconline.com.cn/ivy/image/20261/14/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://imgad0.pconline.com.cn/ivy/image/20261/5/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
170 images 5.3 MB
0 oversized -0 KB
167 legacy format
4 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

C
JS Execution Cost
Action
1520ms total JS execution
REVIEW
1520ms total JS execution
Warning::
https://www.pconline.com.cn/: 975ms CPU time
Warning::
Unattributable: 260ms CPU time
Info::
https://js.3conline.com/pconlinenew/data/2023/cms/...: 232ms CPU time
Info::
https://js.3conline.com/pconlinenew/data/common/lo...: 52ms CPU time
Warning::
Third-party scripts: 1520ms (100% of total)

Main Thread Breakdown

Rendering 33% Other 33% Style & Layout 19% Script Evaluation 10%
ScriptTotalScriptingParse/CompileParty
https://www.pconline.com.cn/975ms25ms6ms3rd
Unattributable260ms3ms0ms3rd
https://js.3conline.com/pconlinenew/data/2023/cms/home/js/home.js?t=0714232ms73ms0ms3rd
https://js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js52ms22ms25ms3rd
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
JS Bundles
13 scripts, 40 KB unused
PASS
13 scripts, 40 KB unused
Warning::
https://js.3conline.com/pconlinenew/data/common/lo...: 40 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.3conline.com/pconlinenew/data/common/lo...: unminified — 12 KB could be saved
Info::
Total unused JavaScript: 40 KB
40 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js50 KB40 KB (81%)✗3rd
https://js.3conline.com/min/temp/v2/single-lazy.js2 KB—✓3rd
https://js.3conline.com/min/temp/v1/lib-jquery1.10.2,dpl-jquery.slide.js38 KB—✓3rd
https://www.pconline.com.cn/_hux_/index.js4 KB—✓3rd
https://js.3conline.com/pconlinenew/data/2023/cms/home/js/home.js?t=07145 KB—✓3rd
https://ivy.pconline.com.cn/online-u-self.jsp0 KB—✓3rd
https://ivy.pconline.com.cn/online-c-self.jsp0 KB—✓3rd
https://ivy.pconline.com.cn/show4?opt=1&id=pc.sy.banner.qp.;pc.sy.banner.syzq.;pc.sy.banner.dbtlsj.;pc.sy.banner.dbtl.;pc.sy.banner.dbtl2.;pc.sy.banner.dbtl3.;pc.sy.banner.dbtlxj.;pc.sy.banner.zu.tl1.;pc.sy.banner.zu.tl2.;pc.sy.banner.yc1.;pc.sy.banner.zu.tl3.;pc.sy.banner.zu.tl4.;pc.sy.banner.zu.tl5.;pc.sy.banner.yhxx_.;pc.sy.banner.sytl6.;pc.sy.banner.yc3.;pc.sy.banner.sytl7.;pc.sy.banner.duilian.;pc.sy.banner.fdtb_z.;pc.sy.banner.dbsp.;pc.sy.ycfb.61 KB—✓3rd
https://count5.pconline.com.cn/newcount/count.php?channel=144&screen=800*600&refer=&anticache=1776890888908&url=https%3A%2F%2Fwww.pconline.com.cn%2F&from=cms&iframeCode=00 KB—✓3rd
https://jwz.3conline.com/adpuba/online_test_show?id=pc.sy.test15.&media=js&channel=dynamic3 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

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
HTTP Caching
max-age=900 (15 minutes)
PASS
max-age=900 (15 minutes)
Info::
Cache-Control header is set
Got: max-age=900
Info::
Effective TTL: 15 minutes (max-age=900)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=900

DirectiveValueMeaning
max-age900Cache for 15 minutes
Effective TTL: 900 seconds
Network Waterfall
189 requests over 8844ms
INFO
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 9.0 s FCP 3.2 s LCP 5.7 shttps://pconline.com.cn// https://pconline.com.cn/ — 301 — 133 B — 654 ms — h2https://www.pconline.com.cn/www.pconline.com.cn/ https://www.pconline.com.cn/ — 200 — 58.8 KiB — 783 ms — h2https://js.3conline.com/pconlinenew/data/2023/cms/home/css/home.css?t=20260422-1js.3conline.com/pconlinenew/data/20... https://js.3conline.com/pconlinenew/data/2023/cms/home/css/home.css?t=20260422-1 — 200 — 11.1 KiB — 757 ms — h2https://js.3conline.com/pconlinenew/data/2023/cms/home/css/zp.css?t=20260422-1js.3conline.com/pconlinenew/data/20... https://js.3conline.com/pconlinenew/data/2023/cms/home/css/zp.css?t=20260422-1 — 200 — 5.8 KiB — 775 ms — h2https://www.pconline.com.cn/_hux_/index.jswww.pconline.com.cn/_hux_/index.js https://www.pconline.com.cn/_hux_/index.js — 200 — 3.7 KiB — 206 ms — h2https://jwz.3conline.com/adpuba/online_test_show?id=pc.sy.test15.&media=js&channel=dynamicjwz.3conline.com/adpuba/online_test... https://jwz.3conline.com/adpuba/online_test_show?id=pc.sy.test15.&media=js&channel=dynamic — 200 — 3.4 KiB — 697 ms — h2https://www1.pconline.com.cn/2023/cms/home/images/qr-online-wx.pngwww1.pconline.com.cn/2023/cms/home/... https://www1.pconline.com.cn/2023/cms/home/images/qr-online-wx.png — 200 — 23.2 KiB — 225 ms — h2https://www1.pconline.com.cn/cms/gz20240221/pc/home/images/home-top-pop.jpgwww1.pconline.com.cn/cms/gz20240221... https://www1.pconline.com.cn/cms/gz20240221/pc/home/images/home-top-pop.jpg — 200 — 66.1 KiB — 402 ms — h2https://www1.pconline.com.cn/sale/2026/images/0306/banner.pngwww1.pconline.com.cn/sale/2026/imag... https://www1.pconline.com.cn/sale/2026/images/0306/banner.png — 200 — 67.1 KiB — 260 ms — h2https://www.pconline.com.cn/blank.gifwww.pconline.com.cn/blank.gif https://www.pconline.com.cn/blank.gif — 200 — 353 B — 199 ms — h2https://www1.pconline.com.cn/2024/cms/hotchannel/logo/home-hotchannel.pngwww1.pconline.com.cn/2024/cms/hotch... https://www1.pconline.com.cn/2024/cms/hotchannel/logo/home-hotchannel.png — 200 — 23.1 KiB — 215 ms — h2https://js.3conline.com/min/temp/v1/lib-jquery1.10.2,dpl-jquery.slide.jsjs.3conline.com/min/temp/v1/lib-jqu... https://js.3conline.com/min/temp/v1/lib-jquery1.10.2,dpl-jquery.slide.js — 200 — 37.8 KiB — 378 ms — h2https://js.3conline.com/min/temp/v2/single-lazy.jsjs.3conline.com/min/temp/v2/single-... https://js.3conline.com/min/temp/v2/single-lazy.js — 200 — 1.9 KiB — 286 ms — h2https://js.3conline.com/pconlinenew/data/2023/cms/home/js/home.js?t=0714js.3conline.com/pconlinenew/data/20... https://js.3conline.com/pconlinenew/data/2023/cms/home/js/home.js?t=0714 — 200 — 4.6 KiB — 217 ms — h2https://img0.pconline.com.cn/pconline/test/2023/focus/corecha/2601/20261/22/17690760684797540.jpgimg0.pconline.com.cn/pconline/test/... https://img0.pconline.com.cn/pconline/test/2023/focus/corecha/2601/20261/22/17690760684797540.jpg — 200 — 85.6 KiB — 890 ms — h2https://img0.pconline.com.cn/pconline/test/2023/focus/corecha/2603/20263/19/17738876425465860.pngimg0.pconline.com.cn/pconline/test/... https://img0.pconline.com.cn/pconline/test/2023/focus/corecha/2603/20263/19/17738876425465860.png — 200 — 1.5 MiB — 1.8 s — h2https://img0.pconline.com.cn/pconline/test/2023/focus/corecha/2505/20255/23/17479653874496230.jpgimg0.pconline.com.cn/pconline/test/... https://img0.pconline.com.cn/pconline/test/2023/focus/corecha/2505/20255/23/17479653874496230.jpg — 200 — 21.7 KiB — 1.4 s — h2https://www1.pconline.com.cn/2023/cms/home/images/img_jubao.jpgwww1.pconline.com.cn/2023/cms/home/... https://www1.pconline.com.cn/2023/cms/home/images/img_jubao.jpg — 200 — 25.5 KiB — 221 ms — h2https://www1.pconline.com.cn/2022/home/qrcode/QRcode.pngwww1.pconline.com.cn/2022/home/qrco... https://www1.pconline.com.cn/2022/home/qrcode/QRcode.png — 200 — 12.8 KiB — 230 ms — h2https://ivy.pconline.com.cn/online-u-self.jspivy.pconline.com.cn/online-u-self.j... https://ivy.pconline.com.cn/online-u-self.jsp — 200 — 285 B — 654 ms — h2https://ivy.pconline.com.cn/online-c-self.jspivy.pconline.com.cn/online-c-self.j... https://ivy.pconline.com.cn/online-c-self.jsp — 200 — 285 B — 652 ms — h2https://ivy.pconline.com.cn/adpuba/click?id=pc.sy.test15.&adid=186537&watch=0ivy.pconline.com.cn/adpuba/click?id... https://ivy.pconline.com.cn/adpuba/click?id=pc.sy.test15.&adid=186537&watch=0 — 302 — 218 B — 655 ms — h2https://ivy.pconline.com.cn/show4?opt=1&id=pc.sy.banner.qp.;pc.sy.banner.syzq.;pc.sy.banner.dbtlsj.;pc.sy.banner.dbtl.;pc.sy.banner.dbtl2.;pc.sy.banner.dbtl3.;pc.sy.banner.dbtlxj.;pc.sy.banner.zu.tl1.;pc.sy.banner.zu.tl2.;pc.sy.banner.yc1.;pc.sy.banner.zu.tl3.;pc.sy.banner.zu.tl4.;pc.sy.banner.zu.tl5.;pc.sy.banner.yhxx_.;pc.sy.banner.sytl6.;pc.sy.banner.yc3.;pc.sy.banner.sytl7.;pc.sy.banner.duilian.;pc.sy.banner.fdtb_z.;pc.sy.banner.dbsp.;pc.sy.ycfb.ivy.pconline.com.cn/show4?opt=1&id=... https://ivy.pconline.com.cn/show4?opt=1&id=pc.sy.banner.qp.;pc.sy.banner.syzq.;pc.sy.banner.dbtlsj.;pc.sy.banner.dbtl.;pc.sy.banner.dbtl2.;pc.sy.banner.dbtl3.;pc.sy.banner.dbtlxj.;pc.sy.banner.zu.tl1.;pc.sy.banner.zu.tl2.;pc.sy.banner.yc1.;pc.sy.banner.zu.tl3.;pc.sy.banner.zu.tl4.;pc.sy.banner.zu.tl5.;pc.sy.banner.yhxx_.;pc.sy.banner.sytl6.;pc.sy.banner.yc3.;pc.sy.banner.sytl7.;pc.sy.banner.duilian.;pc.sy.banner.fdtb_z.;pc.sy.banner.dbsp.;pc.sy.ycfb. — 200 — 61.2 KiB — 1.1 s — h2https://count5.pconline.com.cn/newcount/count.php?channel=144&screen=800*600&refer=&anticache=1776890888908&url=https%3A%2F%2Fwww.pconline.com.cn%2F&from=cms&iframeCode=0count5.pconline.com.cn/newcount/cou... https://count5.pconline.com.cn/newcount/count.php?channel=144&screen=800*600&refer=&anticache=1776890888908&url=https%3A%2F%2Fwww.pconline.com.cn%2F&from=cms&iframeCode=0 — 200 — 437 B — 712 ms — h2https://js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.jsjs.3conline.com/pconlinenew/data/co... https://js.3conline.com/pconlinenew/data/common/login/js/pconline_login_pop.js — 200 — 49.8 KiB — 243 ms — h2https://imgad0.pconline.com.cn/ivy/image/20264/20/17766681201860480.gifimgad0.pconline.com.cn/ivy/image/20... https://imgad0.pconline.com.cn/ivy/image/20264/20/17766681201860480.gif — 200 — 35.9 KiB — 746 ms — h2https://www1.pconline.com.cn/zt/20160901/ad1p.pngwww1.pconline.com.cn/zt/20160901/ad... https://www1.pconline.com.cn/zt/20160901/ad1p.png — 200 — 1.3 KiB — 209 ms — h2https://g.cn.miaozhen.com/x/k=2497011&p=92uwh&rt=2&pro=s&dx=__IPDX__&ns=__IP__&ni=__IESID__&v=__LOC__&xa=__ADPLATFORM__&tr=__REQUESTID__&vg=__AUTOPLAY__&nh=__AUTOREFRESH__&mo=__OS__&m0=__OPENUDID__&m0a=__DUID__&m1=__ANDROIDID1__&m1a=__ANDROIDID__&m2=__IMEI__&m4=__AAID__&m5=__IDFA__&m6=__MAC1__&m6a=__MAC__&m11=__OAID__&m14=__CAID__&m5a=__IDFV__&mn=__ANAME__&m5b=__IDFA1__&m11a=__OAID1__&m14a=__CAID1__&gc=__GCID__&o=g.cn.miaozhen.com/x/k=2497011&p=92u... https://g.cn.miaozhen.com/x/k=2497011&p=92uwh&rt=2&pro=s&dx=__IPDX__&ns=__IP__&ni=__IESID__&v=__LOC__&xa=__ADPLATFORM__&tr=__REQUESTID__&vg=__AUTOPLAY__&nh=__AUTOREFRESH__&mo=__OS__&m0=__OPENUDID__&m0a=__DUID__&m1=__ANDROIDID1__&m1a=__ANDROIDID__&m2=__IMEI__&m4=__AAID__&m5=__IDFA__&m6=__MAC1__&m6a=__MAC__&m11=__OAID__&m14=__CAID__&m5a=__IDFV__&mn=__ANAME__&m5b=__IDFA1__&m11a=__OAID1__&m14a=__CAID1__&gc=__GCID__&o= — 200 — 570 B — 961 ms — h2https://www1.pconline.com.cn/cms/home/20251128/images/pconline_home_logo.pngwww1.pconline.com.cn/cms/home/20251... https://www1.pconline.com.cn/cms/home/20251128/images/pconline_home_logo.png — 200 — 31.6 KiB — 231 ms — h2https://www1.pconline.com.cn/2023/cms/home/images/ico-gzh.pngwww1.pconline.com.cn/2023/cms/home/... https://www1.pconline.com.cn/2023/cms/home/images/ico-gzh.png — 200 — 1.8 KiB — 232 ms — h2
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 9.0 s FCP 3.2 s LCP 5.7 shttps://pconline.com.cn// https://pconline.com.cn/ — 301 — 133 B — 654 ms — h2https://www.pconline.com.cn/www.pconline.com.cn/ https://www.pconline.com.cn/ — 200 — 58.8 KiB — 783 ms — h2https://js.3conline.com/pconlinenew/data/2023/cms/home/css/home.css?t=20260422-1js.3conline.com/pconlinenew/data/20... https://js.3conline.com/pconlinenew/data/2023/cms/home/css/home.css?t=20260422-1 — 200 — 11.1 KiB — 757 ms — h2https://js.3conline.com/pconlinenew/data/2023/cms/home/css/zp.css?t=20260422-1js.3conline.com/pconlinenew/data/20... https://js.3conline.com/pconlinenew/data/2023/cms/home/css/zp.css?t=20260422-1 — 200 — 5.8 KiB — 775 ms — h2https://www.pconline.com.cn/_hux_/index.jswww.pconline.com.cn/_hux_/index.js https://www.pconline.com.cn/_hux_/index.js — 200 — 3.7 KiB — 206 ms — h2https://jwz.3conline.com/adpuba/online_test_show?id=pc.sy.test15.&media=js&channel=dynamicjwz.3conline.com/adpuba/online_test... https://jwz.3conline.com/adpuba/online_test_show?id=pc.sy.test15.&media=js&channel=dynamic — 200 — 3.4 KiB — 697 ms — h2https://www1.pconline.com.cn/2023/cms/home/images/qr-online-wx.pngwww1.pconline.com.cn/2023/cms/home/... https://www1.pconline.com.cn/2023/cms/home/images/qr-online-wx.png — 200 — 23.2 KiB — 225 ms — h2https://www1.pconline.com.cn/cms/gz20240221/pc/home/images/home-top-pop.jpgwww1.pconline.com.cn/cms/gz20240221... https://www1.pconline.com.cn/cms/gz20240221/pc/home/images/home-top-pop.jpg — 200 — 66.1 KiB — 402 ms — h2https://www1.pconline.com.cn/sale/2026/images/0306/banner.pngwww1.pconline.com.cn/sale/2026/imag... https://www1.pconline.com.cn/sale/2026/images/0306/banner.png — 200 — 67.1 KiB — 260 ms — h2https://www.pconline.com.cn/blank.gifwww.pconline.com.cn/blank.gif https://www.pconline.com.cn/blank.gif — 200 — 353 B — 199 ms — h2https://www1.pconline.com.cn/2024/cms/hotchannel/logo/home-hotchannel.pngwww1.pconline.com.cn/2024/cms/hotch... 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h2https://img4.pconline.com.cn/pconline/images/product/20251201/40951634_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20251201/40951634_sn.jpg — 200 — 6.2 KiB — 204 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260204/46575708_sn.pngimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260204/46575708_sn.png — 200 — 10.1 KiB — 200 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260401/49057429_sn.pngimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260401/49057429_sn.png — 200 — 9.9 KiB — 201 ms — h2https://img4.pconline.com.cn/pconline/images/product/20251226/43113228_sn.pngimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20251226/43113228_sn.png — 200 — 9.1 KiB — 204 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260421/49841034_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260421/49841034_sn.jpg — 200 — 2.9 KiB — 204 ms — h2https://img4.pconline.com.cn/pconline/images/product/20241106/23359442_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20241106/23359442_sn.jpg — 200 — 3.2 KiB — 204 ms — h2https://img4.pconline.com.cn/pconline/images/pconline_cms/20260109/44453916.jpg?x-oss-process=image/resize,w_400,h_300,m_fillimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/pconline_cms/20260109/44453916.jpg?x-oss-process=image/resize,w_400,h_300,m_fill — 200 — 210.9 KiB — 256 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260323/48588598_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260323/48588598_sn.jpg — 200 — 6.2 KiB — 200 ms — h2https://img.pconline.com.cn/images/product/6462/646213/1_sn.jpgimg.pconline.com.cn/images/product/... https://img.pconline.com.cn/images/product/6462/646213/1_sn.jpg — 200 — 10.1 KiB — 1.1 s — h2https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301115_1677047310461_thumb.pngimg.pconline.com.cn/images/upload/u... https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301115_1677047310461_thumb.png — 200 — 1.2 KiB — 1.1 s — h2https://img4.pconline.com.cn/pconline/images/product/20260228/47464116_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260228/47464116_sn.jpg — 200 — 5.8 KiB — 200 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250915/34426142_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250915/34426142_sn.jpg — 200 — 5.7 KiB — 203 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250509/25788139_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250509/25788139_sn.jpg — 200 — 6.7 KiB — 204 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250519/26057657_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250519/26057657_sn.jpg — 200 — 6.3 KiB — 205 ms — h2https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301079_1677047310294_thumb.pngimg.pconline.com.cn/images/upload/u... https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301079_1677047310294_thumb.png — 200 — 2.1 KiB — 933 ms — h2https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301154_1677047310606_thumb.pngimg.pconline.com.cn/images/upload/u... https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301154_1677047310606_thumb.png — 200 — 4.3 KiB — 934 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260414/49562817_sn.pngimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260414/49562817_sn.png — 200 — 11.3 KiB — 201 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260121/45653436_sn.pngimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260121/45653436_sn.png — 200 — 10.1 KiB — 203 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250804/31556157_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250804/31556157_sn.jpg — 200 — 6.5 KiB — 200 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250509/25788687_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250509/25788687_sn.jpg — 200 — 2.8 KiB — 207 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260414/49574835_sn.pngimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260414/49574835_sn.png — 200 — 10.8 KiB — 204 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250908/33948640_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250908/33948640_sn.jpg — 200 — 5.7 KiB — 205 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250811/32034000_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250811/32034000_sn.jpg — 200 — 6.8 KiB — 201 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250307/24836247_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250307/24836247_sn.jpg — 200 — 7.1 KiB — 200 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260304/47655350_sn.jpegimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260304/47655350_sn.jpeg — 200 — 4.1 KiB — 199 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260407/49299854_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260407/49299854_sn.jpg — 200 — 5.7 KiB — 203 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260416/49671533_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260416/49671533_sn.jpg — 200 — 1.8 KiB — 204 ms — h2https://img4.pconline.com.cn/pconline/images/product/20231026/14466139_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20231026/14466139_sn.jpg — 200 — 1.8 KiB — 205 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250120/24371609_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250120/24371609_sn.jpg — 200 — 2.6 KiB — 199 ms — h2https://img4.pconline.com.cn/pconline/images/product/20221102/2998162_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20221102/2998162_sn.jpg — 200 — 2.9 KiB — 199 ms — h2https://img4.pconline.com.cn/pconline/images/product/20251107/38397084_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20251107/38397084_sn.jpg — 200 — 2.9 KiB — 199 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250528/26433870_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250528/26433870_sn.jpg — 200 — 2.9 KiB — 203 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250904/33736430_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250904/33736430_sn.jpg — 200 — 2.4 KiB — 201 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250828/33270198_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250828/33270198_sn.jpg — 200 — 5.6 KiB — 202 ms — h2https://img4.pconline.com.cn/pconline/images/product/20230420/8526770_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20230420/8526770_sn.jpg — 200 — 2.7 KiB — 199 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250327/25125956_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250327/25125956_sn.jpg — 200 — 2.6 KiB — 199 ms — h2https://img4.pconline.com.cn/pconline/images/product/20251203/41067084_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20251203/41067084_sn.jpg — 200 — 3.1 KiB — 200 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250716/30266164_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250716/30266164_sn.jpg — 200 — 2.5 KiB — 203 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250918/34606672_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250918/34606672_sn.jpg — 200 — 1.7 KiB — 202 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260326/48757009_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260326/48757009_sn.jpg — 200 — 2.4 KiB — 203 ms — h2https://img4.pconline.com.cn/pconline/images/product/20251102/38027459_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20251102/38027459_sn.jpg — 200 — 2.6 KiB — 200 ms — h2https://img4.pconline.com.cn/pconline/images/product/20250610/26661163_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20250610/26661163_sn.jpg — 200 — 1.1 KiB — 200 ms — h2https://img4.pconline.com.cn/pconline/images/product/20260209/46781094_sn.jpgimg4.pconline.com.cn/pconline/image... https://img4.pconline.com.cn/pconline/images/product/20260209/46781094_sn.jpg — 200 — 5.3 KiB — 199 ms — h2https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301155_1677047311014_thumb.pngimg.pconline.com.cn/images/upload/u... https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301155_1677047311014_thumb.png — 200 — 1.4 KiB — 202 ms — h2https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301078_1677047309896_thumb.pngimg.pconline.com.cn/images/upload/u... https://img.pconline.com.cn/images/upload/upc/tx/onlinecms/2302/22/c0/351301078_1677047309896_thumb.png — 200 — 2.5 KiB — 203 ms — h2https://www1.pconline.com.cn/bbs/2017huawei.jpgwww1.pconline.com.cn/bbs/2017huawei... https://www1.pconline.com.cn/bbs/2017huawei.jpg — 200 — 4.6 KiB — 203 ms — h2https://www.pconline.com.cn/favicon.icowww.pconline.com.cn/favicon.ico https://www.pconline.com.cn/favicon.ico — 200 — 1.4 KiB — 199 ms — h2https://img0.pconline.com.cn/pconline/test/2023/focus/big/2604/20264/22/17768303468185670.jpgimg0.pconline.com.cn/pconline/test/... https://img0.pconline.com.cn/pconline/test/2023/focus/big/2604/20264/22/17768303468185670.jpg — 200 — 59.0 KiB — 220 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 1520ms · 113KB · ¥75/mo
www.pconline.com.cn
Other
Costly
Execution 975ms
Transfer 59 KB
Monthly Cost ¥48/mo
Unattributable
Other
Costly
Execution 260ms
Transfer 0 KB
Monthly Cost ¥13/mo
js.3conline.com
Other
Costly
Execution 232ms
Transfer 5 KB
Monthly Cost ¥11/mo
js.3conline.com
Other
Optional
Execution 52ms
Transfer 50 KB
Unused 81%
Monthly Cost ¥3/mo

These scripts may cost more than they're worth

  • www.pconline.com.cn adds 975ms and costs ~¥48/month
  • Unattributable adds 260ms and costs ~¥13/month
  • js.3conline.com adds 232ms and costs ~¥11/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.pconline.com.cn takes 975ms 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 260ms 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

js.3conline.com takes 232ms 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

81% of js.3conline.com'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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