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https://kuaishou.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

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

Mobile Desktop
61
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
64
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

4.96 s

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

7.59 s

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

12 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.

6.65 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.

7.91 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
9 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 (534.9 KiB of 535.1 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
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s1-11674.kwimgs.com/kos/nlav11674/static/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s1-11674.kwimgs.com/udata/pkg/fe/home_slog... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s1-11674.kwimgs.com/kos/nlav11674/static/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s1-11674.kwimgs.com/kos/nlav11674/static/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 230 KB
0 oversized -0 KB
10 legacy format
5 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

C
JS Bundles
Action
4 scripts, 219 KB unused
REVIEW
4 scripts, 219 KB unused
Warning::
https://s1-11674.kwimgs.com/kos/nlav11674/static/c...: 219 KB unused (87%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 219 KB
219 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s1-11674.kwimgs.com/kos/nlav11674/static/common/vendor-1357ad8b.js253 KB219 KB (87%)✓3rd
https://s1-11674.kwimgs.com/udata/pkg/fe/ks-log.2.0.0-rc6.js3 KB—✓3rd
https://s1-11674.kwimgs.com/kos/nlav11674/static/common/manifest-a819b4f2.js5 KB—✓3rd
https://s1-11674.kwimgs.com/kos/nlav11674/static/pages/index/index-97f07db6.js2 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
Page Weight Inventory
27 resources · 535 KB · 219 KB savings available
REVIEW
27 resources · 535 KB · 219 KB savings available
Info::
Within 1MB page-weight target
Got: 535 KB
Info::
~219 KB of savings available
Warning::
26 third-party resources (100% of weight)
Info::
1 resources over 200KB
27 resources · 535.1 KiB · 26 third-party Within 1MB page-weight target
JavaScript 49% · 261.9 KiB
Image 46% · 244.6 KiB
CSS 3% · 14.9 KiB
Document 2% · 12.7 KiB
Other 0% · 1.0 KiB

~218.6 KiB of savings available

Remove unused JavaScript: 218.6 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
535 KB transferred, 27 requests
PASS
535 KB transferred, 27 requests
Info::
Page weighs 1.1 MB (535 KB transferred)
Info::
27 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
535 KB / 2.4 MB budget
535 KB transferred
27 requests
0.11 g CO2 per page load
JavaScript 261.9 KiB 49%
Images 229.5 KiB 43%
Other 15.5 KiB 3%
CSS 14.9 KiB 3%
HTML 12.2 KiB 2%
Other 1.0 KiB 0%
Other 0 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+
JS Execution Cost
492ms total JS execution
PASS
492ms total JS execution
Info::
https://m.kuaishou.com/: 172ms CPU time
Info::
Unattributable: 131ms CPU time
Info::
https://s1-11674.kwimgs.com/kos/nlav11674/static/p...: 108ms CPU time
Info::
https://s1-11674.kwimgs.com/kos/nlav11674/static/c...: 81ms CPU time
Warning::
Third-party scripts: 492ms (100% of total)

Main Thread Breakdown

Other 30% Script Evaluation 26% Style & Layout 25% Script Parsing & Compilation 15%
ScriptTotalScriptingParse/CompileParty
https://m.kuaishou.com/172ms9ms2ms3rd
Unattributable131ms4ms0ms3rd
https://s1-11674.kwimgs.com/kos/nlav11674/static/pages/index/index-97f07db6.js108ms102ms0ms3rd
https://s1-11674.kwimgs.com/kos/nlav11674/static/common/vendor-1357ad8b.js81ms2ms71ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
27 requests over 4575ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 5.0 s LCP 7.6 shttps://kuaishou.com// https://kuaishou.com/ — 301 — 237 B — 724 ms — http/1.1https://www.kuaishou.com/www.kuaishou.com/ https://www.kuaishou.com/ — 302 — 284 B — 971 ms — http/1.1https://m.kuaishou.com/m.kuaishou.com/ https://m.kuaishou.com/ — 200 — 12.2 KiB — 771 ms — http/1.1https://s1-11674.kwimgs.com/udata/pkg/fe/ks-log.2.0.0-rc6.jss1-11674.kwimgs.com/udata/pkg/fe/ks... https://s1-11674.kwimgs.com/udata/pkg/fe/ks-log.2.0.0-rc6.js — 200 — 2.8 KiB — 332 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/common/vendor-3c6ce6fa.chunk.csss1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/common/vendor-3c6ce6fa.chunk.css — 200 — 1.8 KiB — 335 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/common/manifest-7bf86324.chunk.csss1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/common/manifest-7bf86324.chunk.css — 200 — 11.9 KiB — 333 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/pages/index/index-c90aedbe.csss1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/pages/index/index-c90aedbe.css — 200 — 1.2 KiB — 334 ms — h2https://s1-11674.kwimgs.com/udata/pkg/fe/home_slogan.b109830a.pngs1-11674.kwimgs.com/udata/pkg/fe/ho... https://s1-11674.kwimgs.com/udata/pkg/fe/home_slogan.b109830a.png — 200 — 7.9 KiB — 333 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic1-01b524b2.pngs1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic1-01b524b2.png — 200 — 61.4 KiB — 334 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic2-ebb42da9.pngs1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic2-ebb42da9.png — 200 — 49.4 KiB — 6 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic3-44b7f9ea.pngs1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic3-44b7f9ea.png — 200 — 63.7 KiB — 7 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAAEsBAMAAACLU5NGAAAAJ1BMVEXzeAL5jwH3iAH7mAD2ggL1f…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAAEsBAMAAACLU5NGAAAAJ1BMVEXzeAL5jwH3iAH7mAD2ggL1f… — 200 — 0 B — 0 ms — datahttps://s1-11674.kwimgs.com/kos/nlav11674/static/common/vendor-1357ad8b.jss1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/common/vendor-1357ad8b.js — 200 — 252.7 KiB — 16 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/common/manifest-a819b4f2.jss1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/common/manifest-a819b4f2.js — 200 — 4.6 KiB — 7 ms — h2https://s1-11674.kwimgs.com/kos/nlav11674/static/pages/index/index-97f07db6.jss1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/pages/index/index-97f07db6.js — 200 — 1.8 KiB — 7 ms — h2https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818673440&deviceResolution=721x1440.25&screen=412x823&event=task&action=COUNT&tag=log_start_h5_home&pageTag=m-official-page&bizName=main-app-h5-homewlog.kuaishou.com/rest/n/log/web/co... https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818673440&deviceResolution=721x1440.25&screen=412x823&event=task&action=COUNT&tag=log_start_h5_home&pageTag=m-official-page&bizName=main-app-h5-home — 200 — 228 B — 1.2 s — http/1.1data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEYAAABGCAMAAABG8BK2AAAAilBMVEVHcEzi4uLi4uLi4uLi4uLi4…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEYAAABGCAMAAABG8BK2AAAAilBMVEVHcEzi4uLi4uLi4uLi4uLi4… — 200 — 0 B — 0 ms — datahttps://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic0-ac88dd16.pngs1-11674.kwimgs.com/kos/nlav11674/s... https://s1-11674.kwimgs.com/kos/nlav11674/static/assets/img/pic0-ac88dd16.png — 200 — 43.4 KiB — 9 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEYAAABGCAMAAABG8BK2AAAAxlBMVEVHcEwdJSoiLjMvREgnP0MwV…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEYAAABGCAMAAABG8BK2AAAAxlBMVEVHcEwdJSoiLjMvREgnP0MwV… — 200 — 0 B — 0 ms — datahttps://s1-11674.kwimgs.com/udata/pkg/fe/kwai_logo.fc61f660.pngs1-11674.kwimgs.com/udata/pkg/fe/kw... https://s1-11674.kwimgs.com/udata/pkg/fe/kwai_logo.fc61f660.png — 200 — 2.9 KiB — 7 ms — h2https://m.kuaishou.com/rest/wd/ugH5App/download/kwaim.kuaishou.com/rest/wd/ugH5App/down... https://m.kuaishou.com/rest/wd/ugH5App/download/kwai — 200 — 533 B — 241 ms — http/1.1https://m.kuaishou.com/rest/wd/ugH5App/download/kwaim.kuaishou.com/rest/wd/ugH5App/down... https://m.kuaishou.com/rest/wd/ugH5App/download/kwai — 200 — 536 B — 431 ms — http/1.1https://log-sdk.ksapisrv.com/rest/wd/common/log/collect/misc2?v=3.9.30&kpn=undefinedlog-sdk.ksapisrv.com/rest/wd/common... https://log-sdk.ksapisrv.com/rest/wd/common/log/collect/misc2?v=3.9.30&kpn=undefined — 200 — 0 B — 923 ms — h2https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818673525&deviceResolution=721x1440.25&screen=412x823&event=task&action=COUNT&tag=log_end_h5_home&pageTag=m-official-page&bizName=main-app-h5-homewlog.kuaishou.com/rest/n/log/web/co... https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818673525&deviceResolution=721x1440.25&screen=412x823&event=task&action=COUNT&tag=log_end_h5_home&pageTag=m-official-page&bizName=main-app-h5-home — 200 — 228 B — 1.1 s — http/1.1https://s1-11674.kwimgs.com/udata/pkg/fe/favicon.70ff1fcc.icos1-11674.kwimgs.com/udata/pkg/fe/fa... https://s1-11674.kwimgs.com/udata/pkg/fe/favicon.70ff1fcc.ico — 200 — 15.0 KiB — 4 ms — h2https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818674819&deviceResolution=721x1440.25&screen=412x823&event=pv&pageTag=m-official-page&bizName=main-app-h5-homewlog.kuaishou.com/rest/n/log/web/co... https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818674819&deviceResolution=721x1440.25&screen=412x823&event=pv&pageTag=m-official-page&bizName=main-app-h5-home — 200 — 228 B — 345 ms — http/1.1https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818674819&deviceResolution=721x1440.25&screen=412x823&event=performance&timeData=%5B%7B%22name%22%3A%22loadEventEnd%22%2C%22duration%22%3A3996%7D%5D&pageTag=m-official-page&bizName=main-app-h5-homewlog.kuaishou.com/rest/n/log/web/co... https://wlog.kuaishou.com/rest/n/log/web/collect?referer=&did=web_c19abe2f0332825e49e2bbdf58f06944&url=https%3A%2F%2Fm.kuaishou.com%2F&ts=1776818674819&deviceResolution=721x1440.25&screen=412x823&event=performance&timeData=%5B%7B%22name%22%3A%22loadEventEnd%22%2C%22duration%22%3A3996%7D%5D&pageTag=m-official-page&bizName=main-app-h5-home — 200 — 228 B — 378 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 492ms · 267KB · ¥24/mo
m.kuaishou.com
Other
Optional
Execution 172ms
Transfer 12 KB
Monthly Cost ¥8/mo
Unattributable
Other
Optional
Execution 131ms
Transfer 0 KB
Monthly Cost ¥6/mo
s1-11674.kwimgs.com
Other
Optional
Execution 108ms
Transfer 2 KB
Monthly Cost ¥5/mo
s1-11674.kwimgs.com
Other
Optional
Execution 81ms
Transfer 253 KB
Unused 87%
Monthly Cost ¥4/mo

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

87% of s1-11674.kwimgs.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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