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https://xunlei.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
47
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
65
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.
92
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.

8.37 s

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

16.80 s

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

405 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.

8.37 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.

17.06 s

Page Load Progression

412 ms
824 ms
1.2 s
1.6 s
2.1 s
2.5 s
2.9 s
3.3 s
Checks
17
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
2.6 MB transferred, 46 requests
FIX
2.6 MB transferred, 46 requests
Warning::
Page weighs 3.9 MB (2.6 MB transferred)
Warning::
Images are 1.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.6 MB
Warning::
JavaScript is 781 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 781 KB
Info::
46 HTTP requests
Info::
Estimated 0.54 g CO2 per page load
2.6 MB / 2.4 MB budget
2.6 MB transferred
46 requests
0.54 g CO2 per page load
Images 1.6 MiB 63%
JavaScript 781.2 KiB 30%
Fonts 125.3 KiB 5%
CSS 47.6 KiB 2%
HTML 13.0 KiB 0%
Other 2.2 KiB 0%
Other 861 B 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 (2.6 MiB of 2.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2229ms total JS execution
FIX
2229ms total JS execution
Warning::
Unattributable: 599ms CPU time
Warning::
https://m.xunlei.com/m/: 592ms CPU time
Warning::
https://m.xunlei.com/js/app.8471c94b.js: 529ms CPU time
Warning::
https://m.xunlei.com/js/vendor.7fe0b994.js: 259ms CPU time
Info::
https://m.xunlei.com/js/chunk-common.18ae7111.js: 138ms CPU time
Warning::
Third-party scripts: 2229ms (100% of total)

Main Thread Breakdown

Other 35% Script Evaluation 27% Style & Layout 21% Script Parsing & Compilation 11% Rendering 4%
ScriptTotalScriptingParse/CompileParty
Unattributable599ms25ms0ms3rd
https://m.xunlei.com/m/592ms11ms1ms3rd
https://m.xunlei.com/js/app.8471c94b.js529ms459ms3ms3rd
https://m.xunlei.com/js/vendor.7fe0b994.js259ms27ms82ms3rd
https://m.xunlei.com/js/chunk-common.18ae7111.js138ms1ms136ms3rd
https://hm.baidu.com/hm.js?fc3993ee6315a64049f3b26b7073a986112ms86ms15ms3rd
F
JS Bundles
Action
6 scripts, 516 KB unused
FIX
6 scripts, 516 KB unused
Warning::
https://m.xunlei.com/js/chunk-common.18ae7111.js: 418 KB unused (94%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://m.xunlei.com/js/vendor.7fe0b994.js: 98 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 516 KB
516 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://m.xunlei.com/js/chunk-common.18ae7111.js578 KB418 KB (94%)✓3rd
https://m.xunlei.com/js/vendor.7fe0b994.js167 KB98 KB (59%)✓3rd
https://hm.baidu.com/hm.js?fc3993ee6315a64049f3b26b7073a98612 KB—✓3rd
https://m.xunlei.com/fetch.js3 KB—✓3rd
https://m.xunlei.com/js/2.0fc209f6.js18 KB—✓3rd
https://m.xunlei.com/js/app.8471c94b.js4 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

F
Page Weight Inventory
Action
46 resources · 2.6 MB · 516 KB savings available
FIX
46 resources · 2.6 MB · 516 KB savings available
Warning::
Page weight 1.6 MB over 1MB target
Got: 2.6 MB Expected: ≤ 1 MB
Info::
~516 KB of savings available
Warning::
45 third-party resources (100% of weight)
Info::
4 resources over 200KB
46 resources · 2.6 MiB · 45 third-party 1.6 MiB over 1MB target
Image 63% · 1.6 MiB
JavaScript 30% · 781.2 KiB
Font 5% · 125.3 KiB
CSS 2% · 47.6 KiB
Document 1% · 13.4 KiB
Other 0% · 861 B

~516.5 KiB of savings available

Remove unused JavaScript: 516.5 KiB
B
Image Optimization
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Warning::
https://m.xunlei.com/main/m-banner.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
27 images 1.6 MB
0 oversized -0 KB
24 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

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 (125 KB)
PASS
1 fonts (125 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

125 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 8.4 s LCP 16.8 shttps://m.xunlei.com/fonts/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.d0831fe6.woff2flUhRq6tzZclQEJ-Vdg-Iui... https://m.xunlei.com/fonts/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.d0831fe6.woff2 — 125.3 KiB — 53 ms — font-display: swap
flUhRq6tzZclQEJ-Vdg-Iui... woff2 swap
Size 125 KB
Load time 53 ms
Start 2.7 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~63 KB and ~126 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+
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
A
HTTP Caching
max-age=86400 (1 day)
PASS
max-age=86400 (1 day)
Info::
Cache-Control header is set
Got: max-age=86400
Info::
Effective TTL: 1 day (max-age=86400)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=86400

DirectiveValueMeaning
max-age86400Cache for 1 day
Effective TTL: 86400 seconds
Network Waterfall
46 requests over 3504ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 8.4 s LCP 16.8 shttps://xunlei.com// https://xunlei.com/ — 301 — 130 B — 460 ms — h2https://www.xunlei.com/www.xunlei.com/ https://www.xunlei.com/ — 302 — 291 B — 1.7 s — http/1.1https://m.xunlei.com/m/m.xunlei.com/m/ https://m.xunlei.com/m/ — 200 — 13.0 KiB — 179 ms — http/1.1https://hm.baidu.com/hm.js?fc3993ee6315a64049f3b26b7073a986hm.baidu.com/hm.js?fc3993ee6315a640... https://hm.baidu.com/hm.js?fc3993ee6315a64049f3b26b7073a986 — 200 — 11.6 KiB — 614 ms — http/1.1https://m.xunlei.com/fetch.jsm.xunlei.com/fetch.js https://m.xunlei.com/fetch.js — 200 — 3.0 KiB — 68 ms — http/1.1https://m.xunlei.com/css/vendor.6a81cf17.cssm.xunlei.com/css/vendor.6a81cf17.cs... https://m.xunlei.com/css/vendor.6a81cf17.css — 200 — 38.1 KiB — 19 ms — http/1.1https://m.xunlei.com/css/app.5bdbb1d9.cssm.xunlei.com/css/app.5bdbb1d9.css https://m.xunlei.com/css/app.5bdbb1d9.css — 200 — 1.5 KiB — 14 ms — http/1.1https://m.xunlei.com/css/chunk-common.35738933.cssm.xunlei.com/css/chunk-common.35738... https://m.xunlei.com/css/chunk-common.35738933.css — 200 — 5.6 KiB — 19 ms — http/1.1https://m.xunlei.com/js/chunk-common.18ae7111.jsm.xunlei.com/js/chunk-common.18ae71... https://m.xunlei.com/js/chunk-common.18ae7111.js — 200 — 577.5 KiB — 70 ms — http/1.1https://m.xunlei.com/css/2.8e809375.cssm.xunlei.com/css/2.8e809375.css https://m.xunlei.com/css/2.8e809375.css — 200 — 2.4 KiB — 19 ms — http/1.1https://m.xunlei.com/js/2.0fc209f6.jsm.xunlei.com/js/2.0fc209f6.js https://m.xunlei.com/js/2.0fc209f6.js — 200 — 17.8 KiB — 32 ms — http/1.1https://m.xunlei.com/icons/menu.svgm.xunlei.com/icons/menu.svg https://m.xunlei.com/icons/menu.svg — 200 — 887 B — 16 ms — http/1.1https://m.xunlei.com/icons/logo.svgm.xunlei.com/icons/logo.svg https://m.xunlei.com/icons/logo.svg — 200 — 3.2 KiB — 11 ms — http/1.1https://m.xunlei.com/main/m-banner.pngm.xunlei.com/main/m-banner.png https://m.xunlei.com/main/m-banner.png — 200 — 324.5 KiB — 38 ms — http/1.1https://m.xunlei.com/icons/xunleihuiyuan.svgm.xunlei.com/icons/xunleihuiyuan.sv... https://m.xunlei.com/icons/xunleihuiyuan.svg — 200 — 2.6 KiB — 8 ms — http/1.1https://m.xunlei.com/js/vendor.7fe0b994.jsm.xunlei.com/js/vendor.7fe0b994.js https://m.xunlei.com/js/vendor.7fe0b994.js — 200 — 167.2 KiB — 26 ms — http/1.1https://m.xunlei.com/js/app.8471c94b.jsm.xunlei.com/js/app.8471c94b.js https://m.xunlei.com/js/app.8471c94b.js — 200 — 4.0 KiB — 13 ms — http/1.1https://m.xunlei.com/site.webmanifestm.xunlei.com/site.webmanifest https://m.xunlei.com/site.webmanifest — 200 — 861 B — 24 ms — http/1.1https://m.xunlei.com/icons/xunleiyingyin-new.pngm.xunlei.com/icons/xunleiyingyin-ne... https://m.xunlei.com/icons/xunleiyingyin-new.png — 200 — 43.3 KiB — 21 ms — http/1.1https://m.xunlei.com/icons/xl-browser-new.pngm.xunlei.com/icons/xl-browser-new.p... https://m.xunlei.com/icons/xl-browser-new.png — 200 — 4.6 KiB — 39 ms — http/1.1https://m.xunlei.com/icons/xl-speed.pngm.xunlei.com/icons/xl-speed.png https://m.xunlei.com/icons/xl-speed.png — 200 — 29.4 KiB — 20 ms — http/1.1https://m.xunlei.com/icons/xunleiyouxi.pngm.xunlei.com/icons/xunleiyouxi.png https://m.xunlei.com/icons/xunleiyouxi.png — 200 — 39.5 KiB — 21 ms — http/1.1https://m.xunlei.com/main/b4.pngm.xunlei.com/main/b4.png https://m.xunlei.com/main/b4.png — 200 — 339.6 KiB — 66 ms — http/1.1data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA… — 200 — 0 B — 0 ms — datahttps://m.xunlei.com/icons/x-b-product-right.svgm.xunlei.com/icons/x-b-product-righ... https://m.xunlei.com/icons/x-b-product-right.svg — 200 — 804 B — 15 ms — http/1.1https://m.xunlei.com/main/b1.pngm.xunlei.com/main/b1.png https://m.xunlei.com/main/b1.png — 200 — 149.7 KiB — 21 ms — http/1.1https://m.xunlei.com/img/m-link1.170cf89f.pngm.xunlei.com/img/m-link1.170cf89f.p... https://m.xunlei.com/img/m-link1.170cf89f.png — 200 — 24.4 KiB — 21 ms — http/1.1
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 8.4 s LCP 16.8 shttps://xunlei.com// https://xunlei.com/ — 301 — 130 B — 460 ms — h2https://www.xunlei.com/www.xunlei.com/ https://www.xunlei.com/ — 302 — 291 B — 1.7 s — http/1.1https://m.xunlei.com/m/m.xunlei.com/m/ https://m.xunlei.com/m/ — 200 — 13.0 KiB — 179 ms — http/1.1https://hm.baidu.com/hm.js?fc3993ee6315a64049f3b26b7073a986hm.baidu.com/hm.js?fc3993ee6315a640... https://hm.baidu.com/hm.js?fc3993ee6315a64049f3b26b7073a986 — 200 — 11.6 KiB — 614 ms — http/1.1https://m.xunlei.com/fetch.jsm.xunlei.com/fetch.js https://m.xunlei.com/fetch.js — 200 — 3.0 KiB — 68 ms — http/1.1https://m.xunlei.com/css/vendor.6a81cf17.cssm.xunlei.com/css/vendor.6a81cf17.cs... https://m.xunlei.com/css/vendor.6a81cf17.css — 200 — 38.1 KiB — 19 ms — http/1.1https://m.xunlei.com/css/app.5bdbb1d9.cssm.xunlei.com/css/app.5bdbb1d9.css https://m.xunlei.com/css/app.5bdbb1d9.css — 200 — 1.5 KiB — 14 ms — http/1.1https://m.xunlei.com/css/chunk-common.35738933.cssm.xunlei.com/css/chunk-common.35738... https://m.xunlei.com/css/chunk-common.35738933.css — 200 — 5.6 KiB — 19 ms — http/1.1https://m.xunlei.com/js/chunk-common.18ae7111.jsm.xunlei.com/js/chunk-common.18ae71... https://m.xunlei.com/js/chunk-common.18ae7111.js — 200 — 577.5 KiB — 70 ms — http/1.1https://m.xunlei.com/css/2.8e809375.cssm.xunlei.com/css/2.8e809375.css https://m.xunlei.com/css/2.8e809375.css — 200 — 2.4 KiB — 19 ms — http/1.1https://m.xunlei.com/js/2.0fc209f6.jsm.xunlei.com/js/2.0fc209f6.js https://m.xunlei.com/js/2.0fc209f6.js — 200 — 17.8 KiB — 32 ms — http/1.1https://m.xunlei.com/icons/menu.svgm.xunlei.com/icons/menu.svg https://m.xunlei.com/icons/menu.svg — 200 — 887 B — 16 ms — http/1.1https://m.xunlei.com/icons/logo.svgm.xunlei.com/icons/logo.svg https://m.xunlei.com/icons/logo.svg — 200 — 3.2 KiB — 11 ms — http/1.1https://m.xunlei.com/main/m-banner.pngm.xunlei.com/main/m-banner.png https://m.xunlei.com/main/m-banner.png — 200 — 324.5 KiB — 38 ms — http/1.1https://m.xunlei.com/icons/xunleihuiyuan.svgm.xunlei.com/icons/xunleihuiyuan.sv... https://m.xunlei.com/icons/xunleihuiyuan.svg — 200 — 2.6 KiB — 8 ms — http/1.1https://m.xunlei.com/js/vendor.7fe0b994.jsm.xunlei.com/js/vendor.7fe0b994.js https://m.xunlei.com/js/vendor.7fe0b994.js — 200 — 167.2 KiB — 26 ms — http/1.1https://m.xunlei.com/js/app.8471c94b.jsm.xunlei.com/js/app.8471c94b.js https://m.xunlei.com/js/app.8471c94b.js — 200 — 4.0 KiB — 13 ms — http/1.1https://m.xunlei.com/site.webmanifestm.xunlei.com/site.webmanifest https://m.xunlei.com/site.webmanifest — 200 — 861 B — 24 ms — http/1.1https://m.xunlei.com/icons/xunleiyingyin-new.pngm.xunlei.com/icons/xunleiyingyin-ne... https://m.xunlei.com/icons/xunleiyingyin-new.png — 200 — 43.3 KiB — 21 ms — http/1.1https://m.xunlei.com/icons/xl-browser-new.pngm.xunlei.com/icons/xl-browser-new.p... https://m.xunlei.com/icons/xl-browser-new.png — 200 — 4.6 KiB — 39 ms — http/1.1https://m.xunlei.com/icons/xl-speed.pngm.xunlei.com/icons/xl-speed.png https://m.xunlei.com/icons/xl-speed.png — 200 — 29.4 KiB — 20 ms — http/1.1https://m.xunlei.com/icons/xunleiyouxi.pngm.xunlei.com/icons/xunleiyouxi.png https://m.xunlei.com/icons/xunleiyouxi.png — 200 — 39.5 KiB — 21 ms — http/1.1https://m.xunlei.com/main/b4.pngm.xunlei.com/main/b4.png https://m.xunlei.com/main/b4.png — 200 — 339.6 KiB — 66 ms — http/1.1data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEgAAABICAYAAABV7bNHAAAACXBIWXMAACE4AAAhOAFFljFgAAAAA… — 200 — 0 B — 0 ms — 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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 2229ms · 773KB · ¥110/mo
Unattributable
Other
Costly
Execution 599ms
Transfer 0 KB
Monthly Cost ¥30/mo
m.xunlei.com
Other
Costly
Execution 592ms
Transfer 13 KB
Monthly Cost ¥29/mo
m.xunlei.com
Other
Costly
Execution 529ms
Transfer 4 KB
Monthly Cost ¥26/mo
m.xunlei.com
Other
Costly
Execution 259ms
Transfer 167 KB
Unused 59%
Monthly Cost ¥13/mo
m.xunlei.com
Other
Optional
Execution 138ms
Transfer 578 KB
Unused 94%
Monthly Cost ¥7/mo
hm.baidu.com
Other
Optional
Execution 112ms
Transfer 12 KB
Monthly Cost ¥6/mo

These scripts may cost more than they're worth

  • Unattributable adds 599ms and costs ~¥30/month
  • m.xunlei.com adds 592ms and costs ~¥29/month
  • m.xunlei.com adds 529ms and costs ~¥26/month
  • m.xunlei.com adds 259ms 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

Unattributable takes 599ms 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

m.xunlei.com takes 592ms 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

m.xunlei.com takes 529ms 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

m.xunlei.com takes 259ms 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

59% of m.xunlei.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

94% of m.xunlei.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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