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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
30
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.

3.63 s

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

10.50 s

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

1.14 s

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

0.149

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

8.64 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.

15.02 s

Page Load Progression

592 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.6 s
4.1 s
4.7 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
17.0 MB transferred, 88 requests
FIX
17.0 MB transferred, 88 requests
Critical::
Page weighs 18.6 MB (17.0 MB transferred)
Warning::
JavaScript is 799 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 799 KB
Info::
Fonts are 701 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 701 KB
Info::
88 HTTP requests
Info::
Estimated 3.6 g CO2 per page load
17.0 MB / 2.4 MB budget
17.0 MB transferred
88 requests
3.6 g CO2 per page load
Other 15.0 MiB 88%
JavaScript 799.2 KiB 5%
Fonts 700.8 KiB 4%
Images 318.7 KiB 2%
Other 218.3 KiB 1%
HTML 28.4 KiB 0%
Other 5.7 KiB 0%
CSS 3.0 KiB 0%
Other 1.4 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (17.0 MiB of 17.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5473ms total JS execution
FIX
5473ms total JS execution
Warning::
https://cdn.rgpub.io/public/live/riotbar/latest/lo...: 920ms CPU time
Warning::
https://cmp.osano.com/16BZ95S4qp9Kl2gUA/c84de61e-2...: 861ms CPU time
Warning::
Unattributable: 821ms CPU time
Warning::
https://www.leagueoflegends.com/_next/static/chunk...: 717ms CPU time
Warning::
https://www.leagueoflegends.com/es-es/: 710ms CPU time
Warning::
Third-party scripts: 5473ms (100% of total)

Main Thread Breakdown

Script Evaluation 58% Other 21% Style & Layout 9% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://cdn.rgpub.io/public/live/riotbar/latest/lol-rso-pbe.es-es.js920ms583ms35ms3rd
https://cmp.osano.com/16BZ95S4qp9Kl2gUA/c84de61e-21d7-4a4a-9591-3d3a28fb5b1d/osano.js861ms639ms113ms3rd
Unattributable821ms78ms0ms3rd
https://www.leagueoflegends.com/_next/static/chunks/framework-d5fbdf5171596063.js717ms640ms17ms3rd
https://www.leagueoflegends.com/es-es/710ms177ms3ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N98J546ms386ms75ms3rd
https://www.leagueoflegends.com/_next/static/chunks/400-2ccb8cfe6c021e58.js352ms197ms89ms3rd
https://www.leagueoflegends.com/_next/static/chunks/pages/%5B%5B...pathArray%5D%5D-5ab3ec9789779be9.js344ms335ms0ms3rd
https://www.leagueoflegends.com/_next/static/chunks/main-dce482870b005ba1.js122ms88ms34ms3rd
https://cmp.osano.com/16BZ95S4qp9Kl2gUA/c84de61e-21d7-4a4a-9591-3d3a28fb5b1d/osano-ui.js80ms45ms18ms3rd
D
Page Weight Inventory
Action
88 resources · 17.0 MB · 284 KB savings available
FIX
88 resources · 17.0 MB · 284 KB savings available
Warning::
Page weight 16.0 MB over 1MB target
Got: 17.0 MB Expected: ≤ 1 MB
Info::
~284 KB of savings available
Warning::
87 third-party resources (100% of weight)
Info::
4 resources over 200KB
88 resources · 17.0 MiB · 87 third-party 16.0 MiB over 1MB target
Media 88% · 15.0 MiB
JavaScript 6% · 1003.0 KiB
Font 4% · 700.8 KiB
Image 2% · 331.1 KiB
Document 0% · 29.1 KiB
Other 0% · 8.5 KiB
CSS 0% · 3.0 KiB

~284.3 KiB of savings available

Remove unused JavaScript: 284.3 KiB
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
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
https://cmsassets.rgpub.io/sanity/images/dsfx7636/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cmsassets.rgpub.io/sanity/images/dsfx7636/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cmsassets.rgpub.io/sanity/images/dsfx7636/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cmsassets.rgpub.io/sanity/images/dsfx7636/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cmsassets.rgpub.io/sanity/images/dsfx7636/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cmsassets.rgpub.io/sanity/images/dsfx7636/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 319 KB
0 oversized -0 KB
12 legacy format
6 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

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
26 scripts, 284 KB unused
REVIEW
26 scripts, 284 KB unused
Warning::
https://www.leagueoflegends.com/_next/static/chunk...: 169 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N98...: 76 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.rgpub.io/public/live/riotbar/latest/lo...: 40 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 284 KB
284 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.leagueoflegends.com/_next/static/chunks/400-2ccb8cfe6c021e58.js299 KB169 KB (56%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N98J174 KB76 KB (43%)✓3rd
https://cdn.rgpub.io/public/live/riotbar/latest/lol-rso-pbe.es-es.js119 KB40 KB (33%)✓3rd
https://www.leagueoflegends.com/_next/static/VhPZ65gplKDdR2BEl2rIH/_buildManifest.js1 KB—✓3rd
https://www.leagueoflegends.com/_next/static/chunks/framework-d5fbdf5171596063.js43 KB—✓3rd
https://dev.visualwebsiteoptimizer.com/j.php?a=774097&u=https%3A%2F%2Fwww.leagueoflegends.com%2Fes-es%2F&vn=2.1&x=true10 KB—✓3rd
https://www.leagueoflegends.com/_next/static/chunks/pages/_app-8e1ba8c934f22784.js1 KB—✓3rd
https://www.leagueoflegends.com/_next/static/chunks/679-30c0a19c43bc4a4a.js23 KB—✓3rd
https://www.leagueoflegends.com/_next/static/chunks/116-1d5b070cbcaeb011.js5 KB—✓3rd
blob:https://www.leagueoflegends.com/d1e8e487-dd0a-4cf1-9839-cc1cceca159a-0 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

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+
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
8 fonts (701 KB)
PASS
8 fonts (701 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

701 KB total

Render-blocking

0

of 8

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 FCP 3.6 s LCP 10.5 shttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/beaufort/BeaufortforLOL-BoldItalic.woffBeaufortforLOL-BoldItal... https://lolstatic-a.akamaihd.net/webfonts/live/fonts/beaufort/BeaufortforLOL-BoldItalic.woff — 52.2 KiB — 135 ms — font-display: swaphttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/spiegel/Spiegel-Regular.woffSpiegel-Regular.woff https://lolstatic-a.akamaihd.net/webfonts/live/fonts/spiegel/Spiegel-Regular.woff — 78.9 KiB — 139 ms — font-display: swaphttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/spiegel/Spiegel-Bold.woffSpiegel-Bold.woff https://lolstatic-a.akamaihd.net/webfonts/live/fonts/spiegel/Spiegel-Bold.woff — 79.0 KiB — 139 ms — font-display: swaphttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/spiegel/Spiegel-SemiBold.woffSpiegel-SemiBold.woff https://lolstatic-a.akamaihd.net/webfonts/live/fonts/spiegel/Spiegel-SemiBold.woff — 80.5 KiB — 139 ms — font-display: swaphttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-SemiBold.woff2Inter-SemiBold.woff2 https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-SemiBold.woff2 — 104.1 KiB — 9 ms — font-display: swaphttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Bold.woff2Inter-Bold.woff2 https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Bold.woff2 — 104.5 KiB — 13 ms — font-display: swaphttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Regular.woff2Inter-Regular.woff2 https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Regular.woff2 — 97.3 KiB — 11 ms — font-display: swaphttps://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Medium.woff2Inter-Medium.woff2 https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Medium.woff2 — 104.2 KiB — 11 ms — font-display: swap
BeaufortforLOL-BoldItal... woff swap
Size 52 KB
Load time 135 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Spiegel-Regular.woff woff swap
Size 79 KB
Load time 139 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Spiegel-Bold.woff woff swap
Size 79 KB
Load time 139 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Spiegel-SemiBold.woff woff swap
Size 81 KB
Load time 139 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Inter-SemiBold.woff2 woff2 swap
Size 104 KB
Load time 9 ms
Start 2.1 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
Inter-Bold.woff2 woff2 swap
Size 104 KB
Load time 13 ms
Start 2.1 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
Inter-Regular.woff2 woff2 swap
Size 97 KB
Load time 11 ms
Start 2.1 s
Risk FOUT — text flashes from fallback to web font
Inter-Medium.woff2 woff2 swap
Size 104 KB
Load time 11 ms
Start 2.1 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 ~244 KB and ~488 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
1
preload
2
dns-prefetch
—
prefetch
—

3 resource hints configured

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
88 requests over 2542ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.6 s LCP 10.5 shttps://leagueoflegends.com// https://leagueoflegends.com/ — 301 — 142 B — 533 ms — h2https://www.leagueoflegends.com/www.leagueoflegends.com/ https://www.leagueoflegends.com/ — 307 — 145 B — 158 ms — h2https://www.leagueoflegends.com/es-es/www.leagueoflegends.com/es-es/ https://www.leagueoflegends.com/es-es/ — 200 — 24.6 KiB — 272 ms — h2https://cmp.osano.com/16BZ95S4qp9Kl2gUA/c84de61e-21d7-4a4a-9591-3d3a28fb5b1d/osano.jscmp.osano.com/16BZ95S4qp9Kl2gUA/c84... https://cmp.osano.com/16BZ95S4qp9Kl2gUA/c84de61e-21d7-4a4a-9591-3d3a28fb5b1d/osano.js — 200 — 43.7 KiB — 104 ms — h3https://www.leagueoflegends.com/_next/static/css/112495035b880485.csswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/css/112495035b880485.css — 200 — 249 B — 73 ms — h2https://www.leagueoflegends.com/_next/static/css/d22fe4243c447d5f.csswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/css/d22fe4243c447d5f.css — 200 — 884 B — 80 ms — h2https://www.leagueoflegends.com/_next/static/chunks/webpack-f606c46306dbc732.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/webpack-f606c46306dbc732.js — 200 — 1.8 KiB — 35 ms — h2https://www.leagueoflegends.com/_next/static/chunks/framework-d5fbdf5171596063.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/framework-d5fbdf5171596063.js — 200 — 42.7 KiB — 61 ms — h2blob:https://www.leagueoflegends.com/d1e8e487-dd0a-4cf1-9839-cc1cceca159awww.leagueoflegends.com/d1e8e487-dd... blob:https://www.leagueoflegends.com/d1e8e487-dd0a-4cf1-9839-cc1cceca159a — 200 — -1 B — 23 ms — blobhttps://www.leagueoflegends.com/_next/static/chunks/main-dce482870b005ba1.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/main-dce482870b005ba1.js — 200 — 34.7 KiB — 34 ms — h2https://dev.visualwebsiteoptimizer.com/j.php?a=774097&u=https%3A%2F%2Fwww.leagueoflegends.com%2Fes-es%2F&vn=2.1&x=truedev.visualwebsiteoptimizer.com/j.ph... https://dev.visualwebsiteoptimizer.com/j.php?a=774097&u=https%3A%2F%2Fwww.leagueoflegends.com%2Fes-es%2F&vn=2.1&x=true — 200 — 9.9 KiB — 100 ms — h2https://www.leagueoflegends.com/_next/static/chunks/pages/_app-8e1ba8c934f22784.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/pages/_app-8e1ba8c934f22784.js — 200 — 976 B — 35 ms — h2https://www.leagueoflegends.com/_next/static/chunks/679-30c0a19c43bc4a4a.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/679-30c0a19c43bc4a4a.js — 200 — 22.7 KiB — 106 ms — h2https://www.leagueoflegends.com/_next/static/chunks/116-1d5b070cbcaeb011.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/116-1d5b070cbcaeb011.js — 200 — 5.2 KiB — 49 ms — h2https://www.leagueoflegends.com/_next/static/chunks/400-2ccb8cfe6c021e58.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/400-2ccb8cfe6c021e58.js — 200 — 299.4 KiB — 117 ms — h2https://www.leagueoflegends.com/_next/static/chunks/243-338ab835dc72016b.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/243-338ab835dc72016b.js — 200 — 6.6 KiB — 54 ms — h2https://www.leagueoflegends.com/_next/static/chunks/pages/%5B%5B...pathArray%5D%5D-5ab3ec9789779be9.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/chunks/pages/%5B%5B...pathArray%5D%5D-5ab3ec9789779be9.js — 200 — 554 B — 87 ms — h2https://www.leagueoflegends.com/_next/static/VhPZ65gplKDdR2BEl2rIH/_buildManifest.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/VhPZ65gplKDdR2BEl2rIH/_buildManifest.js — 200 — 660 B — 52 ms — h2https://www.leagueoflegends.com/_next/static/VhPZ65gplKDdR2BEl2rIH/_ssgManifest.jswww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/VhPZ65gplKDdR2BEl2rIH/_ssgManifest.js — 200 — 237 B — 87 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-N98Jwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-N98J — 200 — 174.3 KiB — 182 ms — h2https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/common/assets/link.svgwww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/common/assets/link.svg — 200 — 733 B — 95 ms — h2https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/common/assets/link-square.svgwww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/common/assets/link-square.svg — 200 — 837 B — 88 ms — h2https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/common/assets/player-square.svgwww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/common/assets/player-square.svg — 200 — 413 B — 87 ms — h2https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/rg-product-pages/assets/carousel-left.svgwww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/rg-product-pages/assets/carousel-left.svg — 200 — 394 B — 88 ms — h2https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/rg-product-pages/assets/carousel-right.svgwww.leagueoflegends.com/_next/stati... https://www.leagueoflegends.com/_next/static/node_modules/@riot-private/blades-ui/dist/skins/rg-product-pages/assets/carousel-right.svg — 200 — 393 B — 89 ms — 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h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/befd42ad6d2564159a441d08cfc3bf511532eb74-1628x1628.png?accountingTag=LoL&auto=format&fit=fill&q=80&w=637cmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/befd42ad6d2564159a441d08cfc3bf511532eb74-1628x1628.png?accountingTag=LoL&auto=format&fit=fill&q=80&w=637 — 200 — 35.3 KiB — 134 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/a6f94cd5ed222d3b99e535f17cd9592d3c716bb5-3840x1616.png?accountingTag=LoL&auto=format&fit=fill&q=80&h=1050cmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/a6f94cd5ed222d3b99e535f17cd9592d3c716bb5-3840x1616.png?accountingTag=LoL&auto=format&fit=fill&q=80&h=1050 — 200 — 35.7 KiB — 35 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/76c98a7d43d4185e9ce1c9e0cd6f9647fed75acd-1304x1304.png?accountingTag=LoL&auto=format&fit=fill&q=80&w=637cmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/76c98a7d43d4185e9ce1c9e0cd6f9647fed75acd-1304x1304.png?accountingTag=LoL&auto=format&fit=fill&q=80&w=637 — 200 — 39.3 KiB — 138 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/e50f5eb867949248d81b3c4a1dcb3e7d7cf187de-440x440.png?accountingTag=LoL&auto=format&fit=crop&q=80&h=112&w=112&crop=centercmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/e50f5eb867949248d81b3c4a1dcb3e7d7cf187de-440x440.png?accountingTag=LoL&auto=format&fit=crop&q=80&h=112&w=112&crop=center — 200 — 3.5 KiB — 29 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/88a013a106668103aedbceb8f174bd4cbc06568b-440x440.png?accountingTag=LoL&auto=format&fit=crop&q=80&h=112&w=112&crop=centercmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/88a013a106668103aedbceb8f174bd4cbc06568b-440x440.png?accountingTag=LoL&auto=format&fit=crop&q=80&h=112&w=112&crop=center — 200 — 3.6 KiB — 40 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/d1df552539dd70a8ffd38b6e93d1e751fb980ea6-440x440.png?accountingTag=LoL&auto=format&fit=crop&q=80&h=112&w=112&crop=centercmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/d1df552539dd70a8ffd38b6e93d1e751fb980ea6-440x440.png?accountingTag=LoL&auto=format&fit=crop&q=80&h=112&w=112&crop=center — 200 — 2.9 KiB — 31 ms — h2blob:https://www.leagueoflegends.com/a513cb20-6b5f-4515-96b8-d703fec00cefwww.leagueoflegends.com/a513cb20-6b... blob:https://www.leagueoflegends.com/a513cb20-6b5f-4515-96b8-d703fec00cef — 200 — -1 B — 81 ms — blobhttps://cmsassets.rgpub.io/sanity/images/dsfx7636/news/0eb5bc3bbb7794eceea3a5e7948906e1cbcd027f-5120x1810.png?accountingTag=LoL&auto=format&fit=fill&q=80&w=721cmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/0eb5bc3bbb7794eceea3a5e7948906e1cbcd027f-5120x1810.png?accountingTag=LoL&auto=format&fit=fill&q=80&w=721 — 200 — 1.1 KiB — 24 ms — h3https://lolstatic-a.akamaihd.net/webfonts/live/css/riot/fonts.csslolstatic-a.akamaihd.net/webfonts/l... https://lolstatic-a.akamaihd.net/webfonts/live/css/riot/fonts.css — 200 — 1.9 KiB — 11 ms — http/1.1https://xsso.leagueoflegends.com/xssoxsso.leagueoflegends.com/xsso https://xsso.leagueoflegends.com/xsso — 200 — 2.9 KiB — 141 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/d984d8f29c6d2f1e7bc8266033940b0f70a4574e-715x872.png?&h=100&fit=maxcmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/d984d8f29c6d2f1e7bc8266033940b0f70a4574e-715x872.png?&h=100&fit=max — 200 — 4.4 KiB — 16 ms — h3https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/518f350451239148a7d7d7c45ad459ff72b0c6f3-872x872.jpg?&h=100&fit=maxcmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/518f350451239148a7d7d7c45ad459ff72b0c6f3-872x872.jpg?&h=100&fit=max — 200 — 3.7 KiB — 22 ms — h3https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/bf77a611f44b483465a07955eee2046a52688f30-872x872.jpg?&h=100&fit=maxcmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/bf77a611f44b483465a07955eee2046a52688f30-872x872.jpg?&h=100&fit=max — 200 — 3.4 KiB — 22 ms — h3https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/bde9f40d2636c583107d19fb0c7a9f53942f65db-872x872.jpg?&h=100&fit=maxcmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/bde9f40d2636c583107d19fb0c7a9f53942f65db-872x872.jpg?&h=100&fit=max — 200 — 3.7 KiB — 22 ms — h3https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/8c28caecceb2a4f9847212683626dd7a76c98416-872x872.jpg?&h=100&fit=maxcmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/riotbar_live/8c28caecceb2a4f9847212683626dd7a76c98416-872x872.jpg?&h=100&fit=max — 200 — 4.0 KiB — 21 ms — h3https://cdn.rgpub.io/public/live/riotbar/latest/spritemap.svgcdn.rgpub.io/public/live/riotbar/la... https://cdn.rgpub.io/public/live/riotbar/latest/spritemap.svg — 200 — 11.9 KiB — 14 ms — http/1.1https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-SemiBold.woff2lolstatic-a.akamaihd.net/webfonts/l... https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-SemiBold.woff2 — 200 — 104.1 KiB — 9 ms — http/1.1https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Bold.woff2lolstatic-a.akamaihd.net/webfonts/l... https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Bold.woff2 — 200 — 104.5 KiB — 13 ms — http/1.1https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Regular.woff2lolstatic-a.akamaihd.net/webfonts/l... https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Regular.woff2 — 200 — 97.3 KiB — 11 ms — http/1.1https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Medium.woff2lolstatic-a.akamaihd.net/webfonts/l... https://lolstatic-a.akamaihd.net/webfonts/live/fonts/inter/v3/Inter-Medium.woff2 — 200 — 104.2 KiB — 11 ms — http/1.1https://lol.secure.dyn.riotcdn.net/channels/public/x/status/euw1.jsonlol.secure.dyn.riotcdn.net/channels... https://lol.secure.dyn.riotcdn.net/channels/public/x/status/euw1.json — 200 — 1.2 KiB — 90 ms — http/1.1https://cdn.rgpub.io/public/live/riotbar/content-manifests/es_ES.jsoncdn.rgpub.io/public/live/riotbar/co... https://cdn.rgpub.io/public/live/riotbar/content-manifests/es_ES.json — 200 — 4.5 KiB — 7 ms — http/1.1https://www.youtube.com/s/player/1bb6ee63/www-widgetapi.vflset/www-widgetapi.jswww.youtube.com/s/player/1bb6ee63/w... https://www.youtube.com/s/player/1bb6ee63/www-widgetapi.vflset/www-widgetapi.js — 200 — 10.6 KiB — 34 ms — h2https://xsso.leagueoflegends.com/check-session-iframexsso.leagueoflegends.com/check-sess... https://xsso.leagueoflegends.com/check-session-iframe — 200 — 513 B — 26 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/a6f94cd5ed222d3b99e535f17cd9592d3c716bb5-3840x1616.png?accountingTag=LoL&auto=format&fit=fill&q=80&h=1187cmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news/a6f94cd5ed222d3b99e535f17cd9592d3c716bb5-3840x1616.png?accountingTag=LoL&auto=format&fit=fill&q=80&h=1187 — 200 — 41.8 KiB — 37 ms — h3https://auth.riotgames.com/check-session-iframeauth.riotgames.com/check-session-if... https://auth.riotgames.com/check-session-iframe — 403 — 481 B — 109 ms — h2https://xsso.leagueoflegends.com/riot-owned-iframexsso.leagueoflegends.com/riot-owned... https://xsso.leagueoflegends.com/riot-owned-iframe — 200 — 1.4 KiB — 27 ms — h2https://cmsassets.rgpub.io/sanity/images/dsfx7636/news_live/d3b7bd9decb1e1672dcb80be4f8bc1aa05490dc1-110x70.svg?accountingTag=LoLcmsassets.rgpub.io/sanity/images/ds... https://cmsassets.rgpub.io/sanity/images/dsfx7636/news_live/d3b7bd9decb1e1672dcb80be4f8bc1aa05490dc1-110x70.svg?accountingTag=LoL — 200 — 570 B — 8 ms — h3https://xsso.leagueoflegends.com/login?prompt=none&response_type=code&client_id=prod-xsso-leagueoflegends&scope=openid%20account%20email%20offline_accessxsso.leagueoflegends.com/login?prom... https://xsso.leagueoflegends.com/login?prompt=none&response_type=code&client_id=prod-xsso-leagueoflegends&scope=openid%20account%20email%20offline_access — 302 — 545 B — 51 ms — h2https://auth.riotgames.com/authorize?client_id=prod-xsso-leagueoflegends&scope=openid+account+email+offline_access&code_challenge_method=S256&code_challenge=pFL0xl7qFaBFnCpIUWFjigESzrkWvdmm2QFF-sIuqRk&redirect_uri=https%3A%2F%2Fxsso.leagueoflegends.com%2Fredirect&state=da56423241450a9367ed55ecd4&response_type=code&prompt=noneauth.riotgames.com/authorize?client... https://auth.riotgames.com/authorize?client_id=prod-xsso-leagueoflegends&scope=openid+account+email+offline_access&code_challenge_method=S256&code_challenge=pFL0xl7qFaBFnCpIUWFjigESzrkWvdmm2QFF-sIuqRk&redirect_uri=https%3A%2F%2Fxsso.leagueoflegends.com%2Fredirect&state=da56423241450a9367ed55ecd4&response_type=code&prompt=none — 403 — 266 B — 23 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 5473ms · 769KB · €59/mo
cdn.rgpub.io
Other
Costly
Execution 920ms
Transfer 119 KB
Unused 33%
Monthly Cost €10/mo
cmp.osano.com
Other
Costly
Execution 861ms
Transfer 44 KB
Monthly Cost €9/mo
Unattributable
Other
Costly
Execution 821ms
Transfer 0 KB
Monthly Cost €9/mo
www.leagueoflegends.com
Other
Costly
Execution 717ms
Transfer 43 KB
Monthly Cost €8/mo
www.leagueoflegends.com
Other
Costly
Execution 710ms
Transfer 25 KB
Monthly Cost €8/mo
Google Tag Manager
Tag Manager
Costly
Execution 546ms
Transfer 174 KB
Unused 43%
Monthly Cost €6/mo
www.leagueoflegends.com
Other
Costly
Execution 352ms
Transfer 299 KB
Unused 56%
Monthly Cost €4/mo
www.leagueoflegends.com
Other
Costly
Execution 344ms
Transfer 1 KB
Monthly Cost €4/mo
www.leagueoflegends.com
Other
Optional
Execution 122ms
Transfer 35 KB
Monthly Cost €1/mo
cmp.osano.com
Other
Optional
Execution 80ms
Transfer 29 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • cdn.rgpub.io adds 920ms and costs ~€10/month
  • cmp.osano.com adds 861ms and costs ~€9/month
  • Unattributable adds 821ms and costs ~€9/month
  • www.leagueoflegends.com adds 717ms and costs ~€8/month
  • www.leagueoflegends.com adds 710ms and costs ~€8/month
  • Google Tag Manager adds 546ms and costs ~€6/month
  • www.leagueoflegends.com adds 352ms and costs ~€4/month
  • www.leagueoflegends.com adds 344ms and costs ~€4/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

cdn.rgpub.io takes 920ms 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

cmp.osano.com takes 861ms 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 821ms 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

www.leagueoflegends.com takes 717ms 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

www.leagueoflegends.com takes 710ms 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

Google Tag Manager takes 546ms 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

www.leagueoflegends.com takes 352ms 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

56% of www.leagueoflegends.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

www.leagueoflegends.com takes 344ms 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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