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https://calameo.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
67
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
67
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
82
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.
75
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.

2.35 s

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

2.53 s

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

126 ms

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

0.016

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

4.38 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.

4.53 s

Page Load Progression

579 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.0 s
4.6 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
14.5 MB transferred, 67 requests
FIX
14.5 MB transferred, 67 requests
Critical::
Page weighs 19.0 MB (14.5 MB transferred)
Warning::
Images are 12.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 12.8 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
CSS is 236 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 236 KB
Info::
67 HTTP requests
Info::
Estimated 3.1 g CO2 per page load
14.5 MB / 2.4 MB budget
14.5 MB transferred
67 requests
3.1 g CO2 per page load
Images 12.8 MiB 88%
JavaScript 1.3 MiB 9%
CSS 236.3 KiB 2%
Fonts 88.7 KiB 1%
Other 79.9 KiB 1%
HTML 6.5 KiB 0%
Other 2.0 KiB 0%
Other 1.4 KiB 0%
Other 428 B 0%
Other 0 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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 (14.5 MiB of 14.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
13 scripts, 578 KB unused
FIX
13 scripts, 578 KB unused
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p...: 174 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://v.calameo.com/9555-000183/pinwheel/viewer/...: 96 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-D69J...: 66 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-H0TZ...: 61 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/Framework/IAB/consen...: 57 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 578 KB
578 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/scripts/common.js250 KB174 KB (70%)✓3rd
https://v.calameo.com/9555-000183/pinwheel/viewer/scripts/modules/desktop/viewer-desktop.js157 KB96 KB (61%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-D69JB0G8CC178 KB66 KB (37%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-H0TZZDDBNK153 KB61 KB (40%)✓3rd
https://consent.cookiebot.com/Framework/IAB/consent-sdk-2.3.js88 KB57 KB (65%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-948455844&cx=c&gtm=4e64h1141 KB54 KB (39%)✓3rd
https://v.calameo.com/9555-000183/pinwheel/viewer/scripts/loader.js113 KB50 KB (45%)✓3rd
https://static.gimii.fr/sdk-2.9.0.js33 KB20 KB (60%)✓3rd
https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/scripts/modules/home/view.js6 KB—✓3rd
https://consent.cookiebot.com/uc.js36 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

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
67 resources · 14.5 MB · 578 KB savings available
FIX
67 resources · 14.5 MB · 578 KB savings available
Warning::
Page weight 13.5 MB over 1MB target
Got: 14.5 MB Expected: ≤ 1 MB
Info::
~578 KB of savings available
Warning::
66 third-party resources (100% of weight)
Info::
7 resources over 200KB
67 resources · 14.5 MiB · 66 third-party 13.5 MiB over 1MB target
Image 88% · 12.9 MiB
JavaScript 9% · 1.3 MiB
CSS 2% · 236.3 KiB
Font 1% · 88.7 KiB
Other 0% · 50.9 KiB
Document 0% · 6.5 KiB

~578.1 KiB of savings available

Remove unused JavaScript: 578.1 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
31 images, 0 KB saveable
REVIEW
31 images, 0 KB saveable
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
31 images 12.8 MB
0 oversized -0 KB
27 legacy format
18 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

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

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 Execution Cost
Action
1627ms total JS execution
REVIEW
1627ms total JS execution
Warning::
https://v.calameo.com/9555-000183/pinwheel/viewer/...: 312ms CPU time
Warning::
Unattributable: 288ms CPU time
Info::
https://v.calameo.com/9555-000183/pinwheel/viewer/...: 221ms CPU time
Info::
https://s.calameoassets.com/pinwheel/9555-2e9f2c/p...: 183ms CPU time
Info::
https://www.calameo.com/: 171ms CPU time
Warning::
Third-party scripts: 1627ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 20% Style & Layout 14% Script Parsing & Compilation 10% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://v.calameo.com/9555-000183/pinwheel/viewer/scripts/modules/desktop/viewer-desktop.js312ms186ms20ms3rd
Unattributable288ms8ms0ms3rd
https://v.calameo.com/9555-000183/pinwheel/viewer/scripts/loader.js221ms134ms13ms3rd
https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/scripts/common.js183ms125ms36ms3rd
https://www.calameo.com/171ms30ms1ms3rd
https://consent.cookiebot.com/2372292c-680d-47b7-90f2-1af22359ed6d/cc.js?renew=false&referer=www.calameo.com&dnt=false&init=false&framework=TCFv2.3124ms94ms30ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-948455844&cx=c&gtm=4e64h188ms73ms14ms3rd
https://www.googletagmanager.com/gtag/js?id=G-H0TZZDDBNK69ms53ms15ms3rd
https://v.calameo.com/?bkcode=0000000010f1121d00e9e&mode=mini&wmode=transparent&page=661ms0ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-D69JB0G8CC59ms37ms20ms3rd

Showing top 10 of 11 scripts

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
4 fonts (89 KB)
PASS
4 fonts (89 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

89 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.3 s LCP 2.5 sdata:font/woff2;base64,d09GMgABAAAAAF8gABAAAAABB+QAAF69AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoFQG4GyQhzV…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAF8gABAAAAABB+QAAF69AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoFQG4GyQhzV… — 23.8 KiB — 97 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAFyMABAAAAABBwgAAFwpAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoFQG4GyGBzV…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAFyMABAAAAABBwgAAFwpAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoFQG4GyGBzV… — 23.1 KiB — 100 ms — font-display: swapdata:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAGsoAAsAAAAAs4AAAQAAAAAAAAAAAAAAAAAAA…x-font-woff;charset=utf... data:application/x-font-woff;charset=utf-8;base64,d09GRgABAAAAAGsoAAsAAAAAs4AAAQAAAAAAAAAAAAAAAAAAA… — 26.8 KiB — 104 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAADvwABIAAAAAi0gAADuNAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGmQbmUAcg0oG…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAADvwABIAAAAAi0gAADuNAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGmQbmUAcg0oG… — 15.0 KiB — 75 ms — font-display: swap
woff2;base64,d09GMgABAA... woff2 swap
Size 24 KB
Load time 97 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 23 KB
Load time 100 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
x-font-woff;charset=utf... woff swap
Size 27 KB
Load time 104 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
woff2;base64,d09GMgABAA... woff2 swap
Size 15 KB
Load time 75 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
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 ~8 KB and ~16 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
Network Waterfall
67 requests over 4395ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.3 s LCP 2.5 shttps://calameo.com// https://calameo.com/ — 302 — 175 B — 1.0 s — http/1.1https://www.calameo.com/www.calameo.com/ https://www.calameo.com/ — 200 — 4.8 KiB — 793 ms — http/1.1https://consent.cookiebot.com/uc.jsconsent.cookiebot.com/uc.js https://consent.cookiebot.com/uc.js — 200 — 35.7 KiB — 41 ms — h2https://static.gimii.fr/gimii.jsstatic.gimii.fr/gimii.js https://static.gimii.fr/gimii.js — 200 — 2.1 KiB — 38 ms — h2https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/css/main.csss.calameoassets.com/pinwheel/9555-2... https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/css/main.css — 200 — 180.1 KiB — 159 ms — h2https://s.calameoassets.com/pinwheel/9555-2e9f2c/vendor/build/lightslider/css/lightslider.min.csss.calameoassets.com/pinwheel/9555-2... https://s.calameoassets.com/pinwheel/9555-2e9f2c/vendor/build/lightslider/css/lightslider.min.css — 200 — 1.5 KiB — 159 ms — h2https://www.googletagmanager.com/gtag/js?id=G-D69JB0G8CCwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-D69JB0G8CC — 200 — 178.4 KiB — 39 ms — h2https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/img/favicon/manifest.jsons.calameoassets.com/pinwheel/9555-2... https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/img/favicon/manifest.json — 200 — 428 B — 119 ms — h2https://consentcdn.cookiebot.com/consentconfig/2372292c-680d-47b7-90f2-1af22359ed6d/settings.jsonconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/2372292c-680d-47b7-90f2-1af22359ed6d/settings.json — 200 — 969 B — 15 ms — h2https://api.gimii.fr/servicesapi.gimii.fr/services https://api.gimii.fr/services — 200 — 744 B — 24 ms — h3https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/scripts/common.jss.calameoassets.com/pinwheel/9555-2... https://s.calameoassets.com/pinwheel/9555-2e9f2c/platform/scripts/common.js — 200 — 249.9 KiB — 102 ms — h2https://consent.cookiebot.com/Framework/IAB/consent-sdk-2.3.jsconsent.cookiebot.com/Framework/IAB... https://consent.cookiebot.com/Framework/IAB/consent-sdk-2.3.js — 200 — 87.9 KiB — 23 ms — h2https://consent.cookiebot.com/2372292c-680d-47b7-90f2-1af22359ed6d/cc.js?renew=false&referer=www.calameo.com&dnt=false&init=false&framework=TCFv2.3consent.cookiebot.com/2372292c-680d... https://consent.cookiebot.com/2372292c-680d-47b7-90f2-1af22359ed6d/cc.js?renew=false&referer=www.calameo.com&dnt=false&init=false&framework=TCFv2.3 — 200 — 186.8 KiB — 502 ms — h2https://static.gimii.fr/sdk-2.9.0.jsstatic.gimii.fr/sdk-2.9.0.js https://static.gimii.fr/sdk-2.9.0.js — 200 — 33.5 KiB — 32 ms — h2data:font/woff2;base64,d09GMgABAAAAAF8gABAAAAABB+QAAF69AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoFQG4GyQhzV…data:font/woff2;base64,d09GMgABAAAA... data:font/woff2;base64,d09GMgABAAAAAF8gABAAAAABB+QAAF69AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoFQG4GyQhzV… — 200 — 23.8 KiB — 97 ms — 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h2https://ps.calameoassets.com/250203150820-a410eb96c7a9a43937376acaa2cca7fa/p9.svgz?_token_=exp=1776842871~acl=%2F250203150820-a410eb96c7a9a43937376acaa2cca7fa%2F%2A~hmac=8f55ece3b97f7b0d7c575e6e65e0224f42ce1908370d377249c4bf20ea3ad2ecps.calameoassets.com/250203150820-a... https://ps.calameoassets.com/250203150820-a410eb96c7a9a43937376acaa2cca7fa/p9.svgz?_token_=exp=1776842871~acl=%2F250203150820-a410eb96c7a9a43937376acaa2cca7fa%2F%2A~hmac=8f55ece3b97f7b0d7c575e6e65e0224f42ce1908370d377249c4bf20ea3ad2ec — 200 — 87.3 KiB — 124 ms — h2https://ps.calameoassets.com/250203150820-a410eb96c7a9a43937376acaa2cca7fa/p10.svgz?_token_=exp=1776842871~acl=%2F250203150820-a410eb96c7a9a43937376acaa2cca7fa%2F%2A~hmac=8f55ece3b97f7b0d7c575e6e65e0224f42ce1908370d377249c4bf20ea3ad2ecps.calameoassets.com/250203150820-a... https://ps.calameoassets.com/250203150820-a410eb96c7a9a43937376acaa2cca7fa/p10.svgz?_token_=exp=1776842871~acl=%2F250203150820-a410eb96c7a9a43937376acaa2cca7fa%2F%2A~hmac=8f55ece3b97f7b0d7c575e6e65e0224f42ce1908370d377249c4bf20ea3ad2ec — 200 — 102.1 KiB — 59 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 1627ms · 1219KB · €18/mo
v.calameo.com
Other
Costly
Execution 312ms
Transfer 157 KB
Unused 61%
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 288ms
Transfer 0 KB
Monthly Cost €3/mo
v.calameo.com
Other
Costly
Execution 221ms
Transfer 113 KB
Unused 45%
Monthly Cost €2/mo
s.calameoassets.com
Other
Optional
Execution 183ms
Transfer 250 KB
Unused 70%
Monthly Cost €2/mo
www.calameo.com
Other
Optional
Execution 171ms
Transfer 5 KB
Monthly Cost €2/mo
consent.cookiebot.com
Other
Optional
Execution 124ms
Transfer 187 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 88ms
Transfer 141 KB
Unused 39%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 69ms
Transfer 153 KB
Unused 40%
Monthly Cost €1/mo
v.calameo.com
Other
Optional
Execution 61ms
Transfer 1 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 59ms
Transfer 178 KB
Unused 37%
Monthly Cost €1/mo
consent.cookiebot.com
Other
Optional
Execution 51ms
Transfer 36 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • v.calameo.com adds 312ms and costs ~€3/month
  • Unattributable adds 288ms and costs ~€3/month
  • v.calameo.com adds 221ms and costs ~€2/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

v.calameo.com takes 312ms 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

61% of v.calameo.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

Unattributable takes 288ms 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

v.calameo.com takes 221ms 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

70% of s.calameoassets.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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