Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
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.
14.71 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
699 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.98 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.
15.03 s
Page Load Progression
DPage Weight BudgetAction2.4 MB transferred, 73 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
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.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2782ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 586ms | 26ms | 0ms | 3rd |
| https://www.ohchr.org/en/ohchr_homepage | 563ms | 27ms | 2ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KV9RGBN | 311ms | 267ms | 40ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-380853742&cx=c>m=4e64h1 | 298ms | 252ms | 44ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-N7SFZJCFK3&cx=c>m=4e64h1 | 267ms | 205ms | 39ms | 3rd |
| https://www.ohchr.org/cdn-cgi/challenge-platform/scripts/jsd/main.js | 255ms | 244ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-17844337008&cx=c>m=4e64h1 | 185ms | 150ms | 34ms | 3rd |
| https://www.ohchr.org/sites/default/files/js/js_CCGJF5HYoMrXEozrXpki8ow0UdDvvcoFm1tRewS1hyk.js?scope=footer&delta=3&language=en&theme=ohchr&include=eJxlkFFuhDAMRC-ElyNFJnFDWie2YsOW2xcolcruj6V5Y89ItlKVKajoomFiiV822jsbZI5zH6MZrNgNVNr2UZgvnlkm5GC-MdmQRfJ-75jH7PUuMb_qB37i95VzTkjS0AmqJPwriNgTnPHgT4G10PPw6bIZWyotg2ImwFYqepF2mTNhog7ad9y3O3RRaLj-whCl04iLS5TjA07hELZMtfhwmqkvivz4v3MP3MNKPtt_ACDShhQ | 142ms | 48ms | 4ms | 3rd |
| https://www.ohchr.org/sites/default/files/js/js_9MVjhbMK5llrZyGMi14yu72LpBQbFbttEinrMqoQPfA.js?scope=footer&delta=0&language=en&theme=ohchr&include=eJxlkFFuhDAMRC-ElyNFJnFDWie2YsOW2xcolcruj6V5Y89ItlKVKajoomFiiV822jsbZI5zH6MZrNgNVNr2UZgvnlkm5GC-MdmQRfJ-75jH7PUuMb_qB37i95VzTkjS0AmqJPwriNgTnPHgT4G10PPw6bIZWyotg2ImwFYqepF2mTNhog7ad9y3O3RRaLj-whCl04iLS5TjA07hELZMtfhwmqkvivz4v3MP3MNKPtt_ACDShhQ | 124ms | 90ms | 10ms | 3rd |
| https://www.google-analytics.com/analytics.js | 50ms | 41ms | 4ms | 3rd |
DPage Weight InventoryAction73 resources · 2.4 MB · 248 KB savings availableFIX
~248.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 73 resources | 2.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction35 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CJS BundlesAction14 scripts, 248 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-N7SFZJCFK3&cx=c>m=4e64h1 | 174 KB | 67 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KV9RGBN | 175 KB | 66 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-17844337008&cx=c>m=4e64h1 | 137 KB | 61 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-380853742&cx=c>m=4e64h1 | 145 KB | 55 KB (38%) | ✓ | 3rd |
| https://www.ohchr.org/sites/default/files/js/js_9MVjhbMK5llrZyGMi14yu72LpBQbFbttEinrMqoQPfA.js?scope=footer&delta=0&language=en&theme=ohchr&include=eJxlkFFuhDAMRC-ElyNFJnFDWie2YsOW2xcolcruj6V5Y89ItlKVKajoomFiiV822jsbZI5zH6MZrNgNVNr2UZgvnlkm5GC-MdmQRfJ-75jH7PUuMb_qB37i95VzTkjS0AmqJPwriNgTnPHgT4G10PPw6bIZWyotg2ImwFYqepF2mTNhog7ad9y3O3RRaLj-whCl04iLS5TjA07hELZMtfhwmqkvivz4v3MP3MNKPtt_ACDShhQ | 33 KB | — | ✓ | 3rd |
| https://www.ohchr.org/sites/default/files/js/js_CCGJF5HYoMrXEozrXpki8ow0UdDvvcoFm1tRewS1hyk.js?scope=footer&delta=3&language=en&theme=ohchr&include=eJxlkFFuhDAMRC-ElyNFJnFDWie2YsOW2xcolcruj6V5Y89ItlKVKajoomFiiV822jsbZI5zH6MZrNgNVNr2UZgvnlkm5GC-MdmQRfJ-75jH7PUuMb_qB37i95VzTkjS0AmqJPwriNgTnPHgT4G10PPw6bIZWyotg2ImwFYqepF2mTNhog7ad9y3O3RRaLj-whCl04iLS5TjA07hELZMtfhwmqkvivz4v3MP3MNKPtt_ACDShhQ | 17 KB | — | ✓ | 3rd |
| https://www.ohchr.org/sites/default/files/js/js_Yeh4JDGhza41fWvjr71T9PJ2_zbGA24NY_ATZ8KPQs8.js?scope=footer&delta=4&language=en&theme=ohchr&include=eJxlkFFuhDAMRC-ElyNFJnFDWie2YsOW2xcolcruj6V5Y89ItlKVKajoomFiiV822jsbZI5zH6MZrNgNVNr2UZgvnlkm5GC-MdmQRfJ-75jH7PUuMb_qB37i95VzTkjS0AmqJPwriNgTnPHgT4G10PPw6bIZWyotg2ImwFYqepF2mTNhog7ad9y3O3RRaLj-whCl04iLS5TjA07hELZMtfhwmqkvivz4v3MP3MNKPtt_ACDShhQ | 5 KB | — | ✓ | 3rd |
| https://www.ohchr.org/sites/default/files/js/js_qoRIMKYJmF8YNe1XSJSjTA9YHKYBFAbPkT6kkvCa-9E.js?scope=footer&delta=1&language=en&theme=ohchr&include=eJxlkFFuhDAMRC-ElyNFJnFDWie2YsOW2xcolcruj6V5Y89ItlKVKajoomFiiV822jsbZI5zH6MZrNgNVNr2UZgvnlkm5GC-MdmQRfJ-75jH7PUuMb_qB37i95VzTkjS0AmqJPwriNgTnPHgT4G10PPw6bIZWyotg2ImwFYqepF2mTNhog7ad9y3O3RRaLj-whCl04iLS5TjA07hELZMtfhwmqkvivz4v3MP3MNKPtt_ACDShhQ | 24 KB | — | ✓ | 3rd |
| https://www.ohchr.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js? | 14 KB | — | ✓ | 3rd |
| https://www.ohchr.org/sites/default/files/js/js_IGwe3_8pPKLkzwRM4eQfak_zWB9H-WcQwzoh4WXh0KY.js?scope=header&delta=0&language=en&theme=ohchr&include=eJxlkFFuhDAMRC-ElyNFJnFDWie2YsOW2xcolcruj6V5Y89ItlKVKajoomFiiV822jsbZI5zH6MZrNgNVNr2UZgvnlkm5GC-MdmQRfJ-75jH7PUuMb_qB37i95VzTkjS0AmqJPwriNgTnPHgT4G10PPw6bIZWyotg2ImwFYqepF2mTNhog7ad9y3O3RRaLj-whCl04iLS5TjA07hELZMtfhwmqkvivz4v3MP3MNKPtt_ACDShhQ | 0 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (71 KB)PASS
Web fonts
4
71 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall73 requests over 1129msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 586ms | 0 KB | — | €6/mo | Costly |
www.ohchr.org www.ohchr.org | Other | 563ms | 17 KB | — | €6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 311ms | 175 KB | 38% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 298ms | 145 KB | 38% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 267ms | 174 KB | 39% | €3/mo | Costly |
www.ohchr.org www.ohchr.org | Other | 255ms | 0 KB | — | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 185ms | 137 KB | 45% | €2/mo | Optional |
www.ohchr.org www.ohchr.org | Other | 142ms | 17 KB | — | €2/mo | Optional |
www.ohchr.org www.ohchr.org | Other | 124ms | 33 KB | — | €1/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 50ms | 21 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 586ms and costs ~€6/month
- www.ohchr.org adds 563ms and costs ~€6/month
- Google Tag Manager adds 311ms and costs ~€3/month
- Google Tag Manager adds 298ms and costs ~€3/month
- Google Tag Manager adds 267ms and costs ~€3/month
- www.ohchr.org adds 255ms and costs ~€3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 586ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.ohchr.org takes 563ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 311ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 298ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 267ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.ohchr.org takes 255ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev