Performance
· 15 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.
1.15 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.56 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
20 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.093
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.15 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.
3.39 s
Page Load Progression
FPage Weight BudgetAction2.7 MB transferred, 74 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
DPage Weight InventoryAction74 resources · 2.7 MB · 248 KB savings availableFIX
~248.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 74 resources | 2.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction36 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
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
BJS Execution Cost610ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ohchr.org/en/ohchr_homepage | 192ms | 10ms | 0ms | 3rd |
| Unattributable | 123ms | 4ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KV9RGBN | 83ms | 69ms | 13ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-N7SFZJCFK3&cx=c>m=4e64h1 | 81ms | 66ms | 14ms | 3rd |
| https://www.ohchr.org/cdn-cgi/challenge-platform/scripts/jsd/main.js | 68ms | 66ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-380853742&cx=c>m=4e64h1 | 63ms | 51ms | 12ms | 3rd |
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 | 65 KB (37%) | ✓ | 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? | 12 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 | 1 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
Network Waterfall74 requests over 1114msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ohchr.org www.ohchr.org | Other | 192ms | 17 KB | — | €2/mo | Optional |
Unattributable Unattributable | Other | 123ms | 0 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 83ms | 175 KB | 37% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 81ms | 174 KB | 39% | €1/mo | Optional |
www.ohchr.org www.ohchr.org | Other | 68ms | 0 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 63ms | 145 KB | 38% | €1/mo | Optional |
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