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.
2.84 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.39 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.51 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.196
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.23 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.
21.00 s
Page Load Progression
375 ms
750 ms
1.1 s
1.5 s 1.9 s 2.2 s 2.6 s 3.0 sDPage Weight BudgetAction2.5 MB transferred, 98 requestsFIX
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
FJS Execution CostAction6528ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.unicef.org/ | 1431ms | 57ms | 4ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WBDQQ5 | 1001ms | 851ms | 95ms | 3rd |
| Unattributable | 558ms | 13ms | 0ms | 3rd |
| https://www.unicef.org/sites/default/files/js/js_14CRNfWuT9WwIin9tibl0vsD-27rHYrtnOu2RDhf2bc.js?scope=footer&delta=2&language=en&theme=unicef_base&include=eJyNkt1ugzAMhV8Imqs9T-QEA1lNHMWmP3v6pRBKmVppN9Y5n40V2zhUxWzxlliws32gYsXArGxldlPQxr0vGTBiBmocwc_dLLFqTyBCQbR6YuiqTEz30mD7KmWegmB1GfqqruhS48_YBeX8ZaciwOLksDNLbDpQILhjNg5HuATO8sJGpIS5GZgHQqswmKGEv_4E33A7wqk5E2Q2S2wEIfvRQgr2sQ_PUyJUNB94IyNk1DGIeap3LIUyWcZb2WIEcrMqx_8XXksplYRZ4mnZ7RyDx946EKyHeCUThHgEj3W2DmI54DHBAsEf0DrrEbEPQO3yzGNCO3vs-lgNR4xaufnA9_qMpg83G9lqhigEGvj5-g4ms8ud1ruL2eWW7H0yl4BXaROnOW14PfOr2TLClG1GmUmlTt-uti3dyx8fB1wP8wtbCUVR&burst=11.2.3_2026_Apr_14 | 472ms | 247ms | 18ms | 3rd |
| https://www.unicef.org/cdn-cgi/challenge-platform/scripts/jsd/main.js | 306ms | 271ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-P0DMSZ8KY6&cx=c>m=4e64k0h2 | 283ms | 233ms | 49ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-BCSVVE74RB&cx=c>m=4e64k0h2 | 279ms | 233ms | 44ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-9ZKVYH4DTE&cx=c>m=4e64k0h2 | 262ms | 189ms | 40ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-9T3VXTE4D3&cx=c>m=4e64k0h2 | 261ms | 224ms | 36ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-ZEPV2PX419&cx=c>m=4e64k0h2 | 256ms | 199ms | 56ms | 3rd |
Showing top 10 of 21 scripts
FJS BundlesAction36 scripts, 809 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-BCSVVE74RB&cx=c>m=4e64k0h2 | 174 KB | 71 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-P0DMSZ8KY6&cx=c>m=4e64k0h2 | 176 KB | 71 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-738121982&cx=c>m=4e64k0h2 | 137 KB | 69 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-9ZKVYH4DTE&cx=c>m=4e64k0h2 | 157 KB | 66 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-368709191&cx=c>m=4e64k0h2 | 147 KB | 66 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-9T3VXTE4D3&cx=c>m=4e64k0h2 | 152 KB | 65 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-11438640&cx=c>m=4e64k0h2 | 129 KB | 65 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-9200789&cx=c>m=4e64k0h2 | 131 KB | 65 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-624899174 | 138 KB | 63 KB (46%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-ZEPV2PX419&cx=c>m=4e64k0h2 | 147 KB | 62 KB (43%) | ✓ | 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
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
FPage Weight InventoryAction98 resources · 2.5 MB · 809 KB savings availableFIX
~809.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 98 resources | 2.5 MiB | ||||||
CImage OptimizationAction31 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
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 Loading3 fonts (73 KB)PASS
Web fonts
3
73 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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 ~5 KB and ~10 ms
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
AHTTP Cachingmax-age=1209600 (2 weeks)PASS
max-age=1209600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 1209600 | Cache for 2 weeks |
Network Waterfall98 requests over 2260msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.unicef.org www.unicef.org | Other | 1431ms | 33 KB | — | $19/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 1001ms | 210 KB | 22% | $13/mo | Costly |
Unattributable Unattributable | Other | 558ms | 0 KB | — | $7/mo | Costly |
www.unicef.org www.unicef.org | Other | 472ms | 60 KB | 72% | $6/mo | Costly |
www.unicef.org www.unicef.org | Other | 306ms | 0 KB | — | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 283ms | 176 KB | 40% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 279ms | 174 KB | 41% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 262ms | 157 KB | 42% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 261ms | 152 KB | 43% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 256ms | 147 KB | 43% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 209ms | 147 KB | 45% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 174ms | 137 KB | 50% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 166ms | 131 KB | 49% | $2/mo | Optional |
cdnjs cdnjs.cloudflare.com | CDN | 165ms | 23 KB | — | $2/mo | Optional |
www.unicef.org www.unicef.org | Other | 146ms | 92 KB | 39% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 144ms | 129 KB | 50% | $2/mo | Optional |
ws.sharethis.com ws.sharethis.com | Other | 113ms | 19 KB | — | $2/mo | Optional |
www.unicef.org www.unicef.org | Other | 87ms | 27 KB | — | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 86ms | 138 KB | 46% | $1/mo | Optional |
LinkedIn Insight snap.licdn.com | Advertising | 72ms | 19 KB | — | $1/mo | Optional |
ws.sharethis.com ws.sharethis.com | Other | 57ms | 27 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.unicef.org adds 1431ms and costs ~$19/month
- Google Tag Manager adds 1001ms and costs ~$13/month
- Unattributable adds 558ms and costs ~$7/month
- www.unicef.org adds 472ms and costs ~$6/month
- www.unicef.org adds 306ms and costs ~$4/month
- Google Tag Manager adds 283ms and costs ~$4/month
- Google Tag Manager adds 279ms and costs ~$4/month
- Google Tag Manager adds 262ms and costs ~$3/month
- Google Tag Manager adds 261ms and costs ~$3/month
- Google Tag Manager adds 256ms and costs ~$3/month
- Google Tag Manager adds 209ms 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
www.unicef.org takes 1431ms 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 1001ms 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
Unattributable takes 558ms 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.unicef.org takes 472ms 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
72% of www.unicef.org's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
www.unicef.org takes 306ms 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 283ms 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 279ms 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 262ms 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 261ms 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 256ms 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 209ms 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
50% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
50% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev