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.
668 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.18 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.043
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.34 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.
1.18 s
Page Load Progression
FPage Weight BudgetAction3.0 MB transferred, 134 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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DPage Weight InventoryAction134 resources · 3.0 MB · 287 KB savings availableFIX
~287.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 134 resources | 3.0 MiB | ||||||
BThird-Party Impact45% third-party, 0 ms blockingREVIEW
CImage OptimizationAction48 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
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 Cost684ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://unctad.org/cdn-cgi/challenge-platform/scripts/jsd/main.js | 220ms | 203ms | 2ms | 1st |
| https://unctad.org/ | 195ms | 12ms | 1ms | 1st |
| Unattributable | 149ms | 29ms | 0ms | 3rd |
| https://unctad.org/sites/default/files/js/js_8Q5iy-lLm0zEG5h7yKSmgvTtleQLtgLdjQE6JYnmyv4.js?scope=footer&delta=0&language=en&theme=newyork_b5&include=eJxdjlEKwyAQRC-k8avnkVW3VqI7QVeKt28hpC39mscbBoaKo-JzRaBq4s6pKLqnGNFTgbgPbfcOUZZk3oJdRDsgLDo24edC3324WSvLhqkKseNBnU0GcmVPQnVpicP9C_NduwDo0E6HbzQgff2W50U7dNUi2UyJSslXWpjqzrhk40yNZboLXiksWfk | 68ms | 49ms | 3ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-SN6PPP7BP5&cx=c>m=4e64h1 | 53ms | 41ms | 11ms | 3rd |
CJS BundlesAction38 scripts, 287 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-331595331&cx=c>m=4e64h1 | 137 KB | 66 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-4057246821&cx=c>m=4e64h1 | 137 KB | 66 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-179163753-1 | 117 KB | 63 KB (54%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-SN6PPP7BP5&cx=c>m=4e64h1 | 154 KB | 61 KB (39%) | ✓ | 3rd |
| https://unctad.org/sites/default/files/js/js_8Q5iy-lLm0zEG5h7yKSmgvTtleQLtgLdjQE6JYnmyv4.js?scope=footer&delta=0&language=en&theme=newyork_b5&include=eJxdjlEKwyAQRC-k8avnkVW3VqI7QVeKt28hpC39mscbBoaKo-JzRaBq4s6pKLqnGNFTgbgPbfcOUZZk3oJdRDsgLDo24edC3324WSvLhqkKseNBnU0GcmVPQnVpicP9C_NduwDo0E6HbzQgff2W50U7dNUi2UyJSslXWpjqzrhk40yNZboLXiksWfk | 55 KB | 33 KB (60%) | ✓ | 1st |
| https://unctad.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js? | 0 KB | — | ✓ | 1st |
| https://f.vimeocdn.com/p/4.46.41/js/player.module.js | 0 KB | — | ✓ | 3rd |
| https://static.cloudflareinsights.com/beacon.min.js | 11 KB | — | ✓ | 3rd |
| https://unpkg.com/imagesloaded@5.0.0/imagesloaded.pkgd.min.js | 2 KB | — | ✓ | 3rd |
| https://unctad.org/sites/default/files/js/js_dOZEWzC8VpZPaIbZu9IquwWlpq9ysKCGGtEzHBoN1V8.js?scope=footer&delta=5&language=en&theme=newyork_b5&include=eJxdjlEKwyAQRC-k8avnkVW3VqI7QVeKt28hpC39mscbBoaKo-JzRaBq4s6pKLqnGNFTgbgPbfcOUZZk3oJdRDsgLDo24edC3324WSvLhqkKseNBnU0GcmVPQnVpicP9C_NduwDo0E6HbzQgff2W50U7dNUi2UyJSslXWpjqzrhk40yNZboLXiksWfk | 7 KB | — | ✓ | 1st |
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
BHTTP Cachingmust-revalidate, no-cache, privateREVIEW
must-revalidate, no-cache, private
| Directive | Value | Meaning |
|---|---|---|
| must-revalidate | — | Must recheck with server after expiry |
| no-cache | — | Cache but always revalidate first |
| private | — | Only browser cache, not CDN/proxy |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (342 KB)PASS
Web fonts
4
342 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~135 KB and ~270 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall134 requests over 2510msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 149ms | 0 KB | — | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 53ms | 154 KB | 39% | €1/mo | Optional |