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.
1.46 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.87 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
49 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.
2.35 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.
4.62 s
Page Load Progression
389 ms
777 ms
1.2 s 1.6 s
1.9 s 2.3 s 2.7 s
3.1 sFPage Weight BudgetAction3.8 MB transferred, 212 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
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
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2061ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.euronews.com/ | 563ms | 15ms | 3ms | 3rd |
| Unattributable | 338ms | 54ms | 0ms | 3rd |
| https://ssl.p.jwpcdn.com/player/v/8.46.2/provider.hlsjs.js | 255ms | 179ms | 18ms | 3rd |
| https://scripts.opti-digital.com/lib/?site=euronews&lib=launcher&v=5.3.5 | 176ms | 104ms | 1ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31097850 | 140ms | 88ms | 21ms | 3rd |
| https://ssl.p.jwpcdn.com/player/services/vertical-video/v/0/index.js | 129ms | 76ms | 13ms | 3rd |
| https://www.euronews.com/build/c0de44d07475b825d642-main.js | 114ms | 86ms | 3ms | 3rd |
| https://sdk.privacy-center.org/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/sdk.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js | 88ms | 67ms | 13ms | 3rd |
| https://sdk.privacy-center.org/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/ui-web-en-web.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js | 81ms | 39ms | 8ms | 3rd |
| https://euronewsfr.api.useinsider.com/ins.js?c=0 | 65ms | 51ms | 13ms | 3rd |
Showing top 10 of 12 scripts
DJS BundlesAction70 scripts, 469 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604140101/pubads_impl.js?cb=31097850 | 188 KB | 131 KB (70%) | ✓ | 3rd |
| https://ssl.p.jwpcdn.com/player/v/8.46.2/provider.hlsjs.js | 139 KB | 83 KB (59%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1055912344 | 144 KB | 62 KB (43%) | ✓ | 3rd |
| https://scripts.opti-digital.com/lib/?site=euronews&lib=launcher&v=5.3.5 | 99 KB | 57 KB (58%) | ✓ | 3rd |
| https://ssl.p.jwpcdn.com/player/services/vertical-video/v/0/index.js | 69 KB | 46 KB (66%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/sdk.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js | 101 KB | 45 KB (45%) | ✓ | 3rd |
| https://cdn.jwplayer.com/v2/sites/6HUPuXLy/player.js | 68 KB | 23 KB (34%) | ✓ | 3rd |
| https://ats-wrapper.privacymanager.io/ats-modules/1ce4ee76-b856-49c4-b2c3-c955116dc590/ats.js | 39 KB | 22 KB (57%) | ✓ | 3rd |
| https://static.chartbeat.com/js/chartbeat_mab.js | 10 KB | — | ✓ | 3rd |
| https://www.euronews.com/build/0f0230a11afedd2a0d4a-287.js | 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
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 InventoryAction212 resources · 3.8 MB · 469 KB savings availableFIX
~469.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 212 resources | 3.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization62 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
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 (72 KB)PASS
Web fonts
4
72 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 Waterfall212 requests over 3871msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.euronews.com www.euronews.com | Other | 563ms | 560 KB | — | €6/mo | Costly |
Unattributable Unattributable | Other | 338ms | 0 KB | — | €4/mo | Costly |
ssl.p.jwpcdn.com ssl.p.jwpcdn.com | Other | 255ms | 139 KB | 59% | €3/mo | Costly |
scripts.opti-digital.com scripts.opti-digital.com | Other | 176ms | 99 KB | 58% | €2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 140ms | 188 KB | 70% | €2/mo | Optional |
ssl.p.jwpcdn.com ssl.p.jwpcdn.com | Other | 129ms | 69 KB | 66% | €1/mo | Optional |
www.euronews.com www.euronews.com | Other | 114ms | 23 KB | — | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 88ms | 101 KB | 45% | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 81ms | 53 KB | — | €1/mo | Optional |
euronewsfr.api.useinsider.com euronewsfr.api.useinsider.com | Other | 65ms | 76 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 57ms | 144 KB | 43% | €1/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 53ms | 53 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.euronews.com adds 563ms and costs ~€6/month
- Unattributable adds 338ms and costs ~€4/month
- ssl.p.jwpcdn.com 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
www.euronews.com 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
Unattributable takes 338ms 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
ssl.p.jwpcdn.com 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
59% of ssl.p.jwpcdn.com'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
58% of scripts.opti-digital.com'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
70% of securepubads.g.doubleclick.net'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
66% of ssl.p.jwpcdn.com'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