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.
7.40 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.80 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
530 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.22 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.
12.90 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction3228ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ivoox.com/en/ | 795ms | 24ms | 25ms | 3rd |
| https://static-nweb.ivoox.com/861125a.js | 768ms | 736ms | 9ms | 3rd |
| Unattributable | 526ms | 108ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-N1JZSSD6G9 | 508ms | 189ms | 37ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 242ms | 175ms | 36ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-en-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 156ms | 96ms | 21ms | 3rd |
| https://static-nweb.ivoox.com/e189371.js | 66ms | 31ms | 8ms | 3rd |
| https://static-nweb.ivoox.com/8601d7a.js | 58ms | 51ms | 1ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/src_sdk_core_modules_integrations_sdk-integrations_providers_gcm_gcm_js.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 56ms | 55ms | 0ms | 3rd |
| https://static-nweb.ivoox.com/df75f20.js | 52ms | 49ms | 2ms | 3rd |
DPage Weight InventoryAction85 resources · 1.8 MB · 153 KB savings availableFIX
~153.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 85 resources | 1.8 MiB | ||||||
CPage Weight BudgetAction1.8 MB transferred, 85 requestsREVIEW
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
CImage OptimizationAction37 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
CJS BundlesAction29 scripts, 153 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-N1JZSSD6G9 | 159 KB | 62 KB (39%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 102 KB | 48 KB (47%) | ✓ | 3rd |
| https://static-nweb.ivoox.com/c2fc0d6.js | 40 KB | 23 KB (59%) | ✓ | 3rd |
| https://static-nweb.ivoox.com/5fd3465.js | 28 KB | 20 KB (74%) | ✓ | 3rd |
| https://static-nweb.ivoox.com/14b944e.js | 9 KB | — | ✓ | 3rd |
| https://static-nweb.ivoox.com/3ca965f.js | 2 KB | — | ✓ | 3rd |
| https://static-nweb.ivoox.com/e189371.js | 28 KB | — | ✓ | 3rd |
| https://static-nweb.ivoox.com/bcca722.js | 4 KB | — | ✓ | 3rd |
| https://static-nweb.ivoox.com/2b1dfbe.js | 30 KB | — | ✓ | 3rd |
| https://static-nweb.ivoox.com/f2aa688.js | 12 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
BHTTP Cachingmax-age=0, stale-while-revalidate=3600REVIEW
max-age=0, stale-while-revalidate=3600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
| stale-while-revalidate | 3600 | Serve stale for 1 hour while fetching fresh |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (225 KB)PASS
Web fonts
4
225 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- 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 ~94 KB and ~188 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints35 hints, 0 missing preconnectsPASS
Current Resource Hints
35 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall85 requests over 2718msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ivoox.com www.ivoox.com | Other | 795ms | 71 KB | — | €9/mo | Costly |
static-nweb.ivoox.com static-nweb.ivoox.com | Other | 768ms | 42 KB | — | €8/mo | Costly |
Unattributable Unattributable | Other | 526ms | 0 KB | — | €6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 508ms | 159 KB | 39% | €6/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 242ms | 102 KB | 47% | €3/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 156ms | 53 KB | — | €2/mo | Optional |
static-nweb.ivoox.com static-nweb.ivoox.com | Other | 66ms | 28 KB | — | €1/mo | Optional |
static-nweb.ivoox.com static-nweb.ivoox.com | Other | 58ms | 2 KB | — | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 56ms | 1 KB | — | €1/mo | Optional |
static-nweb.ivoox.com static-nweb.ivoox.com | Other | 52ms | 7 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.ivoox.com adds 795ms and costs ~€9/month
- static-nweb.ivoox.com adds 768ms and costs ~€8/month
- Unattributable adds 526ms and costs ~€6/month
- Google Tag Manager adds 508ms and costs ~€6/month
- sdk.privacy-center.org adds 242ms 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.ivoox.com takes 795ms 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
static-nweb.ivoox.com takes 768ms 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 526ms 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 508ms 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
sdk.privacy-center.org takes 242ms 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