Performance
· 25 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.
7.01 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
16.22 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.21 s
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.
8.31 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.
17.20 s
Page Load Progression
FPage Weight BudgetAction2.6 MB transferred, 172 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
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5858ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/143-0c71e766e8477c20.js | 1256ms | 1199ms | 52ms | 3rd |
| https://www.intermarche.com/ | 881ms | 36ms | 81ms | 3rd |
| Unattributable | 866ms | 168ms | 0ms | 1st |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/1255-e1788e884ed3dbfa.js | 711ms | 649ms | 15ms | 3rd |
| https://www.intermarche.com/fpm/ssmtg/?id=GTM-WLP6T4B | 606ms | 511ms | 52ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KJSCTC6 | 376ms | 325ms | 46ms | 3rd |
| https://sdk.privacy-center.org/sdk/fdad10f6ad3ebf4d2fe8a93e9576ccf0eb0a78c3/modern/sdk.fdad10f6ad3ebf4d2fe8a93e9576ccf0eb0a78c3.js | 267ms | 219ms | 48ms | 3rd |
| https://try.abtasty.com/4ec90b365fc67dc7dc08077e3e26291d/main.1d09d83601b989476cee.js | 214ms | 189ms | 18ms | 3rd |
| https://dt.intermarche.com/tags.js | 194ms | 165ms | 8ms | 3rd |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/main-app-1f61836d54cf9ac3.js | 176ms | 175ms | 0ms | 3rd |
Showing top 10 of 13 scripts
DJS BundlesAction95 scripts, 462 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/143-0c71e766e8477c20.js | 82 KB | 81 KB (99%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KJSCTC6 | 183 KB | 78 KB (43%) | ✓ | 3rd |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/aaea2bcf-884442894952ffeb.js | 84 KB | 60 KB (71%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/fdad10f6ad3ebf4d2fe8a93e9576ccf0eb0a78c3/modern/sdk.fdad10f6ad3ebf4d2fe8a93e9576ccf0eb0a78c3.js | 102 KB | 44 KB (43%) | ✓ | 3rd |
| https://try.abtasty.com/4ec90b365fc67dc7dc08077e3e26291d/main.1d09d83601b989476cee.js | 78 KB | 39 KB (50%) | ✓ | 3rd |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/8634.b9efcd202b224296.js | 36 KB | 34 KB (94%) | ✓ | 3rd |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/1269-bc171d9ae41ab225.js | 34 KB | 29 KB (84%) | ✓ | 3rd |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/2351-a9b9ad76e9e1f4d6.js | 30 KB | 28 KB (93%) | ✓ | 3rd |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/7649-a1866758a39fd892.js | 35 KB | 25 KB (71%) | ✓ | 3rd |
| https://cdn.intermarche.com/web/assets/99-0-3-0/_next/static/chunks/996-1d49e69a7615ad71.js | 28 KB | 25 KB (89%) | ✓ | 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 InventoryAction172 resources · 2.6 MB · 462 KB savings availableFIX
~462.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 172 resources | 2.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction24 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
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 Loading11 fonts (272 KB)PASS
Web fonts
11
272 KB total
Render-blocking
0
of 11
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
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Network Waterfall172 requests over 2801msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.intermarche.com cdn.intermarche.com | Other | 1256ms | 82 KB | 99% | €14/mo | Costly |
www.intermarche.com www.intermarche.com | Other | 881ms | 0 KB | — | €10/mo | Costly |
cdn.intermarche.com cdn.intermarche.com | Other | 711ms | 43 KB | — | €8/mo | Costly |
www.intermarche.com www.intermarche.com | Other | 606ms | 0 KB | — | €7/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 376ms | 183 KB | 43% | €4/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 267ms | 102 KB | 43% | €3/mo | Costly |
try.abtasty.com try.abtasty.com | Other | 214ms | 78 KB | 50% | €2/mo | Costly |
dt.intermarche.com dt.intermarche.com | Other | 194ms | 42 KB | — | €2/mo | Optional |
cdn.intermarche.com cdn.intermarche.com | Other | 176ms | 1 KB | — | €2/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 130ms | 55 KB | — | €1/mo | Optional |
cdn.intermarche.com cdn.intermarche.com | Other | 124ms | 53 KB | — | €1/mo | Optional |
try.abtasty.com try.abtasty.com | Other | 59ms | 8 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- cdn.intermarche.com adds 1256ms and costs ~€14/month
- www.intermarche.com adds 881ms and costs ~€10/month
- cdn.intermarche.com adds 711ms and costs ~€8/month
- www.intermarche.com adds 606ms and costs ~€7/month
- Google Tag Manager adds 376ms and costs ~€4/month
- sdk.privacy-center.org adds 267ms and costs ~€3/month
- try.abtasty.com adds 214ms and costs ~€2/month
85% 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
cdn.intermarche.com takes 1256ms 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
99% of cdn.intermarche.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
www.intermarche.com takes 881ms 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
cdn.intermarche.com takes 711ms 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.intermarche.com takes 606ms 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 376ms 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 267ms 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
try.abtasty.com takes 214ms 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 try.abtasty.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