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.
7.41 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
20.70 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
935 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.
9.29 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.
20.98 s
Page Load Progression
FPage Weight BudgetAction2.8 MB transferred, 239 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 CostAction4703ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1034ms | 87ms | 0ms | 3rd |
| https://www.brevo.com/_next/static/chunks/3526-a2f2ef44e1290d15.js | 872ms | 505ms | 7ms | 3rd |
| https://www.brevo.com/ | 656ms | 67ms | 37ms | 3rd |
| https://metrics.brevo.com/dt.js?id=MKMDTST | 596ms | 502ms | 57ms | 3rd |
| https://www.brevo.com/_next/static/chunks/fd9d1056-a07975a04e514552.js | 292ms | 249ms | 12ms | 3rd |
| https://assets.brevo.com/js/fingerprint-source.js | 263ms | 174ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-V8SFL2N220&cx=c>m=4e64h1 | 260ms | 219ms | 37ms | 3rd |
| https://try.abtasty.com/f9a3e011099d4b460c457de53a360bc8/main.84c3e115d3dbf46f3fa3.js | 223ms | 196ms | 20ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js | 182ms | 144ms | 36ms | 3rd |
| https://scripts.clarity.ms/0.8.59/clarity.js | 174ms | 151ms | 6ms | 3rd |
Showing top 10 of 12 scripts
DJS BundlesAction48 scripts, 370 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.brevo.com/_next/static/chunks/8532-0f742d56760de3f1.js | 116 KB | 77 KB (67%) | ✓ | 3rd |
| https://www.brevo.com/_next/static/chunks/1954-c5c9e3ae562d5788.js | 110 KB | 75 KB (68%) | ✓ | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js | 122 KB | 64 KB (53%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-V8SFL2N220&cx=c>m=4e64h1 | 179 KB | 61 KB (34%) | ✓ | 3rd |
| https://metrics.brevo.com/dt.js?id=MKMDTST | 197 KB | 61 KB (31%) | ✓ | 3rd |
| https://try.abtasty.com/f9a3e011099d4b460c457de53a360bc8/main.84c3e115d3dbf46f3fa3.js | 65 KB | 32 KB (50%) | ✓ | 3rd |
| https://www.brevo.com/_next/static/chunks/4959-d7cfaba127c89ef8.js | 9 KB | — | ✓ | 3rd |
| https://get.brevo.com/pr/js | 4 KB | — | ✓ | 3rd |
| https://www.brevo.com/_next/static/chunks/app/%5Blang%5D/layout-561521409af2ba77.js | 10 KB | — | ✓ | 3rd |
| https://www.brevo.com/_next/static/chunks/7079-6046d4084edcf1de.js | 29 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
DPage Weight InventoryAction239 resources · 2.8 MB · 370 KB savings availableFIX
~369.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 239 resources | 2.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization79 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading8 fonts (569 KB)PASS
Web fonts
8
569 KB total
Render-blocking
0
of 8
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
- 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 ~156 KB and ~312 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints72 hints, 0 missing preconnectsPASS
Current Resource Hints
72 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall239 requests over 4187msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1034ms | 0 KB | — | €11/mo | Costly |
www.brevo.com www.brevo.com | Other | 872ms | 31 KB | — | €9/mo | Costly |
www.brevo.com www.brevo.com | Other | 656ms | 69 KB | — | €7/mo | Costly |
metrics.brevo.com metrics.brevo.com | Other | 596ms | 197 KB | 31% | €6/mo | Costly |
www.brevo.com www.brevo.com | Other | 292ms | 53 KB | — | €3/mo | Costly |
assets.brevo.com assets.brevo.com | Other | 263ms | 15 KB | — | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 260ms | 179 KB | 34% | €3/mo | Costly |
try.abtasty.com try.abtasty.com | Other | 223ms | 65 KB | 50% | €2/mo | Costly |
analytics.tiktok.com analytics.tiktok.com | Other | 182ms | 122 KB | 53% | €2/mo | Optional |
Microsoft Clarity scripts.clarity.ms | Session Replay | 174ms | 26 KB | — | €2/mo | Optional |
app.planhat.com app.planhat.com | Other | 97ms | 3 KB | — | €1/mo | Optional |
www.brevo.com www.brevo.com | Other | 53ms | 116 KB | 67% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1034ms and costs ~€11/month
- www.brevo.com adds 872ms and costs ~€9/month
- www.brevo.com adds 656ms and costs ~€7/month
- metrics.brevo.com adds 596ms and costs ~€6/month
- www.brevo.com adds 292ms and costs ~€3/month
- assets.brevo.com adds 263ms and costs ~€3/month
- Google Tag Manager adds 260ms and costs ~€3/month
- try.abtasty.com adds 223ms and costs ~€2/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
Unattributable takes 1034ms 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.brevo.com takes 872ms 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.brevo.com takes 656ms 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
metrics.brevo.com takes 596ms 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.brevo.com takes 292ms 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
assets.brevo.com takes 263ms 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 260ms 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 223ms 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
53% of analytics.tiktok.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
67% of www.brevo.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