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.
4.00 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
20.37 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.33 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.
5.78 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.
36.92 s
Page Load Progression
375 ms 750 ms 1.1 s
1.5 s
1.9 s 2.2 s 2.6 s 3.0 sFPage Weight BudgetAction3.6 MB transferred, 1081 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
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 CostAction9059ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 4023ms | 1718ms | 0ms | 3rd |
| https://www.futura-sciences.com/ | 935ms | 191ms | 2ms | 3rd |
| https://d2wy8f7a9ursnm.cloudfront.net/v8/bugsnag.min.js | 645ms | 543ms | 0ms | 3rd |
| https://pm-widget.taboola.com/futurasciences/pmk-20220605.5.js | 509ms | 462ms | 10ms | 3rd |
| https://cdn.taboola.com/libtrc/futurasciences/loader.js | 396ms | 216ms | 172ms | 3rd |
| https://sync.sparteo.com/crossfire.js | 356ms | 264ms | 7ms | 3rd |
| https://ats-wrapper.privacymanager.io/ats-modules/fc08336b-e94e-4883-8172-64c45243855e/ats.js | 330ms | 291ms | 37ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N754K45R | 325ms | 273ms | 44ms | 3rd |
| https://static.fastcmp.com/fast-cmp-stub.modern.49e78b90f1ade5193ad4.js | 320ms | 210ms | 24ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-7SDBBF62D1&cx=c>m=4e64k0 | 220ms | 157ms | 55ms | 3rd |
Showing top 10 of 19 scripts
DJS BundlesAction111 scripts, 492 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.taboola.com/libtrc/futurasciences/loader.js | 323 KB | 198 KB (61%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-7SDBBF62D1&cx=c>m=4e64k0 | 148 KB | 60 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N754K45R | 121 KB | 59 KB (49%) | ✓ | 3rd |
| https://www.google.com/cse/static/element/b33cba5881f68fbf/cse_element__fr.js?usqp=CAI%3D | 99 KB | 47 KB (48%) | ✓ | 3rd |
| https://ats-wrapper.privacymanager.io/ats-modules/fc08336b-e94e-4883-8172-64c45243855e/ats.js | 75 KB | 39 KB (52%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 34 KB (35%) | ✓ | 3rd |
| https://cse.google.com/adsense/search/async-ads.js | 44 KB | 32 KB (73%) | ✓ | 3rd |
| https://static.fastcmp.com/fast-cmp-stub.modern.49e78b90f1ade5193ad4.js | 61 KB | 23 KB (38%) | ✓ | 3rd |
| https://cs.openwebmp.com/cs?fwrd=1&aid=40035&id=a987e42d13ed97cc80fd16b87516af38 | 0 KB | — | ✓ | 3rd |
| https://eus.rubiconproject.com/usync.js | 0 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 InventoryAction1081 resources · 3.6 MB · 492 KB savings availableFIX
~492.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 1081 resources | 3.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization330 images, 0 KB saveableREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (52 KB)PASS
Web fonts
2
52 KB total
Render-blocking
0
of 2
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 Hints15 hints, 0 missing preconnectsPASS
Current Resource Hints
15 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 Waterfall1081 requests over 20410msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 4023ms | 0 KB | — | €44/mo | Costly |
www.futura-sciences.com www.futura-sciences.com | Other | 935ms | 23 KB | — | €10/mo | Costly |
d2wy8f7a9ursnm.cloudfront.net d2wy8f7a9ursnm.cloudfront.net | Other | 645ms | 16 KB | — | €7/mo | Costly |
pm-widget.taboola.com pm-widget.taboola.com | Other | 509ms | 24 KB | — | €6/mo | Costly |
cdn.taboola.com cdn.taboola.com | Other | 396ms | 323 KB | 61% | €4/mo | Costly |
sync.sparteo.com sync.sparteo.com | Other | 356ms | 13 KB | — | €4/mo | Costly |
ats-wrapper.privacymanager.io ats-wrapper.privacymanager.io | Other | 330ms | 75 KB | 52% | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 325ms | 121 KB | 49% | €4/mo | Costly |
static.fastcmp.com static.fastcmp.com | Other | 320ms | 61 KB | 38% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 220ms | 148 KB | 41% | €2/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 184ms | 97 KB | 35% | €2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 152ms | 16 KB | — | €2/mo | Optional |
notifpush.com notifpush.com | Other | 152ms | 22 KB | — | €2/mo | Optional |
cse.google.com cse.google.com | Other | 132ms | 4 KB | — | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 93ms | 45 KB | — | €1/mo | Optional |
tag.aticdn.net tag.aticdn.net | Other | 86ms | 27 KB | — | €1/mo | Optional |
www.google.com www.google.com | Other | 72ms | 99 KB | 48% | €1/mo | Optional |
notifpush.com notifpush.com | Other | 71ms | 15 KB | — | €1/mo | Optional |
launchpad-wrapper.privacymanager.io launchpad-wrapper.privacymanager.io | Other | 58ms | 2 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 4023ms and costs ~€44/month
- www.futura-sciences.com adds 935ms and costs ~€10/month
- d2wy8f7a9ursnm.cloudfront.net adds 645ms and costs ~€7/month
- pm-widget.taboola.com adds 509ms and costs ~€6/month
- cdn.taboola.com adds 396ms and costs ~€4/month
- sync.sparteo.com adds 356ms and costs ~€4/month
- ats-wrapper.privacymanager.io adds 330ms and costs ~€4/month
- Google Tag Manager adds 325ms and costs ~€4/month
- static.fastcmp.com adds 320ms and costs ~€3/month
- Google Tag Manager adds 220ms 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 4023ms 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.futura-sciences.com takes 935ms 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
d2wy8f7a9ursnm.cloudfront.net takes 645ms 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
pm-widget.taboola.com takes 509ms 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.taboola.com takes 396ms 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
61% of cdn.taboola.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
sync.sparteo.com takes 356ms 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
ats-wrapper.privacymanager.io takes 330ms 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
52% of ats-wrapper.privacymanager.io'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
Google Tag Manager takes 325ms 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.fastcmp.com takes 320ms 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 220ms 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