Performance
· 22 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.
676 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
996 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
256 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.
1.40 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.
3.44 s
Page Load Progression
FPage Weight BudgetAction2.6 MB transferred, 61 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS BundlesAction13 scripts, 803 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.psicologi-italia.it/vendor/iwtemplate2020/js/app.js?vrid=0e6324dab1c838b4c0ddb95d8698ba43 | 894 KB | 371 KB (42%) | ✗ | 3rd |
| https://maps.googleapis.com/maps/api/js?key=AIzaSyDZ4QtA4v3LOpZ8GzPYpszUOnmSPktnJLk&libraries=places&callback=initGoogleAutocomplete | 366 KB | 204 KB (56%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NVJRNBZ8 | 162 KB | 69 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16987521732&cx=c>m=4e67e0 | 150 KB | 67 KB (44%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/bundle/sdk.js/ | 78 KB | 54 KB (69%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 99 KB | 38 KB (39%) | ✓ | 3rd |
| https://www.psicologi-italia.it/vendor/iwtemplate2020/js/vendor.js?vrid=0e6324dab1c838b4c0ddb95d8698ba43 | 1 KB | — | ✓ | 3rd |
| https://www.psicologi-italia.it/js/app.js?vrid=ef403ca0b1bc7c2c5ddab58432fd202b | 29 KB | — | ✓ | 3rd |
| https://connect.facebook.net/en_US/sdk.js | 5 KB | — | ✓ | 3rd |
| https://diffuser-cdn.app-us1.com/diffuser/diffuser.js | 8 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 InventoryAction61 resources · 2.6 MB · 803 KB savings availableFIX
~803.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 61 resources | 2.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization30 images, 0 KB saveableREVIEW
BJS Execution Cost998ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.psicologi-italia.it/vendor/iwtemplate2020/js/app.js?vrid=0e6324dab1c838b4c0ddb95d8698ba43 | 390ms | 199ms | 141ms | 3rd |
| https://www.psicologi-italia.it/ | 282ms | 28ms | 2ms | 3rd |
| Unattributable | 126ms | 2ms | 0ms | 1st |
| https://maps.googleapis.com/maps/api/js?key=AIzaSyDZ4QtA4v3LOpZ8GzPYpszUOnmSPktnJLk&libraries=places&callback=initGoogleAutocomplete | 83ms | 53ms | 28ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16987521732&cx=c>m=4e67e0 | 62ms | 54ms | 7ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NVJRNBZ8 | 56ms | 45ms | 10ms | 3rd |
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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (158 KB)PASS
Web fonts
7
158 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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)
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+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall61 requests over 2779msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.psicologi-italia.it www.psicologi-italia.it | Other | 390ms | 894 KB | 42% | €4/mo | Costly |
www.psicologi-italia.it www.psicologi-italia.it | Other | 282ms | 15 KB | — | €3/mo | Costly |
maps.googleapis.com maps.googleapis.com | Other | 83ms | 366 KB | 56% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 62ms | 150 KB | 44% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 56ms | 162 KB | 43% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.psicologi-italia.it adds 390ms and costs ~€4/month
- www.psicologi-italia.it adds 282ms and costs ~€3/month
87% 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.psicologi-italia.it takes 390ms 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.psicologi-italia.it takes 282ms 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
56% of maps.googleapis.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
Image Optimization41 images, 495 KB total, 11 KB wastedINFO
Image Optimization Audit
Total Images
41
Total Size
495 KB
Oversized
2
Wasted
11 KB