Performance
· 21 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.
857 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.82 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.263
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.94 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.
1.82 s
Page Load Progression
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization3 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
CJS BundlesAction30 scripts, 161 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.iubenda.com/cookie_solution/iubenda_cs/1.104.2/core-it.js | 113 KB | 56 KB (50%) | ✓ | 3rd |
| https://costruzionifbi.it/wp-content/themes/magicbev9/js/plugins.js?ver=21.9.7 | 55 KB | 46 KB (85%) | ✓ | 1st |
| https://costruzionifbi.it/wp-content/plugins/revslider/public/assets/js/rs6.min.js?ver=6.2.22 | 82 KB | 37 KB (45%) | ✓ | 1st |
| https://costruzionifbi.it/wp-content/plugins/revslider/public/assets/js/rbtools.min.js?ver=6.2.22 | 44 KB | 22 KB (50%) | ✓ | 1st |
| https://costruzionifbi.it/wp-includes/js/jquery/ui/sortable.min.js?ver=1.12.1 | 6 KB | — | ✓ | 1st |
| https://costruzionifbi.it/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.3.2 | 4 KB | — | ✓ | 1st |
| https://costruzionifbi.it/wp-includes/js/dist/i18n.min.js?ver=ac389435e7fd4ded01cf603f3aaba6a6 | 4 KB | — | ✓ | 1st |
| https://costruzionifbi.it/wp-includes/js/dist/vendor/lodash.min.js?ver=4.17.19 | 25 KB | — | ✓ | 1st |
| https://costruzionifbi.it/wp-includes/js/dist/url.min.js?ver=98645f0502e5ed8dadffd161e39072d2 | 5 KB | — | ✓ | 1st |
| https://costruzionifbi.it/wp-includes/js/dist/hooks.min.js?ver=84b89ab09cbfb4469f02183611cc0939 | 2 KB | — | ✓ | 1st |
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
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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
APage Weight Budget954 KB transferred, 55 requestsPASS
AThird-Party Impact24% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+JS Execution Cost364ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://costruzionifbi.it/wp-content/plugins/revslider/public/assets/js/rbtools.min.js?ver=6.2.22 | 159ms | 57ms | 2ms | 1st |
| https://costruzionifbi.it/ | 142ms | 23ms | 2ms | 1st |
| https://costruzionifbi.it/wp-content/plugins/revslider/public/assets/js/rs6.min.js?ver=6.2.22 | 63ms | 46ms | 6ms | 1st |
A+Font Loading4 fonts (170 KB)PASS
Web fonts
4
170 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
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 ~24 KB and ~48 ms
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 Intelligence2 server-response signal(s) detectedPASS
A+Page Weight Inventory55 resources · 954 KB · 161 KB savings availablePASS
~161.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 55 resources | 953.5 KiB | ||||||
Network Waterfall55 requests over 1911msINFO
Image Optimization5 images, 43 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
5
Total Size
43 KB