https://Costruzionifbi.it
Performance
· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
86
GRADE
B
FIX
2
REVIEW
8
PASS
13
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
40
83
96
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.15 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.37 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
85 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.602
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.27 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.
7.55 s
Page Load Progression
560 ms 1.1 s 1.7 s 2.2 s 2.8 s 3.4 s
3.9 s
4.5 sChecks
2613 PASS 8 REVIEW 2 FIX
DJS Execution CostAction2142ms total JS executionFIX
JS Execution Cost
Action2142ms total JS execution
2142ms total JS execution
Warning::
https://costruzionifbi.it/wp-content/plugins/revsl...: 596ms CPU time
Warning::
https://costruzionifbi.it/: 488ms CPU time
Info::
Unattributable: 249ms CPU time
Info::
https://costruzionifbi.it/wp-content/plugins/revsl...: 246ms CPU time
Info::
https://cdn.iubenda.com/cookie_solution/iubenda_cs...: 205ms CPU time
Info::
Third-party scripts: 318ms (15% of total)
Main Thread Breakdown
Script Evaluation 44% Other 24% Style & Layout 19% Script Parsing & Compilation 6% Parse HTML & CSS 3% Rendering 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://costruzionifbi.it/wp-content/plugins/revslider/public/assets/js/rbtools.min.js?ver=6.2.22 | 596ms | 243ms | 10ms | 1st |
| https://costruzionifbi.it/ | 488ms | 84ms | 14ms | 1st |
| Unattributable | 249ms | 6ms | 0ms | 1st |
| https://costruzionifbi.it/wp-content/plugins/revslider/public/assets/js/rs6.min.js?ver=6.2.22 | 246ms | 177ms | 22ms | 1st |
| https://cdn.iubenda.com/cookie_solution/iubenda_cs/1.104.2/core-it.js | 205ms | 161ms | 30ms | 3rd |
| https://costruzionifbi.it/wp-includes/js/jquery/jquery.min.js?ver=3.5.1 | 173ms | 126ms | 8ms | 1st |
| https://cdn.iubenda.com/iubenda.js | 112ms | 91ms | 5ms | 3rd |
| https://costruzionifbi.it/wp-includes/js/dist/vendor/wp-polyfill.min.js?ver=7.4.4 | 72ms | 65ms | 7ms | 1st |
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization3 images, 0 KB saveableREVIEW
Image Optimization
3 images, 0 KB saveable
3 images, 0 KB saveable
Warning::
https://costruzionifbi.it/wp-content/uploads/2021/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
3 images 177 KB
0 oversized -0 KB
3 legacy format
1 missing dimensions CLS risk
Set explicit width and height to prevent CLS.
Why this matters
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
JS Bundles
Action30 scripts, 161 KB unused
30 scripts, 161 KB unused
Warning::
https://cdn.iubenda.com/cookie_solution/iubenda_cs...: 56 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://costruzionifbi.it/wp-content/themes/magicb...: 47 KB unused (85%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://costruzionifbi.it/wp-content/plugins/revsl...: 37 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://costruzionifbi.it/wp-content/plugins/revsl...: 22 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 161 KB
161 KB unused JavaScript
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 | 47 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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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
HTTP/3 (QUIC)
HTTP/3 not advertised
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
CCompression AlgorithmActionMain response served uncompressedREVIEW
Compression Algorithm
ActionMain response served uncompressed
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
JavaScript Blocking
2 JS blocking issue(s) detected
2 JS blocking issue(s) detected
Warning::
32 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Page uses document.write() -- disables Chrome's preload scanner
`document.write()` blocks all parallel resource discovery while it executes. Chrome explicitly disables the preload scanner on connections it judges slow when document.write is detected, serializing the entire subtree load. Almost always third-party ad / analytics legacy code; replacing with createElement + appendChild (or refusing to integrate the offending vendor) recovers significant load-time on mobile.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
APage Weight Budget954 KB transferred, 55 requestsPASS
Page Weight Budget
954 KB transferred, 55 requests
954 KB transferred, 55 requests
Info::
Page weighs 2.6 MB (954 KB transferred)
Info::
55 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
954 KB transferred
55 requests
0.20 g CO2 per page load
JavaScript 475.3 KiB 50%
Images 177.1 KiB 19%
Fonts 169.9 KiB 18%
CSS 101.7 KiB 11%
HTML 20.4 KiB 2%
Other 8.6 KiB 1%
Other 573 B 0%
0 2.4 MB 4.9 MB
Under budget
AThird-Party Impact24% third-party, 0 ms blockingPASS
Third-Party Impact
24% third-party, 0 ms blocking
24% third-party, 0 ms blocking
Info::
Third-party code accounts for 24% of page weight (225.7 KiB of 953.6 KiB)
Info::
Third-party blocking time is low (0 ms)
76%
24%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Font Loading4 fonts (170 KB)PASS
Font Loading
4 fonts (170 KB)
4 fonts (170 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
170 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
mfn-icons.woff woff swap
Size 79 KB
Load time 69 ms
Start 3.6 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 81 ms
Start 3.6 s
Risk FOUT — text flashes from fallback to web font
KFO5CnqEu92Fr1Mu53ZEC9_... woff2 swap
Size 41 KB
Load time 85 ms
Start 3.6 s
Risk FOUT — text flashes from fallback to web font
memSYaGs126MiZpBA-UvWbX... woff2 swap
Size 13 KB
Load time 38 ms
Start 3.7 s
Risk FOUT — text flashes from fallback to web font
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
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource Hints2 hints, 0 missing preconnectsPASS
Resource Hints
2 hints, 0 missing preconnects
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch 2
prefetch—
2 resource hints configured
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: User-Agent
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Page Weight Inventory55 resources · 954 KB · 161 KB savings availablePASS
Page Weight Inventory
55 resources · 954 KB · 161 KB savings available
55 resources · 954 KB · 161 KB savings available
Info::
Within 1MB page-weight target
Got: 954 KB
Info::
~161 KB of savings available
Info::
14 third-party resources (24% of weight)
55 resources · 953.6 KiB · 14 third-party Within 1MB page-weight target
JavaScript 50% · 475.3 KiB
Image 19% · 185.7 KiB
Font 18% · 169.9 KiB
CSS 11% · 101.7 KiB
Document 2% · 20.4 KiB
Other 0% · 573 B
~161.1 KiB of savings available
Remove unused JavaScript: 161.1 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 55 resources | 953.6 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
13 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall55 requests over 4211msINFO
Network Waterfall
55 requests over 4211ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
15% of JavaScript execution is third-party
First-party Third-party 318ms · 120KB · €2/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Iubenda cdn.iubenda.com | Consent | 205ms | 113 KB | 50% | €1/mo | Essential |
Iubenda cdn.iubenda.com | Consent | 112ms | 7 KB | — | €1/mo | Essential |
Iubenda
Consent
Execution 205ms
Transfer 113 KB
Unused 50%
Monthly Cost €1/mo
Iubenda
Consent
Execution 112ms
Transfer 7 KB
Monthly Cost €1/mo
Image Optimization5 images, 43 KB total, 0 KB wastedINFO
Image Optimization
5 images, 43 KB total, 0 KB wasted
Image Optimization Audit
Total Images
5
Total Size
43 KB
4 missing dimensions 4 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.