Performance
· 27 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.
5.66 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.09 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
425 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.041
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.18 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.
9.19 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2126ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.dalpralab.it/ | 522ms | 52ms | 22ms | 3rd |
| https://www.dalpralab.it/wp-content/themes/Divi/js/theme-scripts-library-base.js?ver=5.8.1 | 458ms | 20ms | 1ms | 3rd |
| Unattributable | 381ms | 5ms | 0ms | 1st |
| https://js.stripe.com/v3/?ver=7.1.4 | 380ms | 244ms | 126ms | 3rd |
| https://www.dalpralab.it/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 216ms | 193ms | 7ms | 3rd |
| https://www.dalpralab.it/wp-content/plugins/creame-whatsapp-me/public/js/joinchat.min.js?ver=6.3.2 | 97ms | 14ms | 1ms | 3rd |
| https://www.dalpralab.it/wp-content/plugins/funnelkit-stripe-woo-payment-gateway/assets/js/paylater.js?ver=1.14.0.5 | 72ms | 70ms | 1ms | 3rd |
DPage Weight InventoryAction80 resources · 1.7 MB · 185 KB savings availableFIX
~185.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 80 resources | 1.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.7 MB transferred, 80 requestsREVIEW
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
BImage Optimization6 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 BundlesAction36 scripts, 185 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://js.stripe.com/v3/?ver=7.1.4 | 280 KB | 185 KB (66%) | ✓ | 3rd |
| https://www.dalpralab.it/wp-content/plugins/cart-for-woocommerce/assets/js/cart.min.js?ver=1.9.1.2 | 10 KB | — | ✓ | 3rd |
| https://www.dalpralab.it/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 29 KB | — | ✓ | 3rd |
| https://www.dalpralab.it/wp-content/plugins/funnelkit-stripe-woo-payment-gateway/assets/js/paylater.js?ver=1.14.0.5 | 2 KB | — | ✓ | 3rd |
| https://www.dalpralab.it/wp-includes/js/underscore.min.js?ver=1.13.8 | 7 KB | — | ✓ | 3rd |
| https://www.dalpralab.it/wp-includes/js/wp-util.min.js?ver=7.1.4 | 1 KB | — | ✓ | 3rd |
| https://www.dalpralab.it/wp-content/plugins/mailin/js/mailin-front.js?ver=1782909126 | 3 KB | — | ✓ | 3rd |
| https://www.dalpralab.it/wp-content/plugins/dalpralab-smart-search/assets/js/fuse.min.js?ver=7.0.0 | 7 KB | — | ✓ | 3rd |
| https://www.dalpralab.it/wp-content/plugins/dalpralab-smart-search/assets/js/smart-search.js?ver=1.3.0 | 6 KB | — | ✗ | 3rd |
| https://www.dalpralab.it/wp-content/themes/Divi/js/theme-scripts-library-base.js?ver=5.8.1 | 1 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
CDocument CompressionActionDocument response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking1 JS blocking issue(s) detectedREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (210 KB)PASS
Web fonts
7
210 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
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 ~27 KB and ~54 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Asset CompressionAll 1 asset host use brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
Network Waterfall80 requests over 5510msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.dalpralab.it www.dalpralab.it | Other | 522ms | 64 KB | — | €3/mo | Costly |
www.dalpralab.it www.dalpralab.it | Other | 458ms | 1 KB | — | €2/mo | Costly |
Stripe js.stripe.com | Payment | 380ms | 280 KB | 66% | €2/mo | Essential |
www.dalpralab.it www.dalpralab.it | Other | 216ms | 29 KB | — | €1/mo | Costly |
www.dalpralab.it www.dalpralab.it | Other | 97ms | 4 KB | — | €1/mo | Optional |
www.dalpralab.it www.dalpralab.it | Other | 72ms | 2 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- www.dalpralab.it adds 522ms and costs ~€3/month
- www.dalpralab.it adds 458ms and costs ~€2/month
- www.dalpralab.it adds 216ms and costs ~€1/month
82% 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.dalpralab.it takes 522ms 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.dalpralab.it takes 458ms 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
66% of Stripe'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
www.dalpralab.it takes 216ms 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
Image Optimization4 images, 220 KB total, 206 KB wastedINFO
Image Optimization Audit
Total Images
4
Total Size
220 KB
Oversized
3
Wasted
206 KB