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Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
5
REVIEW
6
PASS
8
INFO
3

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
44
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
77
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.72 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

3.54 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

49 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

1.086

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.51 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.

3.56 s

Page Load Progression

583 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
22
8 PASS 6 REVIEW 5 FIX
D
Page Weight Budget
Action
2.4 MB transferred, 102 requests
FIX
2.4 MB transferred, 102 requests
Info::
Page weighs 4.9 MB (2.4 MB transferred)
Warning::
Images are 1.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.2 MB
Warning::
JavaScript is 992 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 992 KB
Warning::
102 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.50 g CO2 per page load
2.4 MB / 2.4 MB budget
2.4 MB transferred
102 requests
0.50 g CO2 per page load
Images 1.2 MiB 50%
JavaScript 991.6 KiB 41%
Fonts 122.3 KiB 5%
CSS 59.4 KiB 2%
Other 29.4 KiB 1%
HTML 19.0 KiB 1%
Other 3.7 KiB 0%
Other 553 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

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.

Why this matters

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.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.4 MiB of 2.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
20 scripts, 450 KB unused
FIX
20 scripts, 450 KB unused
Warning::
https://kosmos-prod.react.gammacdn.com/app.modern....: 234 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-HCRT...: 69 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.izooto.com/scripts/sdk/main.js: 63 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TWV...: 62 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static01-cms-fame.gammacdn.com/c/minify/80...: 22 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 450 KB
450 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://kosmos-prod.react.gammacdn.com/app.modern.a55b1bb9210948d9a92f.js426 KB234 KB (55%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-HCRTF4K1E5&cx=c&gtm=4e6781155 KB69 KB (44%)✓3rd
https://cdn.izooto.com/scripts/sdk/main.js96 KB63 KB (66%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TWVMJ48128 KB62 KB (49%)✓3rd
https://static01-cms-fame.gammacdn.com/c/minify/80/6628daca02f400be6ec1cae12b1bdf.js34 KB22 KB (66%)✓3rd
https://kosmos-prod.react.gammacdn.com/react-18-2-0-prod.js4 KB—✓3rd
https://kosmos-prod.react.gammacdn.com/component-Promobar.modern.4414bc1baabe32ed8b91.js2 KB—✓3rd
https://www.roccosiffredi.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js4 KB—✓3rd
https://kosmos-prod.react.gammacdn.com/ajv.modern.dc1ca7d5f1faf79c83c3.js32 KB—✓3rd
https://kosmos-prod.react.gammacdn.com/legal-client.modern.9a29259d58b342b57caa.js2 KB—✓3rd

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

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

F
Page Weight Inventory
Action
102 resources · 2.4 MB · 450 KB savings available
FIX
102 resources · 2.4 MB · 450 KB savings available
Warning::
Page weight 2.4 MB exceeds 1 MB target by 1.4 MB
Got: 2.4 MB Expected: ≤ 1 MB
Info::
~450 KB of savings available
Warning::
101 third-party resources (100% of weight)
Info::
1 resources over 200KB
102 resources · 2.4 MiB · 101 third-party 1.4 MiB over 1MB target
Image 50% · 1.2 MiB
JavaScript 41% · 991.6 KiB
Font 5% · 122.3 KiB
CSS 2% · 59.4 KiB
Document 1% · 29.5 KiB
Other 1% · 20.4 KiB

~450.3 KiB of savings available

Remove unused JavaScript: 450.3 KiB
F
HTTP Caching
Action
No cache headers
FIX
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.

B
Image Optimization
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Warning::
https://ctf-images.gammacdn.com/cdyxtpbavd4i/clAOh... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42 images 1.2 MB
0 oversized -0 KB
8 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

C
JS Execution Cost
Action
1132ms total JS execution
REVIEW
1132ms total JS execution
Warning::
https://kosmos-prod.react.gammacdn.com/react-18-2-...: 405ms CPU time
Info::
https://kosmos-prod.react.gammacdn.com/app.modern....: 231ms CPU time
Info::
Unattributable: 164ms CPU time
Info::
https://www.roccosiffredi.com/sfw: 84ms CPU time
Info::
https://www.roccosiffredi.com/cdn-cgi/scripts/7d0f...: 82ms CPU time
Warning::
Third-party scripts: 967ms (85% of total)

Main Thread Breakdown

Script Evaluation 63% Other 19% Style & Layout 7% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://kosmos-prod.react.gammacdn.com/react-18-2-0-prod.js405ms376ms0ms3rd
https://kosmos-prod.react.gammacdn.com/app.modern.a55b1bb9210948d9a92f.js231ms145ms38ms3rd
Unattributable164ms23ms0ms1st
https://www.roccosiffredi.com/sfw84ms1ms0ms3rd
https://www.roccosiffredi.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js82ms32ms3ms3rd
https://kosmos-prod.react.gammacdn.com/ajv.modern.dc1ca7d5f1faf79c83c3.js58ms55ms2ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TWVMJ4856ms46ms9ms3rd
https://cdn.izooto.com/scripts/sdk/main.js50ms37ms9ms3rd
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
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.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
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.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
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.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
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.
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
5 fonts (122 KB)
PASS
5 fonts (122 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

122 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.7 s LCP 3.5 shttps://static01-cms-buddies.gammacdn.com/evilangel/m/cs4y2tri7s0gggo0/Lato-Regular.woff2Lato-Regular.woff2 https://static01-cms-buddies.gammacdn.com/evilangel/m/cs4y2tri7s0gggo0/Lato-Regular.woff2 — 29.3 KiB — 9 ms — font-display: swaphttps://static01-cms-fame.gammacdn.com/underthebed/m/cust0114gpc88840/hind-regular-webfont.woff2hind-regular-webfont.woff2 https://static01-cms-fame.gammacdn.com/underthebed/m/cust0114gpc88840/hind-regular-webfont.woff2 — 18.0 KiB — 7 ms — font-display: swaphttps://static01-cms-fame.gammacdn.com/underthebed/m/6azd2cshpdc8scgk/hind-bold-webfont.woff2hind-bold-webfont.woff2 https://static01-cms-fame.gammacdn.com/underthebed/m/6azd2cshpdc8scgk/hind-bold-webfont.woff2 — 17.9 KiB — 4 ms — font-display: swaphttps://static01-cms-buddies.gammacdn.com/evilangel/m/18nby11jr6jo4s0g/Lato-Bold.woff2Lato-Bold.woff2 https://static01-cms-buddies.gammacdn.com/evilangel/m/18nby11jr6jo4s0g/Lato-Bold.woff2 — 28.8 KiB — 5 ms — font-display: swaphttps://static01-cms-buddies.gammacdn.com/evilangel/m/24reawf4md5w04cs/Lato-Black.woff2Lato-Black.woff2 https://static01-cms-buddies.gammacdn.com/evilangel/m/24reawf4md5w04cs/Lato-Black.woff2 — 28.3 KiB — 4 ms — font-display: swap
Lato-Regular.woff2 woff2 swap
Size 29 KB
Load time 9 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
hind-regular-webfont.woff2 woff2 swap
Size 18 KB
Load time 7 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
hind-bold-webfont.woff2 woff2 swap
Size 18 KB
Load time 4 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
Lato-Bold.woff2 woff2 swap
Size 29 KB
Load time 5 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
Lato-Black.woff2 woff2 swap
Size 28 KB
Load time 4 ms
Start 1.6 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)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
102 requests over 4732ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.7 s LCP 3.5 shttps://roccosiffredi.com// https://roccosiffredi.com/ — 301 — 418 B — 188 ms — h2https://www.roccosiffredi.com/www.roccosiffredi.com/ https://www.roccosiffredi.com/ — 302 — 549 B — 311 ms — h2https://www.roccosiffredi.com/sfwwww.roccosiffredi.com/sfw https://www.roccosiffredi.com/sfw — 200 — 17.4 KiB — 579 ms — h2https://static01-cms-fame.gammacdn.com/c/minify/5c/052886e25b8670a1a4d4f10624eb3d.cssstatic01-cms-fame.gammacdn.com/c/mi... https://static01-cms-fame.gammacdn.com/c/minify/5c/052886e25b8670a1a4d4f10624eb3d.css — 200 — 829 B — 31 ms — h2https://static01-cms-fame.gammacdn.com/c/minify/3d/c9cbbace115d15fbd09a663a13d03d.cssstatic01-cms-fame.gammacdn.com/c/mi... https://static01-cms-fame.gammacdn.com/c/minify/3d/c9cbbace115d15fbd09a663a13d03d.css — 200 — 871 B — 27 ms — h2https://static01-cms-fame.gammacdn.com/c/minify/c9/65912b2679e997bbde94f588e7a2bb.cssstatic01-cms-fame.gammacdn.com/c/mi... https://static01-cms-fame.gammacdn.com/c/minify/c9/65912b2679e997bbde94f588e7a2bb.css — 200 — 1.6 KiB — 29 ms — h2https://static01-cms-fame.gammacdn.com/c/minify/fc/5b9b448d761b2ebbf94c7cd919bc77.cssstatic01-cms-fame.gammacdn.com/c/mi... https://static01-cms-fame.gammacdn.com/c/minify/fc/5b9b448d761b2ebbf94c7cd919bc77.css — 200 — 1.2 KiB — 31 ms — h2https://kosmos-prod.react.gammacdn.com/main.modern.a55b1bb9210948d9a92f.csskosmos-prod.react.gammacdn.com/main... https://kosmos-prod.react.gammacdn.com/main.modern.a55b1bb9210948d9a92f.css — 200 — 24.4 KiB — 12 ms — h2https://kosmos-prod.react.gammacdn.com/roccosiffredi.theme.modern.a55b1bb9210948d9a92f.csskosmos-prod.react.gammacdn.com/rocc... https://kosmos-prod.react.gammacdn.com/roccosiffredi.theme.modern.a55b1bb9210948d9a92f.css — 200 — 26.2 KiB — 12 ms — h2https://www.roccosiffredi.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.jswww.roccosiffredi.com/cdn-cgi/scrip... https://www.roccosiffredi.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js — 200 — 4.2 KiB — 29 ms — h2https://kosmos-prod.react.gammacdn.com/app.modern.a55b1bb9210948d9a92f.jskosmos-prod.react.gammacdn.com/app.... https://kosmos-prod.react.gammacdn.com/app.modern.a55b1bb9210948d9a92f.js — 200 — 426.1 KiB — 32 ms — h2https://static01-cms-fame.gammacdn.com/c/minify/1a/b8cdec795075c2b14a9bc140e294ee.jsstatic01-cms-fame.gammacdn.com/c/mi... https://static01-cms-fame.gammacdn.com/c/minify/1a/b8cdec795075c2b14a9bc140e294ee.js — 200 — 1.6 KiB — 9 ms — h2https://static01-cms-fame.gammacdn.com/c/minify/80/6628daca02f400be6ec1cae12b1bdf.jsstatic01-cms-fame.gammacdn.com/c/mi... https://static01-cms-fame.gammacdn.com/c/minify/80/6628daca02f400be6ec1cae12b1bdf.js — 200 — 34.4 KiB — 16 ms — h2https://kosmos-prod.react.gammacdn.com/react-dom-18-2-0-prod.jskosmos-prod.react.gammacdn.com/reac... https://kosmos-prod.react.gammacdn.com/react-dom-18-2-0-prod.js — 200 — 40.9 KiB — 26 ms — h2https://kosmos-prod.react.gammacdn.com/react-18-2-0-prod.jskosmos-prod.react.gammacdn.com/reac... https://kosmos-prod.react.gammacdn.com/react-18-2-0-prod.js — 200 — 4.5 KiB — 24 ms — h2https://kosmos-prod.react.gammacdn.com/lodash-4-17-2.jskosmos-prod.react.gammacdn.com/loda... https://kosmos-prod.react.gammacdn.com/lodash-4-17-2.js — 200 — 26.1 KiB — 26 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TWVMJ48www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TWVMJ48 — 200 — 127.5 KiB — 154 ms — h2https://static01-cms-fame.gammacdn.com/roccosiffredi/m/d8tjoauecnsckg8c/favicon-16x16.pngstatic01-cms-fame.gammacdn.com/rocc... https://static01-cms-fame.gammacdn.com/roccosiffredi/m/d8tjoauecnsckg8c/favicon-16x16.png — 200 — 2.8 KiB — 5 ms — h2https://static01-cms-buddies.gammacdn.com/evilangel/m/cs4y2tri7s0gggo0/Lato-Regular.woff2static01-cms-buddies.gammacdn.com/e... 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https://kosmos-prod.react.gammacdn.com/component-BenefitsList.0a0591e8b0e85ffab3b2.css — 200 — 1.4 KiB — 11 ms — h2https://kosmos-prod.react.gammacdn.com/component-BenefitsList.modern.395eed225446cf29b9de.jskosmos-prod.react.gammacdn.com/comp... https://kosmos-prod.react.gammacdn.com/component-BenefitsList.modern.395eed225446cf29b9de.js — 200 — 1.7 KiB — 15 ms — h2https://kosmos-prod.react.gammacdn.com/component-ImageGrid.7d5bf2dc61075873b1b7.csskosmos-prod.react.gammacdn.com/comp... https://kosmos-prod.react.gammacdn.com/component-ImageGrid.7d5bf2dc61075873b1b7.css — 200 — 899 B — 11 ms — h2https://kosmos-prod.react.gammacdn.com/component-ImageGrid.modern.d11a3916555e14d1146c.jskosmos-prod.react.gammacdn.com/comp... https://kosmos-prod.react.gammacdn.com/component-ImageGrid.modern.d11a3916555e14d1146c.js — 200 — 1.7 KiB — 15 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/FPk3Cqjf4bQgwQBNzXOPX/77507d7987630c1552bea029d8752cd7/Rocco_800x450_SFW2.jpg?width=1350&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/FPk3Cqjf4bQgwQBNzXOPX/77507d7987630c1552bea029d8752cd7/Rocco_800x450_SFW2.jpg?width=1350&format=webp — 200 — 47.7 KiB — 893 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/7sBa6w24Dw0pZ498lALF7n/8fa540cc1ee01ca7205303583eec2ee5/Rocco_400x600_SFW1.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/7sBa6w24Dw0pZ498lALF7n/8fa540cc1ee01ca7205303583eec2ee5/Rocco_400x600_SFW1.jpg?width=700&format=webp — 200 — 34.2 KiB — 598 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/4ipgLjPhY2VDU80846bps/86d492bfed805ae25c8c89b9d1edec04/Rocco_400x600_SFW3.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/4ipgLjPhY2VDU80846bps/86d492bfed805ae25c8c89b9d1edec04/Rocco_400x600_SFW3.jpg?width=700&format=webp — 200 — 37.6 KiB — 661 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/5ZqwbPNo1ZQjjRV1sPpGLR/6c5d954b00555f75af7918a51bf5591e/Rocco_800x450_SFW4.jpg?width=1350&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/5ZqwbPNo1ZQjjRV1sPpGLR/6c5d954b00555f75af7918a51bf5591e/Rocco_800x450_SFW4.jpg?width=1350&format=webp — 200 — 41.0 KiB — 674 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/36w2mmlyw1nrYsoVNV6sfo/2fe3b77a5f96c129741d55ab1792f1d4/Rocco_400x600_SFW6.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/36w2mmlyw1nrYsoVNV6sfo/2fe3b77a5f96c129741d55ab1792f1d4/Rocco_400x600_SFW6.jpg?width=700&format=webp — 200 — 49.6 KiB — 49 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/5PuDvk6crf1NaXPWzbPziz/f771b4663e8686a542637c7a5f614f42/Rocco_400x600_SFW8.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/5PuDvk6crf1NaXPWzbPziz/f771b4663e8686a542637c7a5f614f42/Rocco_400x600_SFW8.jpg?width=700&format=webp — 200 — 30.5 KiB — 643 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/531ASNVf3DTf5ZedLgogdh/d9bbc16d66ac11b0207b9f1d84ba863a/Rocco_800x450_SFW7.jpg?width=1350&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/531ASNVf3DTf5ZedLgogdh/d9bbc16d66ac11b0207b9f1d84ba863a/Rocco_800x450_SFW7.jpg?width=1350&format=webp — 200 — 64.4 KiB — 647 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/ijxElqaKbQBiaO64SbZik/845b03bc4a681179eeb98db9bb443ef9/Rocco_400x600_SFW7.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/ijxElqaKbQBiaO64SbZik/845b03bc4a681179eeb98db9bb443ef9/Rocco_400x600_SFW7.jpg?width=700&format=webp — 200 — 32.4 KiB — 638 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/4xgD9oP8Kb2tzzrOezoR2p/5b149a23adf9a4ef095feabb681e2c1d/Rocco_400x600_SFW2.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/4xgD9oP8Kb2tzzrOezoR2p/5b149a23adf9a4ef095feabb681e2c1d/Rocco_400x600_SFW2.jpg?width=700&format=webp — 200 — 57.0 KiB — 625 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/7g3BZa9XsoEu0uDNieH5F8/696622aed437253ef95ad5d03020c2bd/Rocco_800x450_SFW3.jpg?width=1350&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/7g3BZa9XsoEu0uDNieH5F8/696622aed437253ef95ad5d03020c2bd/Rocco_800x450_SFW3.jpg?width=1350&format=webp — 200 — 49.2 KiB — 764 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/2Prg29QE4Vy2jJpQO0tZQ7/14f32e262e8af6568e792bb14df4ec75/Rocco_400x600_SFW4.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/2Prg29QE4Vy2jJpQO0tZQ7/14f32e262e8af6568e792bb14df4ec75/Rocco_400x600_SFW4.jpg?width=700&format=webp — 200 — 41.6 KiB — 607 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/2IUjEONTq64TX6bbO6rQiC/ff14b1e5e20b97891cf37820ad652ee3/Rocco_400x600_SFW12.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/2IUjEONTq64TX6bbO6rQiC/ff14b1e5e20b97891cf37820ad652ee3/Rocco_400x600_SFW12.jpg?width=700&format=webp — 200 — 78.6 KiB — 676 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/373v0jNwkwZf05JoH63tQk/85958db630b436a78caba761b7815340/Rocco_800x450_SFW8.jpg?width=1350&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/373v0jNwkwZf05JoH63tQk/85958db630b436a78caba761b7815340/Rocco_800x450_SFW8.jpg?width=1350&format=webp — 200 — 28.3 KiB — 646 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/73C7v9XZs8dTGkNwTf4bN2/1776308052563d556499677d536c8344/Rocco_400x600_SFW10.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/73C7v9XZs8dTGkNwTf4bN2/1776308052563d556499677d536c8344/Rocco_400x600_SFW10.jpg?width=700&format=webp — 200 — 40.5 KiB — 592 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/V560JNY0yC1FORsqGgqUX/963708e768272f2f375195a210a0b270/Rocco_400x600_SFW13.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/V560JNY0yC1FORsqGgqUX/963708e768272f2f375195a210a0b270/Rocco_400x600_SFW13.jpg?width=700&format=webp — 200 — 61.4 KiB — 621 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/2M1o8LgPcB57LXWhwtQpGS/603685c03edc8be5cb631964643a2ac5/Rocco_800x450_SFW1.jpg?width=1350&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/2M1o8LgPcB57LXWhwtQpGS/603685c03edc8be5cb631964643a2ac5/Rocco_800x450_SFW1.jpg?width=1350&format=webp — 200 — 73.7 KiB — 686 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/egeOuqEyWoMYn8nFsGJOX/10250aa5dce798730635fbcff7617641/Rocco_400x600_SFW14.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/egeOuqEyWoMYn8nFsGJOX/10250aa5dce798730635fbcff7617641/Rocco_400x600_SFW14.jpg?width=700&format=webp — 200 — 40.9 KiB — 781 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/71sB2qwyEwyNY9662QXmmm/7a556e8ae7413cdf9e6b69b1b15bd3d0/Rocco_400x600_SFW15.jpg?width=700&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/71sB2qwyEwyNY9662QXmmm/7a556e8ae7413cdf9e6b69b1b15bd3d0/Rocco_400x600_SFW15.jpg?width=700&format=webp — 200 — 57.6 KiB — 586 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/3IZYsDsz0WDH6FeFyoNXQx/7fe3d9136836cb989fe429bf60055ab8/Rocco_SFW_Lander.jpg?width=1350&height=492&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/3IZYsDsz0WDH6FeFyoNXQx/7fe3d9136836cb989fe429bf60055ab8/Rocco_SFW_Lander.jpg?width=1350&height=492&format=webp — 200 — 63.0 KiB — 620 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/5ZqwbPNo1ZQjjRV1sPpGLR/6c5d954b00555f75af7918a51bf5591e/Rocco_800x450_SFW4.jpg?width=450&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/5ZqwbPNo1ZQjjRV1sPpGLR/6c5d954b00555f75af7918a51bf5591e/Rocco_800x450_SFW4.jpg?width=450&format=webp — 200 — 10.9 KiB — 510 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/531ASNVf3DTf5ZedLgogdh/d9bbc16d66ac11b0207b9f1d84ba863a/Rocco_800x450_SFW7.jpg?width=450&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/531ASNVf3DTf5ZedLgogdh/d9bbc16d66ac11b0207b9f1d84ba863a/Rocco_800x450_SFW7.jpg?width=450&format=webp — 200 — 18.1 KiB — 519 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/36w2mmlyw1nrYsoVNV6sfo/2fe3b77a5f96c129741d55ab1792f1d4/Rocco_400x600_SFW6.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/36w2mmlyw1nrYsoVNV6sfo/2fe3b77a5f96c129741d55ab1792f1d4/Rocco_400x600_SFW6.jpg?width=250&format=webp — 200 — 12.4 KiB — 461 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/5PuDvk6crf1NaXPWzbPziz/f771b4663e8686a542637c7a5f614f42/Rocco_400x600_SFW8.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/5PuDvk6crf1NaXPWzbPziz/f771b4663e8686a542637c7a5f614f42/Rocco_400x600_SFW8.jpg?width=250&format=webp — 200 — 9.1 KiB — 686 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/ijxElqaKbQBiaO64SbZik/845b03bc4a681179eeb98db9bb443ef9/Rocco_400x600_SFW7.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/ijxElqaKbQBiaO64SbZik/845b03bc4a681179eeb98db9bb443ef9/Rocco_400x600_SFW7.jpg?width=250&format=webp — 200 — 9.8 KiB — 502 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/4xgD9oP8Kb2tzzrOezoR2p/5b149a23adf9a4ef095feabb681e2c1d/Rocco_400x600_SFW2.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/4xgD9oP8Kb2tzzrOezoR2p/5b149a23adf9a4ef095feabb681e2c1d/Rocco_400x600_SFW2.jpg?width=250&format=webp — 200 — 15.4 KiB — 496 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/373v0jNwkwZf05JoH63tQk/85958db630b436a78caba761b7815340/Rocco_800x450_SFW8.jpg?width=450&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/373v0jNwkwZf05JoH63tQk/85958db630b436a78caba761b7815340/Rocco_800x450_SFW8.jpg?width=450&format=webp — 200 — 7.6 KiB — 508 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/2M1o8LgPcB57LXWhwtQpGS/603685c03edc8be5cb631964643a2ac5/Rocco_800x450_SFW1.jpg?width=450&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/2M1o8LgPcB57LXWhwtQpGS/603685c03edc8be5cb631964643a2ac5/Rocco_800x450_SFW1.jpg?width=450&format=webp — 200 — 15.5 KiB — 533 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/73C7v9XZs8dTGkNwTf4bN2/1776308052563d556499677d536c8344/Rocco_400x600_SFW10.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/73C7v9XZs8dTGkNwTf4bN2/1776308052563d556499677d536c8344/Rocco_400x600_SFW10.jpg?width=250&format=webp — 200 — 12.5 KiB — 33 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/V560JNY0yC1FORsqGgqUX/963708e768272f2f375195a210a0b270/Rocco_400x600_SFW13.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/V560JNY0yC1FORsqGgqUX/963708e768272f2f375195a210a0b270/Rocco_400x600_SFW13.jpg?width=250&format=webp — 200 — 18.9 KiB — 485 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/egeOuqEyWoMYn8nFsGJOX/10250aa5dce798730635fbcff7617641/Rocco_400x600_SFW14.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/egeOuqEyWoMYn8nFsGJOX/10250aa5dce798730635fbcff7617641/Rocco_400x600_SFW14.jpg?width=250&format=webp — 200 — 13.1 KiB — 520 ms — h2https://transform.gammacdn.com/5mtb3zfzz1y7/71sB2qwyEwyNY9662QXmmm/7a556e8ae7413cdf9e6b69b1b15bd3d0/Rocco_400x600_SFW15.jpg?width=250&format=webptransform.gammacdn.com/5mtb3zfzz1y7... https://transform.gammacdn.com/5mtb3zfzz1y7/71sB2qwyEwyNY9662QXmmm/7a556e8ae7413cdf9e6b69b1b15bd3d0/Rocco_400x600_SFW15.jpg?width=250&format=webp — 200 — 16.2 KiB — 501 ms — h2https://ctf-images.gammacdn.com/cdyxtpbavd4i/clAOhYmjkifHtwIWhfaGO/c10ffdc9567d6c802caff8dac88601f9/Worldcup2026_Promobar_Organic_Desktop_50Off_copy.jpgctf-images.gammacdn.com/cdyxtpbavd4... https://ctf-images.gammacdn.com/cdyxtpbavd4i/clAOhYmjkifHtwIWhfaGO/c10ffdc9567d6c802caff8dac88601f9/Worldcup2026_Promobar_Organic_Desktop_50Off_copy.jpg — 200 — 94.2 KiB — 15 ms — h2https://kosmos-assets-prod.react.gammacdn.com/site/roccosiffredi/icon/Clear.svgkosmos-assets-prod.react.gammacdn.c... https://kosmos-assets-prod.react.gammacdn.com/site/roccosiffredi/icon/Clear.svg — 200 — 1.1 KiB — 3 ms — h2https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 145 ms — http/1.1https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 124 ms — http/1.1https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 122 ms — http/1.1https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 121 ms — http/1.1https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 124 ms — http/1.1https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 133 ms — http/1.1https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 176 ms — http/1.1https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event2aed6ghjsb4436qtebuqk3gfzq0xeauy.la... https://2aed6ghjsb4436qtebuqk3gfzq0xeauy.lambda-url.us-east-1.on.aws/chug/event — 200 — 340 B — 177 ms — http/1.1https://cdn.izooto.com/scripts/sdk/izextf.jscdn.izooto.com/scripts/sdk/izextf.j... https://cdn.izooto.com/scripts/sdk/izextf.js — 200 — 12.3 KiB — 35 ms — h3https://www.gstatic.com/firebasejs/10.13.2/firebase-app-compat.jswww.gstatic.com/firebasejs/10.13.2/... https://www.gstatic.com/firebasejs/10.13.2/firebase-app-compat.js — 200 — 10.4 KiB — 86 ms — h2https://www.gstatic.com/firebasejs/10.13.2/firebase-messaging-compat.jswww.gstatic.com/firebasejs/10.13.2/... https://www.gstatic.com/firebasejs/10.13.2/firebase-messaging-compat.js — 200 — 9.9 KiB — 33 ms — h2https://sbp.izooto.com/nblksbp.izooto.com/nblk https://sbp.izooto.com/nblk — 200 — 408 B — 223 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
85% of JavaScript execution is third-party
First-party Third-party 967ms · 707KB · $13/mo
kosmos-prod.react.gammacdn.com
Other
Costly
Execution 405ms
Transfer 4 KB
Monthly Cost $5/mo
kosmos-prod.react.gammacdn.com
Other
Costly
Execution 231ms
Transfer 426 KB
Unused 55%
Monthly Cost $3/mo
www.roccosiffredi.com
Other
Optional
Execution 84ms
Transfer 17 KB
Monthly Cost $1/mo
www.roccosiffredi.com
Other
Optional
Execution 82ms
Transfer 4 KB
Monthly Cost $1/mo
kosmos-prod.react.gammacdn.com
Other
Optional
Execution 58ms
Transfer 32 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 56ms
Transfer 128 KB
Unused 49%
Monthly Cost $1/mo
cdn.izooto.com
Other
Optional
Execution 50ms
Transfer 96 KB
Unused 66%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • kosmos-prod.react.gammacdn.com adds 405ms and costs ~$5/month
  • kosmos-prod.react.gammacdn.com adds 231ms and costs ~$3/month

85% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

kosmos-prod.react.gammacdn.com takes 405ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

kosmos-prod.react.gammacdn.com takes 231ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

55% of kosmos-prod.react.gammacdn.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

66% of cdn.izooto.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

Image Optimization
24 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

24

Total Size

0 KB

Oversized

4

13 missing dimensions 8 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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