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Performance

· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
4
REVIEW
6
PASS
9
INFO
4

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

Mobile Desktop
86
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
100
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.

709 ms

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

2.54 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.

0.048

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

709 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.72 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
23
9 PASS 6 REVIEW 4 FIX
F
Page Weight Budget
Action
4.8 MB transferred, 31 requests
FIX
4.8 MB transferred, 31 requests
Critical::
Page weighs 5.5 MB (4.8 MB transferred)
Warning::
Images are 4.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.4 MB
Info::
31 HTTP requests
Info::
Estimated 1.0 g CO2 per page load
4.8 MB / 2.4 MB budget
4.8 MB transferred
31 requests
1.0 g CO2 per page load
Images 4.4 MiB 93%
JavaScript 231.6 KiB 5%
Fonts 69.0 KiB 1%
Other 20.1 KiB 0%
HTML 19.5 KiB 0%
CSS 15.9 KiB 0%
Other 88 B 0%
Other 83 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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 (4.8 MiB of 4.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
31 resources · 4.8 MB · 84 KB savings available
FIX
31 resources · 4.8 MB · 84 KB savings available
Warning::
Page weight 4.8 MB exceeds 1 MB target by 3.8 MB
Got: 4.8 MB Expected: ≤ 1 MB
Info::
~84 KB of savings available
Warning::
30 third-party resources (100% of weight)
Info::
4 resources over 200KB
31 resources · 4.8 MiB · 30 third-party 3.8 MiB over 1MB target
Image 93% · 4.5 MiB
JavaScript 5% · 231.6 KiB
Font 1% · 69.0 KiB
Document 0% · 19.5 KiB
CSS 0% · 15.9 KiB
Other 0% · 601 B

~84.4 KiB of savings available

Remove unused JavaScript: 84.4 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
4 images, 0 KB saveable
REVIEW
4 images, 0 KB saveable
Warning::
https://carenav360.co.uk/site-assets/c6cfbb3247016... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
4 images 4.4 MB
0 oversized -0 KB
4 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

B
JS Bundles
18 scripts, 84 KB unused
REVIEW
18 scripts, 84 KB unused
Warning::
https://carenav360.co.uk/assets/index-D7C3lAlR.js: 84 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 84 KB
84 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://carenav360.co.uk/assets/index-D7C3lAlR.js141 KB84 KB (60%)✓3rd
https://carenav360.co.uk/assets/useSelector-DkBAF1WU.js4 KB—✓3rd
https://carenav360.co.uk/assets/createServerFn-1WoW48TW.js12 KB—✓3rd
https://carenav360.co.uk/assets/not-found-i5RsCZif.js0 KB—✓3rd
https://carenav360.co.uk/assets/link-CPJiyNmS.js4 KB—✓3rd
https://carenav360.co.uk/assets/matchContext-Du47noOv.js0 KB—✓3rd
https://carenav360.co.uk/assets/insights.queries-Bvmec2YC.js3 KB—✓3rd
https://carenav360.co.uk/assets/auth-middleware-DJfY6zCa.js5 KB—✓3rd
https://carenav360.co.uk/assets/routes-CnMdSXee.js5 KB—✓3rd
https://carenav360.co.uk/assets/button-U6DvjyZ7.js10 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

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
Document Compression
Action
Document response served uncompressed
REVIEW
Document 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+
JS Execution Cost
152ms total JS execution
PASS
152ms total JS execution
Info::
https://carenav360.co.uk/: 92ms CPU time
Info::
Unattributable: 61ms CPU time
Warning::
Third-party scripts: 92ms (60% of total)

Main Thread Breakdown

Other 40% Script Evaluation 26% Style & Layout 26% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://carenav360.co.uk/92ms2ms1ms3rd
Unattributable61ms1ms0ms1st
A+
Font Loading
2 fonts (69 KB)
PASS
2 fonts (69 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

69 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 709 ms LCP 2.5 shttps://carenav360.co.uk/site-assets/c5608cd43f7692ba.woff2c5608cd43f7692ba.woff2 https://carenav360.co.uk/site-assets/c5608cd43f7692ba.woff2 — 44.7 KiB — 65 ms — font-display: swaphttps://carenav360.co.uk/site-assets/860b963c07166768.woff2860b963c07166768.woff2 https://carenav360.co.uk/site-assets/860b963c07166768.woff2 — 24.3 KiB — 54 ms — font-display: swap
c5608cd43f7692ba.woff2 woff2 swap
Size 45 KB
Load time 65 ms
Start 496 ms
Risk FOUT — text flashes from fallback to web font
860b963c07166768.woff2 woff2 swap
Size 24 KB
Load time 54 ms
Start 496 ms
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

Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
31 requests over 865ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 709 ms LCP 2.5 shttps://www.carenav360.co.uk// https://www.carenav360.co.uk/ — 302 — 430 B — 92 ms — h2https://carenav360.co.uk/carenav360.co.uk/ https://carenav360.co.uk/ — 200 — 19.5 KiB — 174 ms — h2https://carenav360.co.uk/site-assets/c6cfbb324701640c.pngcarenav360.co.uk/site-assets/c6cfbb... https://carenav360.co.uk/site-assets/c6cfbb324701640c.png — 200 — 888.6 KiB — 151 ms — h2https://carenav360.co.uk/site-assets/25e1f5208db3c07d.pngcarenav360.co.uk/site-assets/25e1f5... https://carenav360.co.uk/site-assets/25e1f5208db3c07d.png — 200 — 985.4 KiB — 175 ms — h2https://carenav360.co.uk/assets/styles-2Q0iL9XB.csscarenav360.co.uk/assets/styles-2Q0i... https://carenav360.co.uk/assets/styles-2Q0iL9XB.css — 200 — 13.2 KiB — 113 ms — h2https://carenav360.co.uk/assets/index-BPcuF8oP.csscarenav360.co.uk/assets/index-BPcuF... https://carenav360.co.uk/assets/index-BPcuF8oP.css — 200 — 2.7 KiB — 175 ms — h2https://carenav360.co.uk/assets/index-D7C3lAlR.jscarenav360.co.uk/assets/index-D7C3l... https://carenav360.co.uk/assets/index-D7C3lAlR.js — 200 — 140.8 KiB — 130 ms — h2https://carenav360.co.uk/assets/useSelector-DkBAF1WU.jscarenav360.co.uk/assets/useSelector... https://carenav360.co.uk/assets/useSelector-DkBAF1WU.js — 200 — 4.0 KiB — 60 ms — h2https://carenav360.co.uk/assets/createServerFn-1WoW48TW.jscarenav360.co.uk/assets/createServe... https://carenav360.co.uk/assets/createServerFn-1WoW48TW.js — 200 — 11.9 KiB — 134 ms — h2https://carenav360.co.uk/assets/not-found-i5RsCZif.jscarenav360.co.uk/assets/not-found-i... https://carenav360.co.uk/assets/not-found-i5RsCZif.js — 200 — 165 B — 125 ms — h2https://carenav360.co.uk/assets/link-CPJiyNmS.jscarenav360.co.uk/assets/link-CPJiyN... https://carenav360.co.uk/assets/link-CPJiyNmS.js — 200 — 4.2 KiB — 59 ms — h2https://carenav360.co.uk/assets/matchContext-Du47noOv.jscarenav360.co.uk/assets/matchContex... https://carenav360.co.uk/assets/matchContext-Du47noOv.js — 200 — 198 B — 178 ms — h2https://carenav360.co.uk/assets/insights.queries-Bvmec2YC.jscarenav360.co.uk/assets/insights.qu... https://carenav360.co.uk/assets/insights.queries-Bvmec2YC.js — 200 — 3.4 KiB — 124 ms — h2https://carenav360.co.uk/assets/auth-middleware-DJfY6zCa.jscarenav360.co.uk/assets/auth-middle... https://carenav360.co.uk/assets/auth-middleware-DJfY6zCa.js — 200 — 5.3 KiB — 121 ms — h2https://carenav360.co.uk/assets/routes-CnMdSXee.jscarenav360.co.uk/assets/routes-CnMd... https://carenav360.co.uk/assets/routes-CnMdSXee.js — 200 — 5.0 KiB — 63 ms — h2https://carenav360.co.uk/assets/button-U6DvjyZ7.jscarenav360.co.uk/assets/button-U6Dv... https://carenav360.co.uk/assets/button-U6DvjyZ7.js — 200 — 10.2 KiB — 123 ms — h2https://carenav360.co.uk/assets/site-DRaneqvf.jscarenav360.co.uk/assets/site-DRaneq... https://carenav360.co.uk/assets/site-DRaneqvf.js — 200 — 11.6 KiB — 62 ms — h2https://carenav360.co.uk/assets/site-navigation-links-BE2_nyLI.jscarenav360.co.uk/assets/site-naviga... https://carenav360.co.uk/assets/site-navigation-links-BE2_nyLI.js — 200 — 399 B — 123 ms — h2https://carenav360.co.uk/assets/use-recruitment-form-D65rsLfB.jscarenav360.co.uk/assets/use-recruit... https://carenav360.co.uk/assets/use-recruitment-form-D65rsLfB.js — 200 — 1.6 KiB — 123 ms — h2https://carenav360.co.uk/site-assets/6eebc7bbe4cccf0e.pngcarenav360.co.uk/site-assets/6eebc7... https://carenav360.co.uk/site-assets/6eebc7bbe4cccf0e.png — 200 — 1.3 MiB — 189 ms — h2https://carenav360.co.uk/site-assets/43c916f24970289f.pngcarenav360.co.uk/site-assets/43c916... https://carenav360.co.uk/site-assets/43c916f24970289f.png — 200 — 1.3 MiB — 252 ms — h2https://carenav360.co.uk/~flock.jscarenav360.co.uk/~flock.js https://carenav360.co.uk/~flock.js — 200 — 8.2 KiB — 66 ms — h2https://carenav360.co.uk/__l5e/events.270c78a44fc53e7b.jscarenav360.co.uk/__l5e/events.270c7... https://carenav360.co.uk/__l5e/events.270c78a44fc53e7b.js — 200 — 11.6 KiB — 57 ms — h2https://carenav360.co.uk/site-assets/c5608cd43f7692ba.woff2carenav360.co.uk/site-assets/c5608c... https://carenav360.co.uk/site-assets/c5608cd43f7692ba.woff2 — 200 — 44.7 KiB — 65 ms — h2https://carenav360.co.uk/site-assets/860b963c07166768.woff2carenav360.co.uk/site-assets/860b96... https://carenav360.co.uk/site-assets/860b963c07166768.woff2 — 200 — 24.3 KiB — 54 ms — h2https://carenav360.co.uk/assets/useNavigate-BG3k2vpV.jscarenav360.co.uk/assets/useNavigate... https://carenav360.co.uk/assets/useNavigate-BG3k2vpV.js — 200 — 227 B — 52 ms — h2https://carenav360.co.uk/assets/types-Cu22YDvm.jscarenav360.co.uk/assets/types-Cu22Y... https://carenav360.co.uk/assets/types-Cu22YDvm.js — 200 — 12.5 KiB — 55 ms — h2https://carenav360.co.uk/assets/useServerFn-Dv5I4j1f.jscarenav360.co.uk/assets/useServerFn... https://carenav360.co.uk/assets/useServerFn-Dv5I4j1f.js — 200 — 331 B — 51 ms — h2https://carenav360.co.uk/favicon.icocarenav360.co.uk/favicon.ico https://carenav360.co.uk/favicon.ico — 200 — 19.6 KiB — 51 ms — h2https://carenav360.co.uk/__l5e/trackeventscarenav360.co.uk/__l5e/trackevents https://carenav360.co.uk/__l5e/trackevents — 202 — 88 B — 50 ms — h2
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 709 ms LCP 2.5 shttps://www.carenav360.co.uk// https://www.carenav360.co.uk/ — 302 — 430 B — 92 ms — h2https://carenav360.co.uk/carenav360.co.uk/ https://carenav360.co.uk/ — 200 — 19.5 KiB — 174 ms — h2https://carenav360.co.uk/site-assets/c6cfbb324701640c.pngcarenav360.co.uk/site-assets/c6cfbb... https://carenav360.co.uk/site-assets/c6cfbb324701640c.png — 200 — 888.6 KiB — 151 ms — h2https://carenav360.co.uk/site-assets/25e1f5208db3c07d.pngcarenav360.co.uk/site-assets/25e1f5... https://carenav360.co.uk/site-assets/25e1f5208db3c07d.png — 200 — 985.4 KiB — 175 ms — h2https://carenav360.co.uk/assets/styles-2Q0iL9XB.csscarenav360.co.uk/assets/styles-2Q0i... https://carenav360.co.uk/assets/styles-2Q0iL9XB.css — 200 — 13.2 KiB — 113 ms — h2https://carenav360.co.uk/assets/index-BPcuF8oP.csscarenav360.co.uk/assets/index-BPcuF... https://carenav360.co.uk/assets/index-BPcuF8oP.css — 200 — 2.7 KiB — 175 ms — h2https://carenav360.co.uk/assets/index-D7C3lAlR.jscarenav360.co.uk/assets/index-D7C3l... https://carenav360.co.uk/assets/index-D7C3lAlR.js — 200 — 140.8 KiB — 130 ms — h2https://carenav360.co.uk/assets/useSelector-DkBAF1WU.jscarenav360.co.uk/assets/useSelector... https://carenav360.co.uk/assets/useSelector-DkBAF1WU.js — 200 — 4.0 KiB — 60 ms — h2https://carenav360.co.uk/assets/createServerFn-1WoW48TW.jscarenav360.co.uk/assets/createServe... https://carenav360.co.uk/assets/createServerFn-1WoW48TW.js — 200 — 11.9 KiB — 134 ms — h2https://carenav360.co.uk/assets/not-found-i5RsCZif.jscarenav360.co.uk/assets/not-found-i... https://carenav360.co.uk/assets/not-found-i5RsCZif.js — 200 — 165 B — 125 ms — h2https://carenav360.co.uk/assets/link-CPJiyNmS.jscarenav360.co.uk/assets/link-CPJiyN... https://carenav360.co.uk/assets/link-CPJiyNmS.js — 200 — 4.2 KiB — 59 ms — h2https://carenav360.co.uk/assets/matchContext-Du47noOv.jscarenav360.co.uk/assets/matchContex... https://carenav360.co.uk/assets/matchContext-Du47noOv.js — 200 — 198 B — 178 ms — h2https://carenav360.co.uk/assets/insights.queries-Bvmec2YC.jscarenav360.co.uk/assets/insights.qu... https://carenav360.co.uk/assets/insights.queries-Bvmec2YC.js — 200 — 3.4 KiB — 124 ms — h2https://carenav360.co.uk/assets/auth-middleware-DJfY6zCa.jscarenav360.co.uk/assets/auth-middle... https://carenav360.co.uk/assets/auth-middleware-DJfY6zCa.js — 200 — 5.3 KiB — 121 ms — h2https://carenav360.co.uk/assets/routes-CnMdSXee.jscarenav360.co.uk/assets/routes-CnMd... https://carenav360.co.uk/assets/routes-CnMdSXee.js — 200 — 5.0 KiB — 63 ms — h2https://carenav360.co.uk/assets/button-U6DvjyZ7.jscarenav360.co.uk/assets/button-U6Dv... https://carenav360.co.uk/assets/button-U6DvjyZ7.js — 200 — 10.2 KiB — 123 ms — h2https://carenav360.co.uk/assets/site-DRaneqvf.jscarenav360.co.uk/assets/site-DRaneq... https://carenav360.co.uk/assets/site-DRaneqvf.js — 200 — 11.6 KiB — 62 ms — h2https://carenav360.co.uk/assets/site-navigation-links-BE2_nyLI.jscarenav360.co.uk/assets/site-naviga... https://carenav360.co.uk/assets/site-navigation-links-BE2_nyLI.js — 200 — 399 B — 123 ms — h2https://carenav360.co.uk/assets/use-recruitment-form-D65rsLfB.jscarenav360.co.uk/assets/use-recruit... https://carenav360.co.uk/assets/use-recruitment-form-D65rsLfB.js — 200 — 1.6 KiB — 123 ms — h2https://carenav360.co.uk/site-assets/6eebc7bbe4cccf0e.pngcarenav360.co.uk/site-assets/6eebc7... https://carenav360.co.uk/site-assets/6eebc7bbe4cccf0e.png — 200 — 1.3 MiB — 189 ms — h2https://carenav360.co.uk/site-assets/43c916f24970289f.pngcarenav360.co.uk/site-assets/43c916... https://carenav360.co.uk/site-assets/43c916f24970289f.png — 200 — 1.3 MiB — 252 ms — h2https://carenav360.co.uk/~flock.jscarenav360.co.uk/~flock.js https://carenav360.co.uk/~flock.js — 200 — 8.2 KiB — 66 ms — h2https://carenav360.co.uk/__l5e/events.270c78a44fc53e7b.jscarenav360.co.uk/__l5e/events.270c7... https://carenav360.co.uk/__l5e/events.270c78a44fc53e7b.js — 200 — 11.6 KiB — 57 ms — h2https://carenav360.co.uk/site-assets/c5608cd43f7692ba.woff2carenav360.co.uk/site-assets/c5608c... https://carenav360.co.uk/site-assets/c5608cd43f7692ba.woff2 — 200 — 44.7 KiB — 65 ms — h2https://carenav360.co.uk/site-assets/860b963c07166768.woff2carenav360.co.uk/site-assets/860b96... https://carenav360.co.uk/site-assets/860b963c07166768.woff2 — 200 — 24.3 KiB — 54 ms — h2https://carenav360.co.uk/assets/useNavigate-BG3k2vpV.jscarenav360.co.uk/assets/useNavigate... https://carenav360.co.uk/assets/useNavigate-BG3k2vpV.js — 200 — 227 B — 52 ms — h2https://carenav360.co.uk/assets/types-Cu22YDvm.jscarenav360.co.uk/assets/types-Cu22Y... https://carenav360.co.uk/assets/types-Cu22YDvm.js — 200 — 12.5 KiB — 55 ms — h2https://carenav360.co.uk/assets/useServerFn-Dv5I4j1f.jscarenav360.co.uk/assets/useServerFn... https://carenav360.co.uk/assets/useServerFn-Dv5I4j1f.js — 200 — 331 B — 51 ms — h2https://carenav360.co.uk/favicon.icocarenav360.co.uk/favicon.ico https://carenav360.co.uk/favicon.ico — 200 — 19.6 KiB — 51 ms — h2https://carenav360.co.uk/__l5e/trackeventscarenav360.co.uk/__l5e/trackevents https://carenav360.co.uk/__l5e/trackevents — 202 — 88 B — 50 ms — h2https://carenav360.co.uk/~api/analyticscarenav360.co.uk/~api/analytics https://carenav360.co.uk/~api/analytics — 202 — 83 B — 38 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
60% of JavaScript execution is third-party
First-party Third-party 92ms · 20KB · £1/mo
carenav360.co.uk
Other
Optional
Execution 92ms
Transfer 20 KB
Monthly Cost £1/mo

60% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

How third-party costs are calculated

Image Optimization
4 images, 4537 KB total, 876 KB wasted
INFO

Image Optimization Audit

Total Images

4

Total Size

4537 KB

Oversized

1

Wasted

876 KB

4 missing dimensions 3 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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