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https://aicshop.anticimex.com

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
8
PASS
14
INFO
3

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

Mobile Desktop
68
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
42
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.

3.86 s

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

6.06 s

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

90 ms

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

0.004

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

4.14 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.

6.08 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
26
14 PASS 8 REVIEW 1 FIX
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
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Warning::
https://aicshop.anticimex.com/images/logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9 images 45 KB
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

C
JS Execution Cost
Action
1295ms total JS execution
REVIEW
1295ms total JS execution
Warning::
Unattributable: 633ms CPU time
Warning::
https://aicshop.anticimex.com/: 301ms CPU time
Warning::
https://aicshop.anticimex.com/_nuxt/RazOOpXa.js: 259ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-NPN...: 102ms CPU time
Warning::
Third-party scripts: 735ms (57% of total)

Main Thread Breakdown

Script Evaluation 51% Other 29% Style & Layout 9% Parse HTML & CSS 6%
ScriptTotalScriptingParse/CompileParty
Unattributable633ms345ms0ms3rd
https://aicshop.anticimex.com/301ms95ms2ms1st
https://aicshop.anticimex.com/_nuxt/RazOOpXa.js259ms178ms3ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-NPN2B7G2102ms77ms22ms3rd
C
JS Bundles
Action
80 scripts, 188 KB unused
REVIEW
80 scripts, 188 KB unused
Warning::
https://aicshop.anticimex.com/_nuxt/RazOOpXa.js: 124 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NPN...: 64 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 188 KB
188 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://aicshop.anticimex.com/_nuxt/RazOOpXa.js234 KB124 KB (53%)✓1st
https://www.googletagmanager.com/gtm.js?id=GTM-NPN2B7G2116 KB64 KB (56%)✓3rd
https://aicshop.anticimex.com/_nuxt/DJ3mNEl3.js0 KB—✓1st
https://aicshop.anticimex.com/_nuxt/fz0PryWe.js1 KB—✓1st
https://aicshop.anticimex.com/_nuxt/D0M7f08U.js9 KB—✓1st
https://aicshop.anticimex.com/_nuxt/UbtjZav2.js1 KB—✓1st
https://aicshop.anticimex.com/_nuxt/DDcNs8xy.js1 KB—✓1st
https://aicshop.anticimex.com/_nuxt/CLHrrWNw.js1 KB—✓1st
https://aicshop.anticimex.com/_nuxt/DhA_ToQb.js1 KB—✓1st
https://aicshop.anticimex.com/_nuxt/DgDUIzgb.js7 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

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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
808 KB transferred, 106 requests
PASS
808 KB transferred, 106 requests
Info::
Page weighs 1.8 MB (808 KB transferred)
Warning::
106 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.17 g CO2 per page load
808 KB / 2.4 MB budget
808 KB transferred
106 requests
0.17 g CO2 per page load
JavaScript 462.5 KiB 57%
Other 244.8 KiB 30%
Images 45.2 KiB 6%
HTML 43.0 KiB 5%
CSS 7.1 KiB 1%
Other 5.7 KiB 1%
0 2.4 MB 4.9 MB
Under budget

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

A
Third-Party Impact
23% third-party, 0 ms blocking
PASS
23% third-party, 0 ms blocking
Info::
Third-party code accounts for 23% of page weight (186.2 KiB of 808.2 KiB)
Info::
Third-party blocking time is low (0 ms)
77%
23%
First-party Third-party
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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
31 hints, 0 missing preconnects
PASS
31 hints, 0 missing preconnects
Info::
Page uses 31 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
+20
30

31 resource hints configured

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
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
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 Inventory
106 resources · 808 KB · 188 KB savings available
PASS
106 resources · 808 KB · 188 KB savings available
Info::
Within 1MB page-weight target
Got: 808 KB
Info::
~188 KB of savings available
Info::
11 third-party resources (23% of weight)
Info::
1 resources over 200KB
106 resources · 808.2 KiB · 11 third-party Within 1MB page-weight target
JavaScript 73% · 593.1 KiB
Image 20% · 158.9 KiB
Document 5% · 43.0 KiB
CSS 1% · 7.1 KiB
Other 1% · 6.0 KiB

~188.0 KiB of savings available

Remove unused JavaScript: 188.0 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
11 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 Waterfall
106 requests over 1643ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.9 s LCP 6.1 shttps://aicshop.anticimex.com// https://aicshop.anticimex.com/ — 200 — 40.0 KiB — 460 ms — h2https://aicshop.anticimex.com/_nuxt/entry.B2s5CRHM.css/_nuxt/entry.B2s5CRHM.css https://aicshop.anticimex.com/_nuxt/entry.B2s5CRHM.css — 200 — 1.7 KiB — 146 ms — h2https://aicshop.anticimex.com/_nuxt/Icon.DEqmdEP0.css/_nuxt/Icon.DEqmdEP0.css https://aicshop.anticimex.com/_nuxt/Icon.DEqmdEP0.css — 200 — 310 B — 77 ms — h2https://aicshop.anticimex.com/_nuxt/default.rV6t_gDI.css/_nuxt/default.rV6t_gDI.css https://aicshop.anticimex.com/_nuxt/default.rV6t_gDI.css — 200 — 1.0 KiB — 146 ms — h2https://aicshop.anticimex.com/_nuxt/PageRenderer.IMm0MSF4.css/_nuxt/PageRenderer.IMm0MSF4.css https://aicshop.anticimex.com/_nuxt/PageRenderer.IMm0MSF4.css — 200 — 766 B — 75 ms — h2https://aicshop.anticimex.com/_nuxt/ResponsivePicture.D0d0WNgd.css/_nuxt/ResponsivePicture.D0d0WNgd.c... https://aicshop.anticimex.com/_nuxt/ResponsivePicture.D0d0WNgd.css — 200 — 406 B — 161 ms — h2https://aicshop.anticimex.com/_nuxt/ProductGridItem.BEb0yB6I.css/_nuxt/ProductGridItem.BEb0yB6I.css https://aicshop.anticimex.com/_nuxt/ProductGridItem.BEb0yB6I.css — 200 — 307 B — 79 ms — h2https://aicshop.anticimex.com/_nuxt/AddToCart.Br0-ZJeD.css/_nuxt/AddToCart.Br0-ZJeD.css https://aicshop.anticimex.com/_nuxt/AddToCart.Br0-ZJeD.css — 200 — 718 B — 145 ms — h2https://aicshop.anticimex.com/_nuxt/RazOOpXa.js/_nuxt/RazOOpXa.js https://aicshop.anticimex.com/_nuxt/RazOOpXa.js — 200 — 233.7 KiB — 229 ms — h2https://aicshop.anticimex.com/_nuxt/DJ3mNEl3.js/_nuxt/DJ3mNEl3.js https://aicshop.anticimex.com/_nuxt/DJ3mNEl3.js — 200 — 373 B — 160 ms — h2https://aicshop.anticimex.com/_nuxt/fz0PryWe.js/_nuxt/fz0PryWe.js https://aicshop.anticimex.com/_nuxt/fz0PryWe.js — 200 — 921 B — 80 ms — h2https://aicshop.anticimex.com/_nuxt/D0M7f08U.js/_nuxt/D0M7f08U.js https://aicshop.anticimex.com/_nuxt/D0M7f08U.js — 200 — 9.0 KiB — 145 ms — h2https://aicshop.anticimex.com/_nuxt/UbtjZav2.js/_nuxt/UbtjZav2.js https://aicshop.anticimex.com/_nuxt/UbtjZav2.js — 200 — 1.4 KiB — 82 ms — h2https://aicshop.anticimex.com/_nuxt/DDcNs8xy.js/_nuxt/DDcNs8xy.js https://aicshop.anticimex.com/_nuxt/DDcNs8xy.js — 200 — 757 B — 144 ms — h2https://aicshop.anticimex.com/_nuxt/CLHrrWNw.js/_nuxt/CLHrrWNw.js https://aicshop.anticimex.com/_nuxt/CLHrrWNw.js — 200 — 800 B — 83 ms — h2https://aicshop.anticimex.com/_nuxt/DhA_ToQb.js/_nuxt/DhA_ToQb.js https://aicshop.anticimex.com/_nuxt/DhA_ToQb.js — 200 — 521 B — 144 ms — h2https://aicshop.anticimex.com/_nuxt/DgDUIzgb.js/_nuxt/DgDUIzgb.js https://aicshop.anticimex.com/_nuxt/DgDUIzgb.js — 200 — 7.2 KiB — 91 ms — h2https://aicshop.anticimex.com/_nuxt/DzTuJx8f.js/_nuxt/DzTuJx8f.js https://aicshop.anticimex.com/_nuxt/DzTuJx8f.js — 200 — 616 B — 143 ms — h2https://aicshop.anticimex.com/_nuxt/DLEJpERr.js/_nuxt/DLEJpERr.js https://aicshop.anticimex.com/_nuxt/DLEJpERr.js — 200 — 1.5 KiB — 85 ms — h2https://aicshop.anticimex.com/_nuxt/CzNxKEOK.js/_nuxt/CzNxKEOK.js https://aicshop.anticimex.com/_nuxt/CzNxKEOK.js — 200 — 2.5 KiB — 166 ms — h2https://aicshop.anticimex.com/_nuxt/B9PM5eFv.js/_nuxt/B9PM5eFv.js https://aicshop.anticimex.com/_nuxt/B9PM5eFv.js — 200 — 1.9 KiB — 145 ms — h2https://aicshop.anticimex.com/_nuxt/D4OKfGHq.js/_nuxt/D4OKfGHq.js https://aicshop.anticimex.com/_nuxt/D4OKfGHq.js — 200 — 330 B — 162 ms — h2https://aicshop.anticimex.com/_nuxt/D31BQylb.js/_nuxt/D31BQylb.js https://aicshop.anticimex.com/_nuxt/D31BQylb.js — 200 — 945 B — 147 ms — h2https://aicshop.anticimex.com/_nuxt/KfGFgSf2.js/_nuxt/KfGFgSf2.js https://aicshop.anticimex.com/_nuxt/KfGFgSf2.js — 200 — 4.3 KiB — 185 ms — h2https://aicshop.anticimex.com/_nuxt/CqjUMje7.js/_nuxt/CqjUMje7.js https://aicshop.anticimex.com/_nuxt/CqjUMje7.js — 200 — 310 B — 150 ms — h2https://aicshop.anticimex.com/_nuxt/CrqUMTuj.js/_nuxt/CrqUMTuj.js https://aicshop.anticimex.com/_nuxt/CrqUMTuj.js — 200 — 1004 B — 162 ms — h2https://aicshop.anticimex.com/_nuxt/DvmESMtB.js/_nuxt/DvmESMtB.js https://aicshop.anticimex.com/_nuxt/DvmESMtB.js — 200 — 6.4 KiB — 152 ms — h2https://aicshop.anticimex.com/_nuxt/BlY8nsWh.js/_nuxt/BlY8nsWh.js https://aicshop.anticimex.com/_nuxt/BlY8nsWh.js — 200 — 2.0 KiB — 185 ms — h2https://aicshop.anticimex.com/_nuxt/DMbU644m.js/_nuxt/DMbU644m.js https://aicshop.anticimex.com/_nuxt/DMbU644m.js — 200 — 1.4 KiB — 154 ms — h2https://aicshop.anticimex.com/_nuxt/BTGS_HQS.js/_nuxt/BTGS_HQS.js https://aicshop.anticimex.com/_nuxt/BTGS_HQS.js — 200 — 870 B — 161 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.9 s LCP 6.1 shttps://aicshop.anticimex.com// https://aicshop.anticimex.com/ — 200 — 40.0 KiB — 460 ms — h2https://aicshop.anticimex.com/_nuxt/entry.B2s5CRHM.css/_nuxt/entry.B2s5CRHM.css https://aicshop.anticimex.com/_nuxt/entry.B2s5CRHM.css — 200 — 1.7 KiB — 146 ms — h2https://aicshop.anticimex.com/_nuxt/Icon.DEqmdEP0.css/_nuxt/Icon.DEqmdEP0.css https://aicshop.anticimex.com/_nuxt/Icon.DEqmdEP0.css — 200 — 310 B — 77 ms — h2https://aicshop.anticimex.com/_nuxt/default.rV6t_gDI.css/_nuxt/default.rV6t_gDI.css https://aicshop.anticimex.com/_nuxt/default.rV6t_gDI.css — 200 — 1.0 KiB — 146 ms — h2https://aicshop.anticimex.com/_nuxt/PageRenderer.IMm0MSF4.css/_nuxt/PageRenderer.IMm0MSF4.css https://aicshop.anticimex.com/_nuxt/PageRenderer.IMm0MSF4.css — 200 — 766 B — 75 ms — h2https://aicshop.anticimex.com/_nuxt/ResponsivePicture.D0d0WNgd.css/_nuxt/ResponsivePicture.D0d0WNgd.c... https://aicshop.anticimex.com/_nuxt/ResponsivePicture.D0d0WNgd.css — 200 — 406 B — 161 ms — h2https://aicshop.anticimex.com/_nuxt/ProductGridItem.BEb0yB6I.css/_nuxt/ProductGridItem.BEb0yB6I.css https://aicshop.anticimex.com/_nuxt/ProductGridItem.BEb0yB6I.css — 200 — 307 B — 79 ms — h2https://aicshop.anticimex.com/_nuxt/AddToCart.Br0-ZJeD.css/_nuxt/AddToCart.Br0-ZJeD.css https://aicshop.anticimex.com/_nuxt/AddToCart.Br0-ZJeD.css — 200 — 718 B — 145 ms — h2https://aicshop.anticimex.com/_nuxt/RazOOpXa.js/_nuxt/RazOOpXa.js https://aicshop.anticimex.com/_nuxt/RazOOpXa.js — 200 — 233.7 KiB — 229 ms — h2https://aicshop.anticimex.com/_nuxt/DJ3mNEl3.js/_nuxt/DJ3mNEl3.js https://aicshop.anticimex.com/_nuxt/DJ3mNEl3.js — 200 — 373 B — 160 ms — h2https://aicshop.anticimex.com/_nuxt/fz0PryWe.js/_nuxt/fz0PryWe.js https://aicshop.anticimex.com/_nuxt/fz0PryWe.js — 200 — 921 B — 80 ms — h2https://aicshop.anticimex.com/_nuxt/D0M7f08U.js/_nuxt/D0M7f08U.js https://aicshop.anticimex.com/_nuxt/D0M7f08U.js — 200 — 9.0 KiB — 145 ms — h2https://aicshop.anticimex.com/_nuxt/UbtjZav2.js/_nuxt/UbtjZav2.js https://aicshop.anticimex.com/_nuxt/UbtjZav2.js — 200 — 1.4 KiB — 82 ms — h2https://aicshop.anticimex.com/_nuxt/DDcNs8xy.js/_nuxt/DDcNs8xy.js https://aicshop.anticimex.com/_nuxt/DDcNs8xy.js — 200 — 757 B — 144 ms — h2https://aicshop.anticimex.com/_nuxt/CLHrrWNw.js/_nuxt/CLHrrWNw.js https://aicshop.anticimex.com/_nuxt/CLHrrWNw.js — 200 — 800 B — 83 ms — h2https://aicshop.anticimex.com/_nuxt/DhA_ToQb.js/_nuxt/DhA_ToQb.js https://aicshop.anticimex.com/_nuxt/DhA_ToQb.js — 200 — 521 B — 144 ms — h2https://aicshop.anticimex.com/_nuxt/DgDUIzgb.js/_nuxt/DgDUIzgb.js https://aicshop.anticimex.com/_nuxt/DgDUIzgb.js — 200 — 7.2 KiB — 91 ms — h2https://aicshop.anticimex.com/_nuxt/DzTuJx8f.js/_nuxt/DzTuJx8f.js https://aicshop.anticimex.com/_nuxt/DzTuJx8f.js — 200 — 616 B — 143 ms — h2https://aicshop.anticimex.com/_nuxt/DLEJpERr.js/_nuxt/DLEJpERr.js https://aicshop.anticimex.com/_nuxt/DLEJpERr.js — 200 — 1.5 KiB — 85 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
57% of JavaScript execution is third-party
First-party Third-party 735ms · 116KB · €8/mo
Unattributable
Other
Costly
Execution 633ms
Transfer 0 KB
Monthly Cost €7/mo
Google Tag Manager
Tag Manager
Optional
Execution 102ms
Transfer 116 KB
Unused 56%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 633ms and costs ~€7/month

57% 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

Unattributable takes 633ms 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

56% of Google Tag Manager'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
10 images, 7 KB total, 1 KB wasted
INFO

Image Optimization Audit

Total Images

10

Total Size

7 KB

Oversized

5

Wasted

1 KB

2 missing alt text 8 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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