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Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
3
PASS
14
INFO
3

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

70
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
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.

646 ms

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

963 ms

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

738 ms

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

0.000

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

1.68 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.

2.48 s

Page Load Progression

1.1 s
2.1 s
3.2 s
4.2 s
5.3 s
6.3 s
7.4 s
8.4 s
Checks
22
14 PASS 3 REVIEW 2 FIX
D
JS Execution Cost
Action
3129ms total JS execution
FIX
3129ms total JS execution
Warning::
https://productshotai.app/: 876ms CPU time
Warning::
https://umami.bestvid.net/recorder.js: 706ms CPU time
Warning::
https://productshotai.app/_next/static/chunks/4bd1...: 420ms CPU time
Warning::
https://productshotai.app/_next/static/chunks/1255...: 349ms CPU time
Warning::
Unattributable: 282ms CPU time
Info::
Third-party scripts: 786ms (25% of total)

Main Thread Breakdown

Script Evaluation 46% Other 31% Style & Layout 13% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://productshotai.app/876ms45ms16ms1st
https://umami.bestvid.net/recorder.js706ms645ms6ms3rd
https://productshotai.app/_next/static/chunks/4bd1b696-f785427dddbba9fb.js420ms48ms6ms1st
https://productshotai.app/_next/static/chunks/1255-32f0b2a4c4d3a714.js349ms325ms9ms1st
Unattributable282ms47ms0ms1st
https://productshotai.app/_next/static/chunks/1274-9f866282c24598b3.js196ms18ms5ms1st
https://productshotai.app/cdn-cgi/challenge-platform/scripts/jsd/main.js133ms128ms1ms1st
https://productshotai.app/_next/static/chunks/webpack-87099ceb4a46d92a.js87ms87ms0ms1st
https://scripts.clarity.ms/0.8.69/clarity.js80ms67ms3ms3rd
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

DirectiveValueMeaning
privateOnly browser cache, not CDN/proxy
no-cacheCache but always revalidate first
no-storeNever cache this response
max-age0Cache for 0 seconds
must-revalidateMust recheck with server after expiry
B
Page Weight Budget
1.2 MB transferred, 105 requests
REVIEW
1.2 MB transferred, 105 requests
Info::
Page weighs 3.0 MB (1.2 MB transferred)
Warning::
JavaScript is 587 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 587 KB
Warning::
105 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.25 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
105 requests
0.25 g CO2 per page load
JavaScript 587.3 KiB 47%
Images 467.5 KiB 38%
Fonts 74.4 KiB 6%
HTML 45.9 KiB 4%
Other 36.8 KiB 3%
Other 28.0 KiB 2%
Other 1.9 KiB 0%
CSS 1.5 KiB 0%
Other 823 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

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

C
JS Bundles
Action
26 scripts, 180 KB unused
REVIEW
26 scripts, 180 KB unused
Warning::
https://accounts.google.com/gsi/client: 72 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-EB61...: 69 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://umami.bestvid.net/recorder.js: 38 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 180 KB
180 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://accounts.google.com/gsi/client97 KB72 KB (75%)3rd
https://www.googletagmanager.com/gtag/js?id=G-EB61P8TMB1168 KB69 KB (41%)3rd
https://umami.bestvid.net/recorder.js58 KB38 KB (67%)3rd
https://productshotai.app/_next/static/chunks/1839-c98fe4086448e41f.js5 KB1st
https://productshotai.app/_next/static/chunks/373-f60d03bb8d602460.js5 KB1st
https://productshotai.app/_next/static/chunks/4bd1b696-f785427dddbba9fb.js54 KB1st
https://productshotai.app/_next/static/chunks/1255-32f0b2a4c4d3a714.js44 KB1st
https://productshotai.app/_next/static/chunks/main-app-3f1cb8baf2b06fbe.js1 KB1st
https://productshotai.app/_next/static/chunks/6091-30a78ac1d17f693e.js13 KB1st
https://productshotai.app/_next/static/chunks/176-c399f18851485fd7.js4 KB1st

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

B
Page Weight Inventory
105 resources · 1.2 MB · 180 KB savings available
REVIEW
105 resources · 1.2 MB · 180 KB savings available
Warning::
Page weight 1.2 MB exceeds 1 MB target by 220 KB
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~180 KB of savings available
Info::
37 third-party resources (34% of weight)
105 resources · 1.2 MiB · 37 third-party 220.1 KiB over 1MB target
JavaScript 47% · 587.3 KiB
Image 40% · 501.7 KiB
Font 6% · 74.4 KiB
Document 4% · 45.9 KiB
Other 3% · 33.3 KiB
CSS 0% · 1.5 KiB

~179.8 KiB of savings available

Remove unused JavaScript: 179.8 KiB
A
Third-Party Impact
34% third-party, 0 ms blocking
PASS
34% third-party, 0 ms blocking
Info::
Third-party code accounts for 34% of page weight (417.8 KiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
66%
34%
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+
Image Optimization
32 images, 0 KB saveable
PASS
32 images, 0 KB saveable
Info::
All images are well-optimized
32 images 468 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (74 KB)
PASS
2 fonts (74 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

74 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 FCP 646 ms LCP 963 mshttps://productshotai.app/_next/static/media/313510e2713fb214-s.p.woff2313510e2713fb214-s.p.woff2 https://productshotai.app/_next/static/media/313510e2713fb214-s.p.woff2 — 34.3 KiB — 30 ms — font-display: swaphttps://productshotai.app/_next/static/media/bb3ef058b751a6ad-s.p.woff2bb3ef058b751a6ad-s.p.woff2 https://productshotai.app/_next/static/media/bb3ef058b751a6ad-s.p.woff2 — 40.0 KiB — 47 ms — font-display: swap
313510e2713fb214-s.p.woff2 woff2 swap
Size 34 KB
Load time 30 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
bb3ef058b751a6ad-s.p.woff2 woff2 swap
Size 40 KB
Load time 47 ms
Start 1.3 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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Compression Algorithm
Main response uses brotli
PASS
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: private, no-cache, no-store, max-age=0, must-revalidate
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch
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+
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
105 requests over 8129ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 646 ms LCP 963 mshttps://productshotai.app// https://productshotai.app/ — 200 — 45.9 KiB — 1.3 s — h3https://productshotai.app/_next/static/media/313510e2713fb214-s.p.woff2/_next/static/media/313510e2713fb21... https://productshotai.app/_next/static/media/313510e2713fb214-s.p.woff2 — 200 — 34.3 KiB — 30 ms — h3https://productshotai.app/_next/static/media/bb3ef058b751a6ad-s.p.woff2/_next/static/media/bb3ef058b751a6a... https://productshotai.app/_next/static/media/bb3ef058b751a6ad-s.p.woff2 — 200 — 40.0 KiB — 47 ms — h3https://productshotai.app/_next/static/css/0dfd11dc484b6a6b.css/_next/static/css/0dfd11dc484b6a6b.... https://productshotai.app/_next/static/css/0dfd11dc484b6a6b.css — 200 — 475 B — 46 ms — h3https://productshotai.app/_next/static/css/609758925b403088.css/_next/static/css/609758925b403088.... https://productshotai.app/_next/static/css/609758925b403088.css — 200 — 468 B — 69 ms — h3https://www.googletagmanager.com/gtag/js?id=G-EB61P8TMB1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-EB61P8TMB1 — 200 — 168.0 KiB — 309 ms — h2https://umami.bestvid.net/script.jsumami.bestvid.net/script.js https://umami.bestvid.net/script.js — 200 — 3.0 KiB — 63 ms — h3https://umami.bestvid.net/recorder.jsumami.bestvid.net/recorder.js https://umami.bestvid.net/recorder.js — 200 — 58.1 KiB — 115 ms — h3https://analytics.ahrefs.com/analytics.jsanalytics.ahrefs.com/analytics.js https://analytics.ahrefs.com/analytics.js — 200 — 3.0 KiB — 40 ms — h3https://productshotai.app/images/productshot/hero-showcase/artisan-candles.webp/images/productshot/hero-showcase/a... https://productshotai.app/images/productshot/hero-showcase/artisan-candles.webp — 200 — 0 B — 2 ms — h3https://productshotai.app/logo.webp/logo.webp https://productshotai.app/logo.webp — 200 — 482 B — 117 ms — h3https://productshotai.app/logos/productshot-brands/google.webp/logos/productshot-brands/google.we... https://productshotai.app/logos/productshot-brands/google.webp — 200 — 0 B — 48 ms — h3https://productshotai.app/logos/productshot-brands/openai.webp/logos/productshot-brands/openai.we... https://productshotai.app/logos/productshot-brands/openai.webp — 200 — 0 B — 48 ms — h3https://productshotai.app/logos/productshot-brands/googlegemini.webp/logos/productshot-brands/googlegem... https://productshotai.app/logos/productshot-brands/googlegemini.webp — 200 — 0 B — 48 ms — h3https://productshotai.app/logos/productshot-brands/stripe.webp/logos/productshot-brands/stripe.we... https://productshotai.app/logos/productshot-brands/stripe.webp — 200 — 0 B — 53 ms — h3https://productshotai.app/logos/productshot-brands/cloudflare.webp/logos/productshot-brands/cloudflar... https://productshotai.app/logos/productshot-brands/cloudflare.webp — 200 — 0 B — 62 ms — h3https://productshotai.app/logos/productshot-brands/shopify.webp/logos/productshot-brands/shopify.w... https://productshotai.app/logos/productshot-brands/shopify.webp — 200 — 0 B — 65 ms — h3https://productshotai.app/logos/productshot-brands/amazon.webp/logos/productshot-brands/amazon.we... https://productshotai.app/logos/productshot-brands/amazon.webp — 200 — 1.6 KiB — 45 ms — h3https://productshotai.app/_next/static/chunks/webpack-87099ceb4a46d92a.js/_next/static/chunks/webpack-87099c... https://productshotai.app/_next/static/chunks/webpack-87099ceb4a46d92a.js — 200 — 2.4 KiB — 59 ms — h3https://productshotai.app/_next/static/chunks/4bd1b696-f785427dddbba9fb.js/_next/static/chunks/4bd1b696-f7854... https://productshotai.app/_next/static/chunks/4bd1b696-f785427dddbba9fb.js — 200 — 53.8 KiB — 112 ms — h3https://productshotai.app/_next/static/chunks/1255-32f0b2a4c4d3a714.js/_next/static/chunks/1255-32f0b2a4c... https://productshotai.app/_next/static/chunks/1255-32f0b2a4c4d3a714.js — 200 — 44.2 KiB — 110 ms — h3https://productshotai.app/_next/static/chunks/main-app-3f1cb8baf2b06fbe.js/_next/static/chunks/main-app-3f1cb... https://productshotai.app/_next/static/chunks/main-app-3f1cb8baf2b06fbe.js — 200 — 701 B — 61 ms — h3https://productshotai.app/_next/static/chunks/6091-30a78ac1d17f693e.js/_next/static/chunks/6091-30a78ac1d... https://productshotai.app/_next/static/chunks/6091-30a78ac1d17f693e.js — 200 — 12.9 KiB — 93 ms — h3https://productshotai.app/_next/static/chunks/176-c399f18851485fd7.js/_next/static/chunks/176-c399f18851... https://productshotai.app/_next/static/chunks/176-c399f18851485fd7.js — 200 — 4.0 KiB — 63 ms — h3https://productshotai.app/_next/static/chunks/1356-e0431919f9b272a7.js/_next/static/chunks/1356-e0431919f... https://productshotai.app/_next/static/chunks/1356-e0431919f9b272a7.js — 200 — 5.7 KiB — 83 ms — h3https://productshotai.app/_next/static/chunks/6199-69bf43d3f1b562f8.js/_next/static/chunks/6199-69bf43d3f... https://productshotai.app/_next/static/chunks/6199-69bf43d3f1b562f8.js — 200 — 2.8 KiB — 62 ms — h3https://productshotai.app/_next/static/chunks/1839-c98fe4086448e41f.js/_next/static/chunks/1839-c98fe4086... https://productshotai.app/_next/static/chunks/1839-c98fe4086448e41f.js — 200 — 4.6 KiB — 58 ms — h3https://productshotai.app/_next/static/chunks/9678-233d08bfdcf98150.js/_next/static/chunks/9678-233d08bfd... https://productshotai.app/_next/static/chunks/9678-233d08bfdcf98150.js — 200 — 9.4 KiB — 60 ms — h3https://productshotai.app/_next/static/chunks/373-f60d03bb8d602460.js/_next/static/chunks/373-f60d03bb8d... https://productshotai.app/_next/static/chunks/373-f60d03bb8d602460.js — 200 — 5.3 KiB — 104 ms — h3https://productshotai.app/_next/static/chunks/1274-9f866282c24598b3.js/_next/static/chunks/1274-9f866282c... https://productshotai.app/_next/static/chunks/1274-9f866282c24598b3.js — 200 — 22.8 KiB — 75 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 646 ms LCP 963 mshttps://productshotai.app// https://productshotai.app/ — 200 — 45.9 KiB — 1.3 s — h3https://productshotai.app/_next/static/media/313510e2713fb214-s.p.woff2/_next/static/media/313510e2713fb21... https://productshotai.app/_next/static/media/313510e2713fb214-s.p.woff2 — 200 — 34.3 KiB — 30 ms — h3https://productshotai.app/_next/static/media/bb3ef058b751a6ad-s.p.woff2/_next/static/media/bb3ef058b751a6a... https://productshotai.app/_next/static/media/bb3ef058b751a6ad-s.p.woff2 — 200 — 40.0 KiB — 47 ms — h3https://productshotai.app/_next/static/css/0dfd11dc484b6a6b.css/_next/static/css/0dfd11dc484b6a6b.... https://productshotai.app/_next/static/css/0dfd11dc484b6a6b.css — 200 — 475 B — 46 ms — h3https://productshotai.app/_next/static/css/609758925b403088.css/_next/static/css/609758925b403088.... https://productshotai.app/_next/static/css/609758925b403088.css — 200 — 468 B — 69 ms — h3https://www.googletagmanager.com/gtag/js?id=G-EB61P8TMB1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-EB61P8TMB1 — 200 — 168.0 KiB — 309 ms — h2https://umami.bestvid.net/script.jsumami.bestvid.net/script.js https://umami.bestvid.net/script.js — 200 — 3.0 KiB — 63 ms — h3https://umami.bestvid.net/recorder.jsumami.bestvid.net/recorder.js https://umami.bestvid.net/recorder.js — 200 — 58.1 KiB — 115 ms — h3https://analytics.ahrefs.com/analytics.jsanalytics.ahrefs.com/analytics.js https://analytics.ahrefs.com/analytics.js — 200 — 3.0 KiB — 40 ms — h3https://productshotai.app/images/productshot/hero-showcase/artisan-candles.webp/images/productshot/hero-showcase/a... https://productshotai.app/images/productshot/hero-showcase/artisan-candles.webp — 200 — 0 B — 2 ms — h3https://productshotai.app/logo.webp/logo.webp https://productshotai.app/logo.webp — 200 — 482 B — 117 ms — 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https://umami.bestvid.net/api/record — -1 — 0 B — 712 ms — https://umami.bestvid.net/api/recordumami.bestvid.net/api/record https://umami.bestvid.net/api/record — 429 — 0 B — 706 ms — h3https://umami.bestvid.net/api/recordumami.bestvid.net/api/record https://umami.bestvid.net/api/record — 200 — 750 B — 969 ms — h3https://productshotai.app/images/productshot/hero-showcase/ceramic-coffee-dripper.webp/images/productshot/hero-showcase/c... https://productshotai.app/images/productshot/hero-showcase/ceramic-coffee-dripper.webp — 200 — 25.2 KiB — 17 ms — h3https://umami.bestvid.net/api/recordumami.bestvid.net/api/record https://umami.bestvid.net/api/record — -1 — 0 B — 187 ms — https://productshotai.app/images/productshot/hero-showcase/linen-shirt.webp/images/productshot/hero-showcase/l... https://productshotai.app/images/productshot/hero-showcase/linen-shirt.webp — 200 — 26.3 KiB — 16 ms — h3https://umami.bestvid.net/api/recordumami.bestvid.net/api/record https://umami.bestvid.net/api/record — 200 — 750 B — 204 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
25% of JavaScript execution is third-party
First-party Third-party 786ms · 83KB · €4/mo
umami.bestvid.net
Other
Costly
Execution 706ms
Transfer 58 KB
Unused 67%
Monthly Cost €4/mo
Microsoft Clarity
Session Replay
Optional
Execution 80ms
Transfer 25 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • umami.bestvid.net adds 706ms and costs ~€4/month

umami.bestvid.net takes 706ms 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

67% of umami.bestvid.net'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
119 images, 1281 KB total, 467 KB wasted
INFO

Image Optimization Audit

Total Images

119

Total Size

1281 KB

Oversized

29

Wasted

467 KB

68 missing dimensions 16 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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