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https://m4center.store

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
1
REVIEW
3
PASS
15
INFO
3

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

931 ms

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

971 ms

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.

0.005

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

931 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.

971 ms

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
22
15 PASS 3 REVIEW 1 FIX
D
Third-Party Impact
Action
86% third-party, 0 ms blocking
FIX
86% third-party, 0 ms blocking
Warning::
Third-party code accounts for 86% of page weight (769.0 KiB of 897.3 KiB)
Info::
Third-party blocking time is low (0 ms)
86%
First-party Third-party
B
Image Optimization
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Warning::
https://m4center.store/brand/logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9 images 652 KB
0 oversized -0 KB
9 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 Execution Cost
617ms total JS execution
REVIEW
617ms total JS execution
Warning::
https://m4center.store/: 320ms CPU time
Info::
https://m4center.store/cdn-cgi/challenge-platform/...: 112ms CPU time
Info::
https://m4center.store/build/assets/app-CSU5A2x0.j...: 100ms CPU time
Info::
Unattributable: 84ms CPU time

Main Thread Breakdown

Script Evaluation 34% Other 31% Style & Layout 28% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://m4center.store/320ms26ms1ms1st
https://m4center.store/cdn-cgi/challenge-platform/scripts/jsd/main.js?ray=a56669528907e99d112ms98ms1ms1st
https://m4center.store/build/assets/app-CSU5A2x0.js100ms71ms0ms1st
Unattributable84ms4ms0ms1st
B
HTTP Caching
no-cache, private
REVIEW
no-cache, private
Info::
Cache-Control header is set
Got: no-cache, private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, private

DirectiveValueMeaning
no-cache—Cache but always revalidate first
private—Only browser cache, not CDN/proxy
A
Page Weight Budget
897 KB transferred, 27 requests
PASS
897 KB transferred, 27 requests
Info::
Page weighs 1.1 MB (897 KB transferred)
Info::
27 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
897 KB / 2.4 MB budget
897 KB transferred
27 requests
0.18 g CO2 per page load
Images 652.1 KiB 73%
JavaScript 116.5 KiB 13%
Fonts 106.4 KiB 12%
CSS 10.5 KiB 1%
Other 6.0 KiB 1%
HTML 3.2 KiB 0%
Other 1.5 KiB 0%
Other 1.0 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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 (106 KB)
PASS
5 fonts (106 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

106 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 500 ms 1.0 s FCP 931 ms LCP 971 mshttps://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B47b1z3bWuYMBYro.woff2HTxwL3I-JCGChYJ8VI-L6OO... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B47b1z3bWuYMBYro.woff2 — 14.4 KiB — 47 ms — font-display: swaphttps://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2SLXVc1nY6HkvangtZmpQdkh... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2 — 30.0 KiB — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B46r2z3bWuYMBYro.woff2HTxwL3I-JCGChYJ8VI-L6OO... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B46r2z3bWuYMBYro.woff2 — 14.6 KiB — 57 ms — font-display: swaphttps://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2SLXVc1nY6HkvangtZmpQdkh... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2 — 32.9 KiB — 84 ms — font-display: swaphttps://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B4873z3bWuYMBYro.woff2HTxwL3I-JCGChYJ8VI-L6OO... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B4873z3bWuYMBYro.woff2 — 14.5 KiB — 34 ms — font-display: swap
HTxwL3I-JCGChYJ8VI-L6OO... woff2 swap
Size 14 KB
Load time 47 ms
Start 428 ms
Risk FOUT — text flashes from fallback to web font
SLXVc1nY6HkvangtZmpQdkh... woff2 swap
Size 30 KB
Load time 77 ms
Start 428 ms
Risk FOUT — text flashes from fallback to web font
HTxwL3I-JCGChYJ8VI-L6OO... woff2 swap
Size 15 KB
Load time 57 ms
Start 429 ms
Risk FOUT — text flashes from fallback to web font
SLXVc1nY6HkvangtZmpQdkh... woff2 swap
Size 33 KB
Load time 84 ms
Start 429 ms
Risk FOUT — text flashes from fallback to web font
HTxwL3I-JCGChYJ8VI-L6OO... woff2 swap
Size 15 KB
Load time 34 ms
Start 753 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+
JS Bundles
3 scripts, 36 KB unused
PASS
3 scripts, 36 KB unused
Warning::
https://m4center.store/build/assets/app-CSU5A2x0.j...: 36 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 36 KB
36 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://m4center.store/build/assets/app-CSU5A2x0.js89 KB36 KB (41%)✓1st
https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d8730179208881409210 KB—✓3rd
https://m4center.store/cdn-cgi/challenge-platform/h/b/scripts/jsd/8340802ab0bb/main.js?ray=a56669528907e99d18 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

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+
Document Compression
Document response uses brotli
PASS
Document 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-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache, private
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: 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
27 resources · 897 KB · 36 KB savings available
PASS
27 resources · 897 KB · 36 KB savings available
Info::
Within 1MB page-weight target
Got: 897 KB
Warning::
15 third-party resources (86% of weight)
27 resources · 897.3 KiB · 15 third-party Within 1MB page-weight target
Image 73% · 652.9 KiB
JavaScript 13% · 116.5 KiB
Font 12% · 106.4 KiB
CSS 1% · 10.5 KiB
Other 1% · 7.8 KiB
Document 0% · 3.2 KiB

~35.9 KiB of savings available

Remove unused JavaScript: 35.9 KiB
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
27 requests over 924ms
INFO
0 ms 500 ms 1.0 s FCP 931 ms LCP 971 mshttps://m4center.store// https://m4center.store/ — 200 — 3.2 KiB — 161 ms — h3https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700;800&family=Cairo:wght@400;600;700;800;900&display=swapfonts.googleapis.com/css2?family=Ba... https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700;800&family=Cairo:wght@400;600;700;800;900&display=swap — 200 — 1.4 KiB — 106 ms — h2https://m4center.store/build/assets/app-By2Icz4K.css/build/assets/app-By2Icz4K.css https://m4center.store/build/assets/app-By2Icz4K.css — 200 — 9.1 KiB — 41 ms — h3https://m4center.store/build/assets/app-CSU5A2x0.js/build/assets/app-CSU5A2x0.js https://m4center.store/build/assets/app-CSU5A2x0.js — 200 — 88.6 KiB — 54 ms — h3https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 — 200 — 10.2 KiB — 71 ms — h2https://m4center.store/cdn-cgi/challenge-platform/scripts/jsd/main.js?ray=a56669528907e99d/cdn-cgi/challenge-platform/scripts... https://m4center.store/cdn-cgi/challenge-platform/scripts/jsd/main.js?ray=a56669528907e99d — 302 — 237 B — 152 ms — h3https://m4center.store/brand/logo.svg/brand/logo.svg https://m4center.store/brand/logo.svg — 200 — 1.2 KiB — 41 ms — h3https://m4center.store/cdn-cgi/rum?/cdn-cgi/rum? https://m4center.store/cdn-cgi/rum? — 204 — 482 B — 35 ms — h3https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B47b1z3bWuYMBYro.woff2fonts.gstatic.com/s/barlowcondensed... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B47b1z3bWuYMBYro.woff2 — 200 — 14.4 KiB — 47 ms — h3https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2fonts.gstatic.com/s/cairo/v31/SLXVc... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2 — 200 — 30.0 KiB — 77 ms — h3https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B46r2z3bWuYMBYro.woff2fonts.gstatic.com/s/barlowcondensed... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B46r2z3bWuYMBYro.woff2 — 200 — 14.6 KiB — 57 ms — h3https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2fonts.gstatic.com/s/cairo/v31/SLXVc... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2 — 200 — 32.9 KiB — 84 ms — h3https://m4center.store/api/meta/api/meta https://m4center.store/api/meta — 200 — 1.8 KiB — 108 ms — h3https://m4center.store/api/products?featured=1&per_page=8/api/products?featured=1&per_page=8 https://m4center.store/api/products?featured=1&per_page=8 — 200 — 2.5 KiB — 120 ms — h3https://m4center.store/api/products?on_sale=1&per_page=4/api/products?on_sale=1&per_page=4 https://m4center.store/api/products?on_sale=1&per_page=4 — 200 — 1.7 KiB — 143 ms — h3https://m4center.store/cdn-cgi/challenge-platform/h/b/scripts/jsd/8340802ab0bb/main.js?ray=a56669528907e99d/cdn-cgi/challenge-platform/h/b/scr... https://m4center.store/cdn-cgi/challenge-platform/h/b/scripts/jsd/8340802ab0bb/main.js?ray=a56669528907e99d — 200 — 17.6 KiB — 23 ms — h3https://m4center.store/favicon.svg/favicon.svg https://m4center.store/favicon.svg — 200 — 835 B — 26 ms — h3https://m4center.store/cdn-cgi/challenge-platform/h/b/jsd/oneshot/8340802ab0bb/0.1194164701006043:1793988637:CObTEgH-cp_slcQxFIl1QpikXPhrPp8fz75eTfbFxLo/a56669528907e99d/cdn-cgi/challenge-platform/h/b/jsd... https://m4center.store/cdn-cgi/challenge-platform/h/b/jsd/oneshot/8340802ab0bb/0.1194164701006043:1793988637:CObTEgH-cp_slcQxFIl1QpikXPhrPp8fz75eTfbFxLo/a56669528907e99d — 200 — 1.0 KiB — 35 ms — h3https://cdn.m4center.store/products/1756512820_3N3C43MZ3YV8DVZ1CRBQ5KBDGS.jpgcdn.m4center.store/products/1756512... https://cdn.m4center.store/products/1756512820_3N3C43MZ3YV8DVZ1CRBQ5KBDGS.jpg — 200 — 68.7 KiB — 132 ms — h2https://cdn.m4center.store/products/1756511933_7YTRHA5W4WVNPDP0HWTSDAG0TQ.jpgcdn.m4center.store/products/1756511... https://cdn.m4center.store/products/1756511933_7YTRHA5W4WVNPDP0HWTSDAG0TQ.jpg — 200 — 96.9 KiB — 135 ms — h2https://cdn.m4center.store/products/1756516383_3YV70HF04EMBSDR40ZYPWAQYWT.jpgcdn.m4center.store/products/1756516... https://cdn.m4center.store/products/1756516383_3YV70HF04EMBSDR40ZYPWAQYWT.jpg — 200 — 89.1 KiB — 141 ms — h2https://cdn.m4center.store/products/1756512808_4C3DBANDWY98W4C1WR1GZ9E7HV.jpgcdn.m4center.store/products/1756512... https://cdn.m4center.store/products/1756512808_4C3DBANDWY98W4C1WR1GZ9E7HV.jpg — 200 — 94.3 KiB — 146 ms — h2https://cdn.m4center.store/products/1756511950_2SD701P1HB4DZEE48YKW14M6P7.jpgcdn.m4center.store/products/1756511... https://cdn.m4center.store/products/1756511950_2SD701P1HB4DZEE48YKW14M6P7.jpg — 200 — 46.4 KiB — 150 ms — h2https://cdn.m4center.store/products/1756511935_4EXD879XCCW4FMZ3ZJ6Z9FWA3T.jpgcdn.m4center.store/products/1756511... https://cdn.m4center.store/products/1756511935_4EXD879XCCW4FMZ3ZJ6Z9FWA3T.jpg — 200 — 80.8 KiB — 147 ms — h2https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B4873z3bWuYMBYro.woff2fonts.gstatic.com/s/barlowcondensed... https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B4873z3bWuYMBYro.woff2 — 200 — 14.5 KiB — 34 ms — h3https://cdn.m4center.store/products/1756511930_4G56KVNWKPK07116JSQMGHKBNV.jpgcdn.m4center.store/products/1756511... https://cdn.m4center.store/products/1756511930_4G56KVNWKPK07116JSQMGHKBNV.jpg — 200 — 90.5 KiB — 46 ms — h2https://cdn.m4center.store/products/1756511911_7ZPPAN3GMHYMGNPVBCAS12XY9Y.jpgcdn.m4center.store/products/1756511... https://cdn.m4center.store/products/1756511911_7ZPPAN3GMHYMGNPVBCAS12XY9Y.jpg — 200 — 84.3 KiB — 29 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
1 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

1

Total Size

0 KB

1 missing dimensions 1 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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