Skip to content
https://juvel.pages.dev

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
94
GRADE
A
FIX
1
REVIEW
3
PASS
19
INFO
3

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

Mobile Desktop
79
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.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

2.85 s

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

4.57 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.

0.000

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

2.85 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.

4.57 s

Page Load Progression

544 ms
1.1 s
1.6 s
2.2 s
2.7 s
3.3 s
3.8 s
4.4 s
Checks
26
19 PASS 3 REVIEW 1 FIX
F
JS Execution Cost
Action
3619ms total JS execution
FIX
3619ms total JS execution
Warning::
https://juvel.pages.dev/: 3350ms CPU time
Warning::
Unattributable: 270ms CPU time

Main Thread Breakdown

Other 38% Style & Layout 31% Script Evaluation 21% Rendering 7%
ScriptTotalScriptingParse/CompileParty
https://juvel.pages.dev/3350ms755ms77ms1st
Unattributable270ms10ms0ms1st
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

B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
500 KB transferred, 15 requests
PASS
500 KB transferred, 15 requests
Info::
Page weighs 1.2 MB (500 KB transferred)
Info::
15 HTTP requests
Info::
Estimated 0.10 g CO2 per page load
500 KB / 2.4 MB budget
500 KB transferred
15 requests
0.10 g CO2 per page load
HTML 248.6 KiB 50%
Images 184.4 KiB 37%
Fonts 59.9 KiB 12%
Other 5.5 KiB 1%
CSS 1.2 KiB 0%
Other 438 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
13% third-party, 0 ms blocking
PASS
13% third-party, 0 ms blocking
Info::
Third-party code accounts for 13% of page weight (66.5 KiB of 500.0 KiB)
Info::
Third-party blocking time is low (0 ms)
87%
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
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 184 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
6 fonts (60 KB)
PASS
6 fonts (60 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

60 KB total

Render-blocking

0

of 6

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 4.0 s FCP 2.8 s LCP 4.6 shttps://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l7KmHrRpiZtK6GwN9w.woff2Iurf6YBj_oCad4k1l7KmHrR... https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l7KmHrRpiZtK6GwN9w.woff2 — 8.5 KiB — 49 ms — font-display: swaphttps://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzGBC5xLhLE.woff2Iura6YBj_oCad4k1nzGBC5x... https://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzGBC5xLhLE.woff2 — 10.0 KiB — 36 ms — font-display: swaphttps://fonts.gstatic.com/s/marcellus/v14/wEO_EBrOk8hQLDvIAF81VvoK_kgXiQ.woff2wEO_EBrOk8hQLDvIAF81Vvo... https://fonts.gstatic.com/s/marcellus/v14/wEO_EBrOk8hQLDvIAF81VvoK_kgXiQ.woff2 — 14.0 KiB — 54 ms — font-display: swaphttps://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrRpiZtK6GwN9w.woff2Iurf6YBj_oCad4k1l4qkHrR... https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrRpiZtK6GwN9w.woff2 — 8.9 KiB — 39 ms — font-display: swaphttps://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzSBC5xLhLFw4Q.woff2Iura6YBj_oCad4k1nzSBC5x... https://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzSBC5xLhLFw4Q.woff2 — 8.7 KiB — 47 ms — font-display: swaphttps://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrFpiZtK6Gw.woff2Iurf6YBj_oCad4k1l4qkHrF... https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrFpiZtK6Gw.woff2 — 9.8 KiB — 29 ms — font-display: swap
Iurf6YBj_oCad4k1l7KmHrR... woff2 swap
Size 9 KB
Load time 49 ms
Start 318 ms
Risk FOUT — text flashes from fallback to web font
Iura6YBj_oCad4k1nzGBC5x... woff2 swap
Size 10 KB
Load time 36 ms
Start 318 ms
Risk FOUT — text flashes from fallback to web font
wEO_EBrOk8hQLDvIAF81Vvo... woff2 swap
Size 14 KB
Load time 54 ms
Start 318 ms
Risk FOUT — text flashes from fallback to web font
Iurf6YBj_oCad4k1l4qkHrR... woff2 swap
Size 9 KB
Load time 39 ms
Start 318 ms
Risk FOUT — text flashes from fallback to web font
Iura6YBj_oCad4k1nzSBC5x... woff2 swap
Size 9 KB
Load time 47 ms
Start 318 ms
Risk FOUT — text flashes from fallback to web font
Iurf6YBj_oCad4k1l4qkHrF... woff2 swap
Size 10 KB
Load time 29 ms
Start 319 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
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
2
preload
1
dns-prefetch
—
prefetch
—

3 resource hints configured

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 max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
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
15 resources · 500 KB · 0 KB savings available
PASS
15 resources · 500 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 500 KB
Info::
11 third-party resources (13% of weight)
Info::
1 resources over 200KB
15 resources · 500.0 KiB · 11 third-party Within 1MB page-weight target
Document 50% · 248.6 KiB
Image 37% · 184.9 KiB
Font 12% · 59.9 KiB
Other 1% · 5.5 KiB
CSS 0% · 1.2 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
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
Total JS execution time is 3.6 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
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
15 requests over 2040ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.8 s LCP 4.6 shttps://juvel.pages.dev// https://juvel.pages.dev/ — 200 — 248.6 KiB — 169 ms — h2https://juvel.pages.dev/images/hero.webp/images/hero.webp https://juvel.pages.dev/images/hero.webp — 200 — 104.6 KiB — 73 ms — h2https://fonts.googleapis.com/css2?family=Tajawal:wght@400;700;900&family=Marcellus&display=swapfonts.googleapis.com/css2?family=Ta... https://fonts.googleapis.com/css2?family=Tajawal:wght@400;700;900&family=Marcellus&display=swap — 200 — 1.2 KiB — 90 ms — h2https://juvel.pages.dev/images/logo.png/images/logo.png https://juvel.pages.dev/images/logo.png — 200 — 79.8 KiB — 110 ms — h3https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l7KmHrRpiZtK6GwN9w.woff2fonts.gstatic.com/s/tajawal/v12/Iur... https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l7KmHrRpiZtK6GwN9w.woff2 — 200 — 8.5 KiB — 49 ms — h3https://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzGBC5xLhLE.woff2fonts.gstatic.com/s/tajawal/v12/Iur... https://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzGBC5xLhLE.woff2 — 200 — 10.0 KiB — 36 ms — h3https://fonts.gstatic.com/s/marcellus/v14/wEO_EBrOk8hQLDvIAF81VvoK_kgXiQ.woff2fonts.gstatic.com/s/marcellus/v14/w... https://fonts.gstatic.com/s/marcellus/v14/wEO_EBrOk8hQLDvIAF81VvoK_kgXiQ.woff2 — 200 — 14.0 KiB — 54 ms — h3https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrRpiZtK6GwN9w.woff2fonts.gstatic.com/s/tajawal/v12/Iur... https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrRpiZtK6GwN9w.woff2 — 200 — 8.9 KiB — 39 ms — h3https://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzSBC5xLhLFw4Q.woff2fonts.gstatic.com/s/tajawal/v12/Iur... https://fonts.gstatic.com/s/tajawal/v12/Iura6YBj_oCad4k1nzSBC5xLhLFw4Q.woff2 — 200 — 8.7 KiB — 47 ms — h3https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrFpiZtK6Gw.woff2fonts.gstatic.com/s/tajawal/v12/Iur... https://fonts.gstatic.com/s/tajawal/v12/Iurf6YBj_oCad4k1l4qkHrFpiZtK6Gw.woff2 — 200 — 9.8 KiB — 29 ms — h3https://oqxgjktafchlhssurymd.supabase.co/rest/v1/products?select=*&order=id.ascoqxgjktafchlhssurymd.supabase.co/re... https://oqxgjktafchlhssurymd.supabase.co/rest/v1/products?select=*&order=id.asc — 200 — 0 B — 149 ms — h3https://juvel.pages.dev/images/logo.png/images/logo.png https://juvel.pages.dev/images/logo.png — 200 — 438 B — 53 ms — h3https://oqxgjktafchlhssurymd.supabase.co/rest/v1/products?select=*&order=id.ascoqxgjktafchlhssurymd.supabase.co/re... https://oqxgjktafchlhssurymd.supabase.co/rest/v1/products?select=*&order=id.asc — 200 — 3.0 KiB — 1.0 s — h3https://oqxgjktafchlhssurymd.supabase.co/rest/v1/settings?select=*&id=eq.mainoqxgjktafchlhssurymd.supabase.co/re... https://oqxgjktafchlhssurymd.supabase.co/rest/v1/settings?select=*&id=eq.main — 200 — 0 B — 42 ms — h3https://oqxgjktafchlhssurymd.supabase.co/rest/v1/settings?select=*&id=eq.mainoqxgjktafchlhssurymd.supabase.co/re... https://oqxgjktafchlhssurymd.supabase.co/rest/v1/settings?select=*&id=eq.main — 200 — 2.4 KiB — 481 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
3 images, 263 KB total, 145 KB wasted
INFO

Image Optimization Audit

Total Images

3

Total Size

263 KB

Oversized

2

Wasted

145 KB

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

Send Feedback