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https://dunaujlangos.hu

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
5
PASS
16
INFO
2

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

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.

3.11 s

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

4.36 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.

3.11 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.

4.36 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
25
16 PASS 5 REVIEW 2 FIX
D
Third-Party Impact
Action
63% third-party, 0 ms blocking
FIX
63% third-party, 0 ms blocking
Warning::
Third-party code accounts for 63% of page weight (544.2 KiB of 868.3 KiB)
Info::
Third-party blocking time is low (0 ms)
37%
63%
First-party Third-party
D
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.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

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.
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
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
868 KB transferred, 26 requests
PASS
868 KB transferred, 26 requests
Info::
Page weighs 2.2 MB (868 KB transferred)
Info::
26 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
868 KB / 2.4 MB budget
868 KB transferred
26 requests
0.18 g CO2 per page load
JavaScript 440.7 KiB 51%
Images 311.5 KiB 36%
Fonts 94.6 KiB 11%
Other 10.9 KiB 1%
HTML 6.1 KiB 1%
CSS 4.4 KiB 1%
Other 46 B 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
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Warning::
https://dunaujlangos.hu/logo.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
3 images 311 KB
0 oversized -0 KB
2 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

A+
JS Execution Cost
288ms total JS execution
PASS
288ms total JS execution
Info::
https://dunaujlangos.hu/: 165ms CPU time
Info::
Unattributable: 123ms CPU time

Main Thread Breakdown

Other 49% Style & Layout 35% Script Evaluation 7% Parse HTML & CSS 4% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://dunaujlangos.hu/165ms8ms2ms1st
Unattributable123ms10ms0ms1st
A+
Font Loading
4 fonts (95 KB)
PASS
4 fonts (95 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

95 KB total

Render-blocking

0

of 4

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 3.1 s LCP 4.4 shttps://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUje6bmMorHA.woff2qkB9XvYC6trAT55ZBi1ueQV... https://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUje6bmMorHA.woff2 — 23.7 KiB — 50 ms — font-display: swaphttps://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51jcAM4olXc.woff2wXKrE3kTposypRyd51jcAM4... https://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51jcAM4olXc.woff2 — 32.3 KiB — 63 ms — font-display: swaphttps://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51bcAM4olXcLtA.woff2wXKrE3kTposypRyd51bcAM4... https://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51bcAM4olXcLtA.woff2 — 26.9 KiB — 32 ms — font-display: swaphttps://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUjm6bmMorHBiTg.woff2qkB9XvYC6trAT55ZBi1ueQV... https://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUjm6bmMorHBiTg.woff2 — 11.7 KiB — 34 ms — font-display: swap
qkB9XvYC6trAT55ZBi1ueQV... woff2 swap
Size 24 KB
Load time 50 ms
Start 311 ms
Risk FOUT — text flashes from fallback to web font
wXKrE3kTposypRyd51jcAM4... woff2 swap
Size 32 KB
Load time 63 ms
Start 311 ms
Risk FOUT — text flashes from fallback to web font
wXKrE3kTposypRyd51bcAM4... woff2 swap
Size 27 KB
Load time 32 ms
Start 396 ms
Risk FOUT — text flashes from fallback to web font
qkB9XvYC6trAT55ZBi1ueQV... woff2 swap
Size 12 KB
Load time 34 ms
Start 397 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
13 scripts, 0 KB unused
PASS
13 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://maps.gstatic.com/maps-api-v3/embed/js/66/13d/intl/hu_ALL/init_embed.js74 KB—✓3rd
https://maps.googleapis.com/maps/api/js?key=AIzaSyCmL18misQw9KdwqGaw3zHkitj8vG6QF2Y&paint_origin=&libraries=geometry,search&v=weekly&loading=async&language=hu&experimentation=allowed&callback=onApiLoad3 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/search.js2 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/geometry.js3 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/main.js85 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/common.js37 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/util.js71 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/map.js26 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/controls.js27 KB—✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/places_impl.js4 KB—✓3rd
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
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::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
A
Page Weight Inventory
26 resources · 868 KB · 0 KB savings available
PASS
26 resources · 868 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 868 KB
Warning::
22 third-party resources (63% of weight)
Info::
1 resources over 200KB
26 resources · 868.3 KiB · 22 third-party Within 1MB page-weight target
JavaScript 51% · 440.7 KiB
Image 37% · 322.4 KiB
Font 11% · 94.6 KiB
Document 1% · 6.1 KiB
CSS 1% · 4.4 KiB
Other 0% · 46 B
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
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
26 requests over 2079ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.1 s LCP 4.4 shttps://dunaujlangos.hu// https://dunaujlangos.hu/ — 200 — 4.7 KiB — 147 ms — h2https://dunaujlangos.hu/style.css/style.css https://dunaujlangos.hu/style.css — 200 — 3.2 KiB — 138 ms — h2https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;700;800&family=Karla:wght@400;500;600;700&display=swapfonts.googleapis.com/css2?family=Ba... https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;700;800&family=Karla:wght@400;500;600;700&display=swap — 200 — 1.2 KiB — 112 ms — h2https://dunaujlangos.hu/logo.jpg/logo.jpg https://dunaujlangos.hu/logo.jpg — 200 — 305.2 KiB — 181 ms — h2https://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUje6bmMorHA.woff2fonts.gstatic.com/s/karla/v33/qkB9X... https://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUje6bmMorHA.woff2 — 200 — 23.7 KiB — 50 ms — h3https://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51jcAM4olXc.woff2fonts.gstatic.com/s/baloo2/v23/wXKr... https://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51jcAM4olXc.woff2 — 200 — 32.3 KiB — 63 ms — h3https://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51bcAM4olXcLtA.woff2fonts.gstatic.com/s/baloo2/v23/wXKr... https://fonts.gstatic.com/s/baloo2/v23/wXKrE3kTposypRyd51bcAM4olXcLtA.woff2 — 200 — 26.9 KiB — 32 ms — h3https://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUjm6bmMorHBiTg.woff2fonts.gstatic.com/s/karla/v33/qkB9X... https://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUjm6bmMorHBiTg.woff2 — 200 — 11.7 KiB — 34 ms — h3https://dunaujlangos.hu/favicon.ico/favicon.ico https://dunaujlangos.hu/favicon.ico — 200 — 10.9 KiB — 57 ms — h2https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d170.1935801806403!2d18.934386123970985!3d46.95977859278134!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x47421780bfaed74b%3A0x8d5d6f6e84265c00!2zRHVuYcO6amzDoW5nb3M!5e0!3m2!1shu!2shu!4v1789458057499!5m2!1shu!2shu%22www.google.com/maps/embed?pb=!1m18!... https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d170.1935801806403!2d18.934386123970985!3d46.95977859278134!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x47421780bfaed74b%3A0x8d5d6f6e84265c00!2zRHVuYcO6amzDoW5nb3M!5e0!3m2!1shu!2shu!4v1789458057499!5m2!1shu!2shu%22 — 200 — 1.4 KiB — 280 ms — h3https://maps.gstatic.com/maps-api-v3/embed/js/66/13d/intl/hu_ALL/init_embed.jsmaps.gstatic.com/maps-api-v3/embed/... https://maps.gstatic.com/maps-api-v3/embed/js/66/13d/intl/hu_ALL/init_embed.js — 200 — 74.1 KiB — 171 ms — h2https://maps.googleapis.com/maps/api/js?key=AIzaSyCmL18misQw9KdwqGaw3zHkitj8vG6QF2Y&paint_origin=&libraries=geometry,search&v=weekly&loading=async&language=hu&experimentation=allowed&callback=onApiLoadmaps.googleapis.com/maps/api/js?key... https://maps.googleapis.com/maps/api/js?key=AIzaSyCmL18misQw9KdwqGaw3zHkitj8vG6QF2Y&paint_origin=&libraries=geometry,search&v=weekly&loading=async&language=hu&experimentation=allowed&callback=onApiLoad — 200 — 3.1 KiB — 116 ms — h2https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/search.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/search.js — 200 — 1.5 KiB — 31 ms — h2https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/geometry.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/geometry.js — 200 — 2.7 KiB — 38 ms — h2https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/main.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/main.js — 200 — 85.4 KiB — 84 ms — h2https://maps.googleapis.com/maps/api/mapsjs/gen_204?csp_test=truemaps.googleapis.com/maps/api/mapsjs... https://maps.googleapis.com/maps/api/mapsjs/gen_204?csp_test=true — 200 — 46 B — 31 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/common.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/common.js — 200 — 37.4 KiB — 54 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/util.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/util.js — 200 — 70.7 KiB — 90 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/map.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/map.js — 200 — 25.6 KiB — 61 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/controls.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/controls.js — 200 — 26.8 KiB — 52 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/places_impl.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/places_impl.js — 200 — 3.6 KiB — 59 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/places.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/places.js — 200 — 99.1 KiB — 75 ms — h3data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20fill%3D%22none%22%20viewBo…data:image/svg+xml,%3Csvg%20xmlns%3... data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20fill%3D%22none%22%20viewBo… — 200 — 0 B — 0 ms — datahttps://maps.googleapis.com/maps/api/js/StaticMapService.GetMapImage?1m2&1i74167979&2i47229785&2e1&3u19&4m2&1u350&2u261&5m6&1e0&5shu&6sus&10b1&12b1&14i47083502&8e1&key=AIzaSyCmL18misQw9KdwqGaw3zHkitj8vG6QF2Y&token=48507maps.googleapis.com/maps/api/js/Sta... https://maps.googleapis.com/maps/api/js/StaticMapService.GetMapImage?1m2&1i74167979&2i47229785&2e1&3u19&4m2&1u350&2u261&5m6&1e0&5shu&6sus&10b1&12b1&14i47083502&8e1&key=AIzaSyCmL18misQw9KdwqGaw3zHkitj8vG6QF2Y&token=48507 — 200 — 6.3 KiB — 100 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/onion.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/onion.js — 200 — 9.4 KiB — 49 ms — h3https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/search_impl.jsmaps.googleapis.com/maps-api-v3/api... https://maps.googleapis.com/maps-api-v3/api/js/66/13d/intl/hu_ALL/search_impl.js — 200 — 1.3 KiB — 50 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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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