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https://wko.at

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
96
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

808 ms

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

1.29 s

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

3 ms

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

0.024

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

849 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.

1.29 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
15
6 PASS 4 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
50 resources · 1.8 MB · 149 KB savings available
FIX
50 resources · 1.8 MB · 149 KB savings available
Warning::
Page weight 818 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~149 KB of savings available
Warning::
49 third-party resources (100% of weight)
50 resources · 1.8 MiB · 49 third-party 817.9 KiB over 1MB target
Image 66% · 1.2 MiB
JavaScript 14% · 249.5 KiB
Font 13% · 242.7 KiB
CSS 4% · 72.5 KiB
Document 3% · 48.8 KiB
Other 1% · 15.2 KiB

~148.8 KiB of savings available

Remove unused JavaScript: 148.8 KiB
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: no-cache, no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, no-store

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
C
Page Weight Budget
Action
1.8 MB transferred, 50 requests
REVIEW
1.8 MB transferred, 50 requests
Info::
Page weighs 3.4 MB (1.8 MB transferred)
Warning::
Images are 1.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.0 MB
Info::
Fonts are 243 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 243 KB
Info::
50 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
50 requests
0.38 g CO2 per page load
Images 1.0 MiB 56%
JavaScript 247.8 KiB 13%
Fonts 242.7 KiB 13%
Other 184.8 KiB 10%
CSS 72.5 KiB 4%
HTML 43.9 KiB 2%
Other 20.9 KiB 1%
Other 622 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

C
Image Optimization
Action
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.wko.at/image/rs:fill:896:504:1/gravity... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/1128/365/crop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.wko.at/image/rs:fill:896:504:1/gravity... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/522/293/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/1128/365/crop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/1128/365/crop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/202/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/360/380/cropa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.wko.at/image/rs:fill:896:504:1/gravity... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.wko.at/image/rs:fill:896:504:1/gravity... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/static/images/logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wko.at/GenticsImageStore/1128/365/crop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
27 images 1.0 MB
0 oversized -0 KB
23 legacy format
23 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 Bundles
6 scripts, 149 KB unused
REVIEW
6 scripts, 149 KB unused
Warning::
https://www.wko.at/static/js/wkoui.BE0-xgmD.js: 108 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.wko.at/static/js/powerbi.js?v=22042026: 41 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.wko.at/static/js/powerbi.js?v=22042026: unminified — 31 KB could be saved
Info::
Total unused JavaScript: 149 KB
149 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.wko.at/static/js/wkoui.BE0-xgmD.js154 KB108 KB (70%)✓3rd
https://www.wko.at/static/js/powerbi.js?v=2204202677 KB41 KB (53%)✗3rd
https://www.wko.at/static/js/GCM.a1f1e49c.js4 KB—✓3rd
https://www.wko.at/static/js/consent.9d721d9a.js10 KB—✓3rd
https://www.wko.at/static/js/config.22450232.js2 KB—✓3rd
https://chatbot.wko.at/cm.js4 KB—✓3rd

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

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

Green Hosting

No green hosting detected

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+
JS Execution Cost
292ms total JS execution
PASS
292ms total JS execution
Info::
https://www.wko.at/: 150ms CPU time
Info::
https://www.wko.at/static/js/wkoui.BE0-xgmD.js: 77ms CPU time
Info::
Unattributable: 66ms CPU time
Warning::
Third-party scripts: 292ms (100% of total)

Main Thread Breakdown

Script Evaluation 35% Other 27% Style & Layout 18% Script Parsing & Compilation 8% Rendering 7% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://www.wko.at/150ms53ms0ms3rd
https://www.wko.at/static/js/wkoui.BE0-xgmD.js77ms44ms13ms3rd
Unattributable66ms1ms0ms3rd
A+
Font Loading
3 fonts (243 KB)
PASS
3 fonts (243 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

243 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 808 ms LCP 1.3 shttps://www.wko.at/static/assets/fonts/DINWebPro.DH1rXO6d.woff2DINWebPro.DH1rXO6d.woff2 https://www.wko.at/static/assets/fonts/DINWebPro.DH1rXO6d.woff2 — 79.8 KiB — 84 ms — font-display: swaphttps://www.wko.at/static/assets/fonts/DINWebPro-Bold.DtHtoHm4.woff2DINWebPro-Bold.DtHtoHm4... https://www.wko.at/static/assets/fonts/DINWebPro-Bold.DtHtoHm4.woff2 — 82.0 KiB — 47 ms — font-display: swaphttps://www.wko.at/static/assets/fonts/DINWebPro-Medium.CenYimou.woff2DINWebPro-Medium.CenYim... https://www.wko.at/static/assets/fonts/DINWebPro-Medium.CenYimou.woff2 — 80.9 KiB — 61 ms — font-display: swap
DINWebPro.DH1rXO6d.woff2 woff2 swap
Size 80 KB
Load time 84 ms
Start 336 ms
Risk FOUT — text flashes from fallback to web font
DINWebPro-Bold.DtHtoHm4... woff2 swap
Size 82 KB
Load time 47 ms
Start 401 ms
Risk FOUT — text flashes from fallback to web font
DINWebPro-Medium.CenYim... woff2 swap
Size 81 KB
Load time 61 ms
Start 402 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+
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
Network Waterfall
50 requests over 866ms
INFO
0 ms 500 ms 1.0 s FCP 808 ms LCP 1.3 shttps://wko.at// https://wko.at/ — 301 — 442 B — 134 ms — h2https://www.wko.at/www.wko.at/ https://www.wko.at/ — 200 — 43.9 KiB — 76 ms — h2https://www.wko.at/static/css/wkoui.o2Y5HumG.csswww.wko.at/static/css/wkoui.o2Y5Hum... https://www.wko.at/static/css/wkoui.o2Y5HumG.css — 200 — 70.6 KiB — 78 ms — h2https://www.wko.at/static/js/powerbi.js?v=22042026www.wko.at/static/js/powerbi.js?v=2... https://www.wko.at/static/js/powerbi.js?v=22042026 — 200 — 76.8 KiB — 105 ms — h2https://www.wko.at/static/js/GCM.a1f1e49c.jswww.wko.at/static/js/GCM.a1f1e49c.j... https://www.wko.at/static/js/GCM.a1f1e49c.js — 200 — 3.6 KiB — 75 ms — h2https://www.wko.at/static/js/consent.9d721d9a.jswww.wko.at/static/js/consent.9d721d... https://www.wko.at/static/js/consent.9d721d9a.js — 200 — 9.5 KiB — 76 ms — h2https://www.wko.at/static/images/logo.svgwww.wko.at/static/images/logo.svg https://www.wko.at/static/images/logo.svg — 200 — 1.8 KiB — 103 ms — h2https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/90/750/242/oe/news/rechner-brille-adobestock-pit24-100895913.jpgwww.wko.at/GenticsImageStore/1128/3... https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/90/750/242/oe/news/rechner-brille-adobestock-pit24-100895913.jpg — 200 — 90.1 KiB — 104 ms — h2https://www.wko.at/static/js/config.22450232.jswww.wko.at/static/js/config.2245023... https://www.wko.at/static/js/config.22450232.js — 200 — 1.8 KiB — 46 ms — h2https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/0/3200/1035/oe/news/gs-danninger-wkoat-marekknopp13.jpgwww.wko.at/GenticsImageStore/1128/3... https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/0/3200/1035/oe/news/gs-danninger-wkoat-marekknopp13.jpg — 200 — 92.9 KiB — 46 ms — h2https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/549/3200/1035/oe/oesterreich/tankstelle-adobestock-dusan-petkovic-540620761.jpegwww.wko.at/GenticsImageStore/1128/3... https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/549/3200/1035/oe/oesterreich/tankstelle-adobestock-dusan-petkovic-540620761.jpeg — 200 — 103.6 KiB — 47 ms — h2https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/765/3200/1035/oe/aussenwirtschaft/infopoint-nahost-adobestock-333197505-nikhom.pngwww.wko.at/GenticsImageStore/1128/3... https://www.wko.at/GenticsImageStore/1128/365/cropandresize/smart/0/765/3200/1035/oe/aussenwirtschaft/infopoint-nahost-adobestock-333197505-nikhom.png — 200 — 147.2 KiB — 86 ms — h2https://www.wko.at/static/js/wkoui.BE0-xgmD.jswww.wko.at/static/js/wkoui.BE0-xgmD... https://www.wko.at/static/js/wkoui.BE0-xgmD.js — 200 — 154.0 KiB — 97 ms — h2https://chatbot.wko.at/cm.jschatbot.wko.at/cm.js https://chatbot.wko.at/cm.js — 200 — 3.8 KiB — 137 ms — http/1.1https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/1/750/420/oe/it-sicherheit/cybersecurity-adobestock-kanawaith-279975967.jpgwww.wko.at/GenticsImageStore/360/20... https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/1/750/420/oe/it-sicherheit/cybersecurity-adobestock-kanawaith-279975967.jpg — 200 — 55.3 KiB — 87 ms — h2https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/169/3200/1795/oe/foerderungen/solaranlagen-arbeiten-adobestock-chokniti-563698788.jpegwww.wko.at/GenticsImageStore/360/20... https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/169/3200/1795/oe/foerderungen/solaranlagen-arbeiten-adobestock-chokniti-563698788.jpeg — 200 — 34.6 KiB — 94 ms — h2https://www.wko.at/static/assets/fonts/DINWebPro.DH1rXO6d.woff2www.wko.at/static/assets/fonts/DINW... https://www.wko.at/static/assets/fonts/DINWebPro.DH1rXO6d.woff2 — 200 — 79.8 KiB — 84 ms — h2https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/171/3200/1795/oe/lehre/home-office-adobestock-drobot-dean-209719597.jpegwww.wko.at/GenticsImageStore/360/20... https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/171/3200/1795/oe/lehre/home-office-adobestock-drobot-dean-209719597.jpeg — 200 — 22.4 KiB — 89 ms — h2https://www.wko.at/static/assets/images/icons/icon-arrow-slide-left.B6tCPUWe.svgwww.wko.at/static/assets/images/ico... https://www.wko.at/static/assets/images/icons/icon-arrow-slide-left.B6tCPUWe.svg — 200 — 651 B — 60 ms — h2https://www.wko.at/static/assets/images/icons/icon-arrow-slide-right.BDdhZYn_.svgwww.wko.at/static/assets/images/ico... https://www.wko.at/static/assets/images/icons/icon-arrow-slide-right.BDdhZYn_.svg — 200 — 634 B — 61 ms — h2https://www.wko.at/static/assets/fonts/DINWebPro-Bold.DtHtoHm4.woff2www.wko.at/static/assets/fonts/DINW... https://www.wko.at/static/assets/fonts/DINWebPro-Bold.DtHtoHm4.woff2 — 200 — 82.0 KiB — 47 ms — h2https://www.wko.at/static/assets/fonts/DINWebPro-Medium.CenYimou.woff2www.wko.at/static/assets/fonts/DINW... https://www.wko.at/static/assets/fonts/DINWebPro-Medium.CenYimou.woff2 — 200 — 80.9 KiB — 61 ms — h2https://www.wko.at/GenticsImageStore/360/380/cropandresize/smart/0/1/1696/1790/oe/wko-faz-allgemein-card-adobestock-perigtemplate-272719408.jpgwww.wko.at/GenticsImageStore/360/38... https://www.wko.at/GenticsImageStore/360/380/cropandresize/smart/0/1/1696/1790/oe/wko-faz-allgemein-card-adobestock-perigtemplate-272719408.jpg — 200 — 34.2 KiB — 63 ms — h2https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/114/3200/1795/oe/kollektivvertrag-adobestock-mq-illustrations-336326552.jpegwww.wko.at/GenticsImageStore/360/20... https://www.wko.at/GenticsImageStore/360/202/cropandresize/smart/0/114/3200/1795/oe/kollektivvertrag-adobestock-mq-illustrations-336326552.jpeg — 200 — 25.7 KiB — 49 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
100% of JavaScript execution is third-party
First-party Third-party 292ms · 198KB · €3/mo
www.wko.at
Other
Optional
Execution 150ms
Transfer 44 KB
Monthly Cost €2/mo
www.wko.at
Other
Optional
Execution 77ms
Transfer 154 KB
Unused 70%
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 66ms
Transfer 0 KB
Monthly Cost €1/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

70% of www.wko.at'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

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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