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https://krakow.pl

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
66
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
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.

2.19 s

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

8.47 s

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

84 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.

7.53 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.

8.69 s

Page Load Progression

612 ms
1.2 s
1.8 s
2.4 s
3.1 s
3.7 s
4.3 s
4.9 s
Checks
17
8 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
3.1 MB transferred, 67 requests
FIX
3.1 MB transferred, 67 requests
Warning::
Page weighs 3.8 MB (3.1 MB transferred)
Warning::
Images are 2.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.7 MB
Info::
67 HTTP requests
Info::
Estimated 0.66 g CO2 per page load
3.1 MB / 2.4 MB budget
3.1 MB transferred
67 requests
0.66 g CO2 per page load
Images 2.7 MiB 87%
JavaScript 203.6 KiB 6%
Fonts 173.0 KiB 5%
CSS 29.0 KiB 1%
HTML 18.5 KiB 1%
Other 1.4 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

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 (2.7 MiB of 3.1 MiB)
Info::
Third-party blocking time is low (0 ms)
86%
First-party Third-party
D
JS Execution Cost
Action
2648ms total JS execution
FIX
2648ms total JS execution
Warning::
https://krakow.pl/: 849ms CPU time
Warning::
Unattributable: 628ms CPU time
Warning::
https://krakow.pl/build/7592.635850b7.js: 524ms CPU time
Warning::
https://krakow.pl/build/index.a627e642.js: 471ms CPU time
Info::
https://krakow.pl/build/fonts.61187402.js: 177ms CPU time
Info::
Third-party scripts: 628ms (24% of total)

Main Thread Breakdown

Other 35% Script Evaluation 27% Style & Layout 24% Rendering 8% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://krakow.pl/849ms37ms3ms1st
Unattributable628ms12ms0ms3rd
https://krakow.pl/build/7592.635850b7.js524ms202ms9ms1st
https://krakow.pl/build/index.a627e642.js471ms379ms5ms1st
https://krakow.pl/build/fonts.61187402.js177ms92ms0ms1st
D
Page Weight Inventory
Action
67 resources · 3.1 MB · 23 KB savings available
FIX
67 resources · 3.1 MB · 23 KB savings available
Warning::
Page weight 2.1 MB over 1MB target
Got: 3.1 MB Expected: ≤ 1 MB
Warning::
35 third-party resources (86% of weight)
Info::
3 resources over 200KB
67 resources · 3.1 MiB · 35 third-party 2.1 MiB over 1MB target
Image 87% · 2.7 MiB
JavaScript 6% · 203.6 KiB
Font 5% · 173.0 KiB
CSS 1% · 29.0 KiB
Document 1% · 18.5 KiB

~22.6 KiB of savings available

Remove unused JavaScript: 22.6 KiB
B
Image Optimization
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Warning::
https://krakow.pl/build/img/pogoda_dobry.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42 images 2.7 MB
0 oversized -0 KB
42 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

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

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0, must-revalidate, private
REVIEW
max-age=0, must-revalidate, private
Info::
Cache-Control header is set
Got: max-age=0, must-revalidate, private
Info::
ETag present — enables conditional (304) responses
Cache-Control

max-age=0, must-revalidate, private

DirectiveValueMeaning
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
private—Only browser cache, not CDN/proxy
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
4 fonts (173 KB)
PASS
4 fonts (173 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

173 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 5.0 s 6.0 s 7.0 s 8.0 s FCP 2.2 s LCP 8.5 shttps://krakow.pl/build/fonts/LatoLatin-Regular.f42ffe0a.woff2LatoLatin-Regular.f42ff... https://krakow.pl/build/fonts/LatoLatin-Regular.f42ffe0a.woff2 — 43.0 KiB — 2.5 s — font-display: swaphttps://krakow.pl/build/fonts/LatoLatin-Black.88c59fed.woff2LatoLatin-Black.88c59fe... https://krakow.pl/build/fonts/LatoLatin-Black.88c59fed.woff2 — 42.7 KiB — 3.0 s — font-display: swaphttps://krakow.pl/build/fonts/LatoLatin-Bold.b4fe4204.woff2LatoLatin-Bold.b4fe4204... https://krakow.pl/build/fonts/LatoLatin-Bold.b4fe4204.woff2 — 43.6 KiB — 2.7 s — font-display: swaphttps://krakow.pl/build/fonts/LatoLatin-Semibold.b8c03b80.woff2LatoLatin-Semibold.b8c0... https://krakow.pl/build/fonts/LatoLatin-Semibold.b8c03b80.woff2 — 43.6 KiB — 1.0 s — font-display: swap
LatoLatin-Regular.f42ff... woff2 swap
Size 43 KB
Load time 2.5 s
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
LatoLatin-Black.88c59fe... woff2 swap
Size 43 KB
Load time 3.0 s
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
LatoLatin-Bold.b4fe4204... woff2 swap
Size 44 KB
Load time 2.7 s
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
LatoLatin-Semibold.b8c0... woff2 swap
Size 44 KB
Load time 1.0 s
Start 4.3 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+
JS Bundles
17 scripts, 23 KB unused
PASS
17 scripts, 23 KB unused
Warning::
https://krakow.pl/build/4692.8f03972d.js: 23 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 23 KB
23 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://krakow.pl/build/4692.8f03972d.js30 KB23 KB (76%)✓1st
https://krakow.pl/build/670.d9dff637.js3 KB—✓1st
https://krakow.pl/build/7185.0ab02b59.js4 KB—✓1st
https://krakow.pl/build/smog.7ad34dee.js1 KB—✓1st
https://krakow.pl/build/6429.93794f19.js16 KB—✓1st
https://krakow.pl/build/6817.ab96cc01.js3 KB—✓1st
https://krakow.pl/build/5266.fd7cf7eb.js3 KB—✓1st
https://krakow.pl/build/fonts.61187402.js2 KB—✓1st
https://krakow.pl/build/4263.4b7439be.js4 KB—✓1st
https://krakow.pl/build/8465.8c161ef5.js20 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+
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
Network Waterfall
67 requests over 5461ms
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 2.2 s LCP 8.5 shttps://krakow.pl// https://krakow.pl/ — 200 — 18.5 KiB — 1.6 s — h2https://krakow.pl/build/index.89901dc0.css/build/index.89901dc0.css https://krakow.pl/build/index.89901dc0.css — 200 — 28.7 KiB — 494 ms — h2https://krakow.pl/build/smog.73c6644d.css/build/smog.73c6644d.css https://krakow.pl/build/smog.73c6644d.css — 200 — 265 B — 312 ms — h2https://krakow.pl/build/img/bip_logo.svg/build/img/bip_logo.svg https://krakow.pl/build/img/bip_logo.svg — 200 — 8.7 KiB — 170 ms — h2https://krakow.pl/build/img/bip_logo_kontrast.png/build/img/bip_logo_kontrast.png https://krakow.pl/build/img/bip_logo_kontrast.png — 200 — 2.1 KiB — 307 ms — h2https://krakow.pl/build/img/bip_mobile_logo.svg/build/img/bip_mobile_logo.svg https://krakow.pl/build/img/bip_mobile_logo.svg — 200 — 1.6 KiB — 627 ms — h2https://krakow.pl/build/img/dekorLeft.svg/build/img/dekorLeft.svg https://krakow.pl/build/img/dekorLeft.svg — 200 — 9.5 KiB — 647 ms — h2https://krakow.pl/build/img/dekorRight.svg/build/img/dekorRight.svg https://krakow.pl/build/img/dekorRight.svg — 200 — 10.3 KiB — 809 ms — h2https://krakow.pl/build/6429.93794f19.js/build/6429.93794f19.js https://krakow.pl/build/6429.93794f19.js — 200 — 15.6 KiB — 970 ms — h2https://krakow.pl/build/8916.b206c4c5.js/build/8916.b206c4c5.js https://krakow.pl/build/8916.b206c4c5.js — 200 — 23.1 KiB — 1.3 s — h2https://krakow.pl/build/fonts.61187402.js/build/fonts.61187402.js https://krakow.pl/build/fonts.61187402.js — 200 — 1.8 KiB — 1.1 s — h2https://plikimpi.krakow.pl/pliki/636447.pngplikimpi.krakow.pl/pliki/636447.png https://plikimpi.krakow.pl/pliki/636447.png — 200 — 142.5 KiB — 1.5 s — h2https://plikimpi.krakow.pl/pliki/605079.jpgplikimpi.krakow.pl/pliki/605079.jpg https://plikimpi.krakow.pl/pliki/605079.jpg — 200 — 364.9 KiB — 1.6 s — h2https://plikimpi.krakow.pl/pliki/636255.jpgplikimpi.krakow.pl/pliki/636255.jpg https://plikimpi.krakow.pl/pliki/636255.jpg — 200 — 136.6 KiB — 1.6 s — h2https://plikimpi.krakow.pl/pliki/629319.jpgplikimpi.krakow.pl/pliki/629319.jpg https://plikimpi.krakow.pl/pliki/629319.jpg — 200 — 188.8 KiB — 1.3 s — h2https://plikimpi.krakow.pl/pliki/622800.pngplikimpi.krakow.pl/pliki/622800.png https://plikimpi.krakow.pl/pliki/622800.png — 200 — 320.3 KiB — 1.6 s — h2https://krakow.pl/build/img/pause_icon.svg/build/img/pause_icon.svg https://krakow.pl/build/img/pause_icon.svg — 200 — 693 B — 967 ms — h2https://krakow.pl/build/img/pogoda_dobry.svg/build/img/pogoda_dobry.svg https://krakow.pl/build/img/pogoda_dobry.svg — 200 — 1.1 KiB — 1.3 s — h2https://plikimpi.krakow.pl/zalacznik/572337/3.jpgplikimpi.krakow.pl/zalacznik/572337... https://plikimpi.krakow.pl/zalacznik/572337/3.jpg — 200 — 62.0 KiB — 1.2 s — h2https://media.krakow.travel/photos/73578/l.jpgmedia.krakow.travel/photos/73578/l.... https://media.krakow.travel/photos/73578/l.jpg — 200 — 64.9 KiB — 1.4 s — http/1.1https://media.krakow.travel/photos/76974/l.jpgmedia.krakow.travel/photos/76974/l.... https://media.krakow.travel/photos/76974/l.jpg — 200 — 420.9 KiB — 1.9 s — http/1.1https://media.krakow.travel/photos/70873/l.jpgmedia.krakow.travel/photos/70873/l.... https://media.krakow.travel/photos/70873/l.jpg — 200 — 32.2 KiB — 1.1 s — http/1.1https://media.krakow.travel/photos/71148/l.jpgmedia.krakow.travel/photos/71148/l.... https://media.krakow.travel/photos/71148/l.jpg — 200 — 84.0 KiB — 1.4 s — http/1.1https://krakow.pl/build/smog.7ad34dee.js/build/smog.7ad34dee.js https://krakow.pl/build/smog.7ad34dee.js — 200 — 564 B — 1.6 s — h2https://krakow.pl/build/670.d9dff637.js/build/670.d9dff637.js https://krakow.pl/build/670.d9dff637.js — 200 — 3.1 KiB — 1.1 s — h2https://krakow.pl/build/6817.ab96cc01.js/build/6817.ab96cc01.js https://krakow.pl/build/6817.ab96cc01.js — 200 — 3.0 KiB — 1.3 s — h2https://krakow.pl/build/5266.fd7cf7eb.js/build/5266.fd7cf7eb.js https://krakow.pl/build/5266.fd7cf7eb.js — 200 — 2.8 KiB — 1.6 s — h2https://krakow.pl/build/4263.4b7439be.js/build/4263.4b7439be.js https://krakow.pl/build/4263.4b7439be.js — 200 — 4.0 KiB — 1.1 s — h2https://krakow.pl/build/4692.8f03972d.js/build/4692.8f03972d.js https://krakow.pl/build/4692.8f03972d.js — 200 — 30.0 KiB — 1.8 s — h2https://krakow.pl/build/8465.8c161ef5.js/build/8465.8c161ef5.js https://krakow.pl/build/8465.8c161ef5.js — 200 — 20.1 KiB — 1.6 s — h2
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 2.2 s LCP 8.5 shttps://krakow.pl// https://krakow.pl/ — 200 — 18.5 KiB — 1.6 s — h2https://krakow.pl/build/index.89901dc0.css/build/index.89901dc0.css https://krakow.pl/build/index.89901dc0.css — 200 — 28.7 KiB — 494 ms — h2https://krakow.pl/build/smog.73c6644d.css/build/smog.73c6644d.css https://krakow.pl/build/smog.73c6644d.css — 200 — 265 B — 312 ms — h2https://krakow.pl/build/img/bip_logo.svg/build/img/bip_logo.svg https://krakow.pl/build/img/bip_logo.svg — 200 — 8.7 KiB — 170 ms — h2https://krakow.pl/build/img/bip_logo_kontrast.png/build/img/bip_logo_kontrast.png https://krakow.pl/build/img/bip_logo_kontrast.png — 200 — 2.1 KiB — 307 ms — h2https://krakow.pl/build/img/bip_mobile_logo.svg/build/img/bip_mobile_logo.svg https://krakow.pl/build/img/bip_mobile_logo.svg — 200 — 1.6 KiB — 627 ms — h2https://krakow.pl/build/img/dekorLeft.svg/build/img/dekorLeft.svg https://krakow.pl/build/img/dekorLeft.svg — 200 — 9.5 KiB — 647 ms — h2https://krakow.pl/build/img/dekorRight.svg/build/img/dekorRight.svg https://krakow.pl/build/img/dekorRight.svg — 200 — 10.3 KiB — 809 ms — h2https://krakow.pl/build/6429.93794f19.js/build/6429.93794f19.js https://krakow.pl/build/6429.93794f19.js — 200 — 15.6 KiB — 970 ms — h2https://krakow.pl/build/8916.b206c4c5.js/build/8916.b206c4c5.js https://krakow.pl/build/8916.b206c4c5.js — 200 — 23.1 KiB — 1.3 s — h2https://krakow.pl/build/fonts.61187402.js/build/fonts.61187402.js https://krakow.pl/build/fonts.61187402.js — 200 — 1.8 KiB — 1.1 s — h2https://plikimpi.krakow.pl/pliki/636447.pngplikimpi.krakow.pl/pliki/636447.png https://plikimpi.krakow.pl/pliki/636447.png — 200 — 142.5 KiB — 1.5 s — h2https://plikimpi.krakow.pl/pliki/605079.jpgplikimpi.krakow.pl/pliki/605079.jpg https://plikimpi.krakow.pl/pliki/605079.jpg — 200 — 364.9 KiB — 1.6 s — h2https://plikimpi.krakow.pl/pliki/636255.jpgplikimpi.krakow.pl/pliki/636255.jpg https://plikimpi.krakow.pl/pliki/636255.jpg — 200 — 136.6 KiB — 1.6 s — h2https://plikimpi.krakow.pl/pliki/629319.jpgplikimpi.krakow.pl/pliki/629319.jpg https://plikimpi.krakow.pl/pliki/629319.jpg — 200 — 188.8 KiB — 1.3 s — h2https://plikimpi.krakow.pl/pliki/622800.pngplikimpi.krakow.pl/pliki/622800.png https://plikimpi.krakow.pl/pliki/622800.png — 200 — 320.3 KiB — 1.6 s — h2https://krakow.pl/build/img/pause_icon.svg/build/img/pause_icon.svg https://krakow.pl/build/img/pause_icon.svg — 200 — 693 B — 967 ms — h2https://krakow.pl/build/img/pogoda_dobry.svg/build/img/pogoda_dobry.svg https://krakow.pl/build/img/pogoda_dobry.svg — 200 — 1.1 KiB — 1.3 s — h2https://plikimpi.krakow.pl/zalacznik/572337/3.jpgplikimpi.krakow.pl/zalacznik/572337... https://plikimpi.krakow.pl/zalacznik/572337/3.jpg — 200 — 62.0 KiB — 1.2 s — h2https://media.krakow.travel/photos/73578/l.jpgmedia.krakow.travel/photos/73578/l.... https://media.krakow.travel/photos/73578/l.jpg — 200 — 64.9 KiB — 1.4 s — http/1.1https://media.krakow.travel/photos/76974/l.jpgmedia.krakow.travel/photos/76974/l.... https://media.krakow.travel/photos/76974/l.jpg — 200 — 420.9 KiB — 1.9 s — http/1.1https://media.krakow.travel/photos/70873/l.jpgmedia.krakow.travel/photos/70873/l.... https://media.krakow.travel/photos/70873/l.jpg — 200 — 32.2 KiB — 1.1 s — http/1.1https://media.krakow.travel/photos/71148/l.jpgmedia.krakow.travel/photos/71148/l.... https://media.krakow.travel/photos/71148/l.jpg — 200 — 84.0 KiB — 1.4 s — http/1.1https://krakow.pl/build/smog.7ad34dee.js/build/smog.7ad34dee.js https://krakow.pl/build/smog.7ad34dee.js — 200 — 564 B — 1.6 s — h2https://krakow.pl/build/670.d9dff637.js/build/670.d9dff637.js https://krakow.pl/build/670.d9dff637.js — 200 — 3.1 KiB — 1.1 s — h2https://krakow.pl/build/6817.ab96cc01.js/build/6817.ab96cc01.js https://krakow.pl/build/6817.ab96cc01.js — 200 — 3.0 KiB — 1.3 s — h2https://krakow.pl/build/5266.fd7cf7eb.js/build/5266.fd7cf7eb.js https://krakow.pl/build/5266.fd7cf7eb.js — 200 — 2.8 KiB — 1.6 s — h2https://krakow.pl/build/4263.4b7439be.js/build/4263.4b7439be.js https://krakow.pl/build/4263.4b7439be.js — 200 — 4.0 KiB — 1.1 s — h2https://krakow.pl/build/4692.8f03972d.js/build/4692.8f03972d.js https://krakow.pl/build/4692.8f03972d.js — 200 — 30.0 KiB — 1.8 s — h2https://krakow.pl/build/8465.8c161ef5.js/build/8465.8c161ef5.js https://krakow.pl/build/8465.8c161ef5.js — 200 — 20.1 KiB — 1.6 s — h2https://krakow.pl/build/7185.0ab02b59.js/build/7185.0ab02b59.js https://krakow.pl/build/7185.0ab02b59.js — 200 — 3.5 KiB — 1.8 s — h2https://krakow.pl/build/7592.635850b7.js/build/7592.635850b7.js https://krakow.pl/build/7592.635850b7.js — 200 — 27.9 KiB — 2.0 s — h2https://krakow.pl/build/5806.47aeeeaf.js/build/5806.47aeeeaf.js https://krakow.pl/build/5806.47aeeeaf.js — 200 — 5.8 KiB — 2.1 s — h2https://krakow.pl/build/6797.e6c5a330.js/build/6797.e6c5a330.js https://krakow.pl/build/6797.e6c5a330.js — 200 — 7.4 KiB — 2.1 s — h2https://krakow.pl/build/1157.35eb28b9.js/build/1157.35eb28b9.js https://krakow.pl/build/1157.35eb28b9.js — 200 — 3.6 KiB — 2.1 s — h2https://krakow.pl/build/1562.097959e8.js/build/1562.097959e8.js https://krakow.pl/build/1562.097959e8.js — 200 — 34.8 KiB — 2.4 s — h2https://krakow.pl/build/index.a627e642.js/build/index.a627e642.js https://krakow.pl/build/index.a627e642.js — 200 — 16.6 KiB — 2.6 s — h2https://plikimpi.krakow.pl/zalacznik/572268/9.jpgplikimpi.krakow.pl/zalacznik/572268... https://plikimpi.krakow.pl/zalacznik/572268/9.jpg — 200 — 12.4 KiB — 1.1 s — h2https://plikimpi.krakow.pl/zalacznik/569922/9.pngplikimpi.krakow.pl/zalacznik/569922... https://plikimpi.krakow.pl/zalacznik/569922/9.png — 200 — 104.1 KiB — 1.1 s — h2https://plikimpi.krakow.pl/zalacznik/571674/frame_9_4175151610.jpgplikimpi.krakow.pl/zalacznik/571674... https://plikimpi.krakow.pl/zalacznik/571674/frame_9_4175151610.jpg — 200 — 19.0 KiB — 1.1 s — 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https://plikimpi.krakow.pl/zalacznik/571653/9.jpg — 200 — 19.1 KiB — 1.2 s — h2https://plikimpi.krakow.pl/zalacznik/571707/9.pngplikimpi.krakow.pl/zalacznik/571707... https://plikimpi.krakow.pl/zalacznik/571707/9.png — 200 — 118.3 KiB — 1.2 s — h2https://plikimpi.krakow.pl/zalacznik/572007/9.jpgplikimpi.krakow.pl/zalacznik/572007... https://plikimpi.krakow.pl/zalacznik/572007/9.jpg — 200 — 17.8 KiB — 1.2 s — h2https://plikimpi.krakow.pl/zalacznik/570465/9.jpgplikimpi.krakow.pl/zalacznik/570465... https://plikimpi.krakow.pl/zalacznik/570465/9.jpg — 200 — 25.2 KiB — 1.2 s — h2https://plikimpi.krakow.pl/zalacznik/571422/9.jpgplikimpi.krakow.pl/zalacznik/571422... https://plikimpi.krakow.pl/zalacznik/571422/9.jpg — 200 — 13.4 KiB — 1.2 s — h2https://plikimpi.krakow.pl/zalacznik/571521/9.jpgplikimpi.krakow.pl/zalacznik/571521... https://plikimpi.krakow.pl/zalacznik/571521/9.jpg — 200 — 23.3 KiB — 1.2 s — 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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
24% of JavaScript execution is third-party
First-party Third-party 628ms · 0KB · zł15/mo
Unattributable
Other
Costly
Execution 628ms
Transfer 0 KB
Monthly Cost zł15/mo

These scripts may cost more than they're worth

  • Unattributable adds 628ms and costs ~zł15/month

Unattributable takes 628ms 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

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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