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https://rabatex.pl

Performance

· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
2
REVIEW
7
PASS
11
INFO
4

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

Mobile Desktop
78
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.

411 ms

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

831 ms

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

58 ms

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

0.500

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

725 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.

3.01 s

Page Load Progression

387 ms
773 ms
1.2 s
1.5 s
1.9 s
2.3 s
2.7 s
3.1 s
Checks
24
11 PASS 7 REVIEW 2 FIX
D
JS Bundles
Action
16 scripts, 413 KB unused
FIX
16 scripts, 413 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-LT8G...: 130 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-LT8G...: 69 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-P3Z...: 64 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://analytics.tiktok.com/i18n/pixel/static/mai...: 56 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://connect.facebook.net/en_US/fbevents.js: 38 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 413 KB
413 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-LT8GX193FS&cx=c&gtm=4e6a72194 KB130 KB (67%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-LT8GX193FS193 KB69 KB (36%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-P3ZWDN5R121 KB64 KB (53%)✓3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWU2MzIzODM0MQ.js115 KB56 KB (49%)✓3rd
https://connect.facebook.net/en_US/fbevents.js110 KB38 KB (34%)✓3rd
https://connect.facebook.net/signals/config/1443563884490347?v=2.9.415&r=stable&domain=rabatex.pl&hme=a4c28c8787325ac3f8f9eac68364f47df2a8c4266e43177443e5d7f6289c9774&ex_m=117%2C240%2C170%2C27%2C81%2C82%2C161%2C77%2C76%2C11%2C180%2C101%2C20%2C152%2C140%2C46%2C84%2C89%2C148%2C175%2C182%2C8%2C4%2C5%2C7%2C6%2C3%2C102%2C114%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C162%2C86%2C125%2C22%2C24%2C51%2C47%2C49%2C48%2C94%2C103%2C107%2C123%2C159%2C163%2C53%2C124%2C29%2C26%2C132%2C78%2C43%2C165%2C164%2C166%2C156%2C154%2C30%2C42%2C66%2C122%2C177%2C79%2C21%2C127%2C92%2C75%2C23%2C96%2C97%2C129%2C95%2C150%2C149%2C153%2C108%2C176%2C179%2C41%2C56%2C126%2C54%2C160%2C71%2C184%2C109%2C183%2C209%2C254%2C83%2C273%2C272%2C271%2C14%2C25%2C28%2C40%2C62%2C116%2C68%2C10%2C72%2C110%2C111%2C112%2C118%2C143%2C38%2C36%2C145%2C146%2C147%2C142%2C141%2C171%2C85%2C174%2C172%2C173%2C57%2C67%2C136%2C19%2C178%2C52%2C322%2C323%2C324%2C321%2C337%2C359%2C247%2C236%2C69%2C237%2C235%2C362%2C353%2C59%2C248%2C120%2C144%2C91%2C134%2C61%2C133%2C139%2C138%2C65%2C73%2C167%2C87%2C88%2C128%2C44%2C39%2C60%2C63%2C113%2C181%2C1%2C137%2C16%2C135%2C12%2C2%2C64%2C104%2C15%2C74%2C70%2C131%2C100%2C99%2C186%2C187%2C105%2C106%2C9%2C115%2C185%2C58%2C157%2C98%2C90%2C80%2C130%2C119%2C168%2C50%2C158%2C0%2C93%2C151%2C155%2C169%2C45%2C121%2C13%2C188102 KB34 KB (34%)✓3rd
https://rabatex.pl/assets/js/jquery-3.7.1.min.js32 KB22 KB (69%)✓1st
https://rabatex.pl/assets/js/webpush.js?v=0.0.58 KB—✓1st
https://analytics.tiktok.com/i18n/pixel/events.js?sdkid=DA60OTJC77UC1JSQRN00&lib=ttq3 KB—✓3rd
https://rabatex.pl/assets/js/mobile-navbar.js?v=0.0.23 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

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

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

F
Page Weight Inventory
Action
83 resources · 1.8 MB · 413 KB savings available
FIX
83 resources · 1.8 MB · 413 KB savings available
Warning::
Page weight 1.8 MB exceeds 1 MB target by 797 KB
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~413 KB of savings available
Warning::
25 third-party resources (50% of weight)
83 resources · 1.8 MiB · 25 third-party 796.8 KiB over 1MB target
JavaScript 55% · 995.9 KiB
Font 22% · 405.1 KiB
Image 17% · 317.6 KiB
CSS 4% · 74.6 KiB
Document 1% · 22.0 KiB
Other 0% · 5.6 KiB

~412.8 KiB of savings available

Remove unused JavaScript: 412.8 KiB
C
Page Weight Budget
Action
1.8 MB transferred, 83 requests
REVIEW
1.8 MB transferred, 83 requests
Info::
Page weighs 4.4 MB (1.8 MB transferred)
Warning::
JavaScript is 996 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 996 KB
Info::
Fonts are 405 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 405 KB
Info::
83 HTTP requests
Info::
Estimated 0.37 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
83 requests
0.37 g CO2 per page load
JavaScript 995.9 KiB 55%
Fonts 405.1 KiB 22%
Images 315.2 KiB 17%
CSS 74.6 KiB 4%
HTML 20.7 KiB 1%
Other 4.2 KiB 0%
Other 3.5 KiB 0%
Other 822 B 0%
Other 687 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

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

B
Third-Party Impact
50% third-party, 0 ms blocking
REVIEW
50% third-party, 0 ms blocking
Warning::
Third-party code accounts for 50% of page weight (913.4 KiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
50%
50%
First-party Third-party
C
Image Optimization
Action
40 images, 0 KB saveable
REVIEW
40 images, 0 KB saveable
Warning::
https://rabatex.pl/media/resize/300x200/img/1e3EhK... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/6PGHPs... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/C2KCE3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/ol1Fna... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/assets/img/leadgroup-logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/_UDv40... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/ukt2Gb... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/assets/img/rabatex_white_sm.web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/assets/img/grafiki/grafika_pion... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/BMOoWm... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/xeE5BD... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://rabatex.pl/media/resize/300x200/img/DqYht1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
40 images 315 KB
0 oversized -0 KB
11 legacy format
12 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

B
JS Execution Cost
879ms total JS execution
REVIEW
879ms total JS execution
Warning::
https://rabatex.pl/: 271ms CPU time
Info::
Unattributable: 150ms CPU time
Info::
https://analytics.tiktok.com/i18n/pixel/static/mai...: 143ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-LT8G...: 104ms CPU time
Info::
https://connect.facebook.net/signals/config/144356...: 78ms CPU time
Warning::
Third-party scripts: 459ms (52% of total)

Main Thread Breakdown

Script Evaluation 46% Other 19% Style & Layout 15% Script Parsing & Compilation 11% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://rabatex.pl/271ms7ms2ms1st
Unattributable150ms3ms0ms1st
https://analytics.tiktok.com/i18n/pixel/static/main.MWU2MzIzODM0MQ.js143ms98ms43ms3rd
https://www.googletagmanager.com/gtag/js?id=G-LT8GX193FS104ms91ms12ms3rd
https://connect.facebook.net/signals/config/1443563884490347?v=2.9.415&r=stable&domain=rabatex.pl&hme=a4c28c8787325ac3f8f9eac68364f47df2a8c4266e43177443e5d7f6289c9774&ex_m=117%2C240%2C170%2C27%2C81%2C82%2C161%2C77%2C76%2C11%2C180%2C101%2C20%2C152%2C140%2C46%2C84%2C89%2C148%2C175%2C182%2C8%2C4%2C5%2C7%2C6%2C3%2C102%2C114%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C162%2C86%2C125%2C22%2C24%2C51%2C47%2C49%2C48%2C94%2C103%2C107%2C123%2C159%2C163%2C53%2C124%2C29%2C26%2C132%2C78%2C43%2C165%2C164%2C166%2C156%2C154%2C30%2C42%2C66%2C122%2C177%2C79%2C21%2C127%2C92%2C75%2C23%2C96%2C97%2C129%2C95%2C150%2C149%2C153%2C108%2C176%2C179%2C41%2C56%2C126%2C54%2C160%2C71%2C184%2C109%2C183%2C209%2C254%2C83%2C273%2C272%2C271%2C14%2C25%2C28%2C40%2C62%2C116%2C68%2C10%2C72%2C110%2C111%2C112%2C118%2C143%2C38%2C36%2C145%2C146%2C147%2C142%2C141%2C171%2C85%2C174%2C172%2C173%2C57%2C67%2C136%2C19%2C178%2C52%2C322%2C323%2C324%2C321%2C337%2C359%2C247%2C236%2C69%2C237%2C235%2C362%2C353%2C59%2C248%2C120%2C144%2C91%2C134%2C61%2C133%2C139%2C138%2C65%2C73%2C167%2C87%2C88%2C128%2C44%2C39%2C60%2C63%2C113%2C181%2C1%2C137%2C16%2C135%2C12%2C2%2C64%2C104%2C15%2C74%2C70%2C131%2C100%2C99%2C186%2C187%2C105%2C106%2C9%2C115%2C185%2C58%2C157%2C98%2C90%2C80%2C130%2C119%2C168%2C50%2C158%2C0%2C93%2C151%2C155%2C169%2C45%2C121%2C13%2C18878ms69ms8ms3rd
https://connect.facebook.net/en_US/fbevents.js70ms58ms8ms3rd
https://scripts.clarity.ms/0.8.72-beta/clarity.js64ms57ms2ms3rd
B
Asset Compression
2 of 2 asset hosts still on gzip
REVIEW
2 of 2 asset hosts still on gzip
Info::
analytics.tiktok.com serves assets with gzip; brotli would be ~20% smaller (assets: 5)
Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.
Got: analytics.tiktok.com (application/javascript)
Info::
www.googletagmanager.com serves assets with gzip; brotli would be ~20% smaller (assets: 3)
Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.
Got: www.googletagmanager.com (application/javascript)
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.
B
HTTP Caching
max-age=0, private, must-revalidate
REVIEW
max-age=0, private, must-revalidate
Info::
Cache-Control header is set
Got: max-age=0, private, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0, private, must-revalidate

DirectiveValueMeaning
max-age0Cache for 0 seconds
private—Only browser cache, not CDN/proxy
must-revalidate—Must recheck with server after expiry
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
8 fonts (405 KB)
PASS
8 fonts (405 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

405 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 411 ms LCP 831 mshttps://rabatex.pl/assets/css/fonts/poppins-v24-latin_latin-ext-600.woff2poppins-v24-latin_latin... https://rabatex.pl/assets/css/fonts/poppins-v24-latin_latin-ext-600.woff2 — 11.2 KiB — 36 ms — font-display: swaphttps://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-solid-900.woff2 — 111.0 KiB — 32 ms — font-display: swaphttps://rabatex.pl/assets/css/fonts/inter-v20-latin_latin-ext-600.woff2inter-v20-latin_latin-e... https://rabatex.pl/assets/css/fonts/inter-v20-latin_latin-ext-600.woff2 — 51.7 KiB — 50 ms — font-display: swaphttps://rabatex.pl/assets/css/fonts/inter-v20-latin_latin-ext-700.woff2inter-v20-latin_latin-e... https://rabatex.pl/assets/css/fonts/inter-v20-latin_latin-ext-700.woff2 — 51.9 KiB — 52 ms — font-display: swaphttps://rabatex.pl/assets/css/fonts/inter-v20-latin_latin-ext-regular.woff2inter-v20-latin_latin-e... https://rabatex.pl/assets/css/fonts/inter-v20-latin_latin-ext-regular.woff2 — 50.0 KiB — 53 ms — font-display: swaphttps://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-brands-400.woff2 — 99.4 KiB — 62 ms — font-display: swaphttps://rabatex.pl/assets/css/fonts/poppins-v24-latin_latin-ext-700.woff2poppins-v24-latin_latin... https://rabatex.pl/assets/css/fonts/poppins-v24-latin_latin-ext-700.woff2 — 10.9 KiB — 29 ms — font-display: swaphttps://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-regular-400.woff2 — 19.0 KiB — 26 ms — font-display: swap
poppins-v24-latin_latin... woff2 swap
Size 11 KB
Load time 36 ms
Start 414 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 111 KB
Load time 32 ms
Start 542 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
inter-v20-latin_latin-e... woff2 swap
Size 52 KB
Load time 50 ms
Start 543 ms
Risk FOUT — text flashes from fallback to web font
inter-v20-latin_latin-e... woff2 swap
Size 52 KB
Load time 52 ms
Start 543 ms
Risk FOUT — text flashes from fallback to web font
inter-v20-latin_latin-e... woff2 swap
Size 50 KB
Load time 53 ms
Start 543 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 99 KB
Load time 62 ms
Start 543 ms
Risk FOUT — text flashes from fallback to web font
poppins-v24-latin_latin... woff2 swap
Size 11 KB
Load time 29 ms
Start 544 ms
Risk FOUT — text flashes from fallback to web font
fa-regular-400.woff2 woff2 swap
Size 19 KB
Load time 26 ms
Start 2.8 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)

Fixing the unchecked items could save ~55 KB and ~110 ms

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 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: max-age=0, private, must-revalidate
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
83 requests over 4855ms
INFO
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https://region1.analytics.google.com/g/collect?v=2&tid=G-LT8GX193FS&gtm=45je6a80h2v9239702218za200zb9260163682zd9260163682xf1&_p=1791736086820&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAgAACQC&_prs=ok&cid=2029347252.1791736087&frm=0&ibt=1&ngs=1&pscdl=noapi&rcb=0&sr=800x600&uaa=x86&uab=64&uafvl=Not%2520A(Brand%3B99.0.0.0%7CChromium%3B154.0.8037.92&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=2&tag_exp=115616985~115938465~115938468~118897920~118897930~120213116~120385423~120469145~120469153~121046263~121046271~121246026~121246034&sid=1791736087&sct=1&seg=0&dl=https%3A%2F%2Frabatex.pl%2F&dt=Rabatex%20-%20Cashback%20i%20kody%20rabatow%20w%20jednym%20miejscu!&en=ads_conversion_PAGE_VIEW_1&_c=1&_et=6&tfd=818 — 204 — 48 B — 71 ms — 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— 200 — 94 B — 87 ms — h2https://connect.facebook.net/signals/config/1443563884490347?v=2.9.415&r=stable&domain=rabatex.pl&hme=a4c28c8787325ac3f8f9eac68364f47df2a8c4266e43177443e5d7f6289c9774&ex_m=117%2C240%2C170%2C27%2C81%2C82%2C161%2C77%2C76%2C11%2C180%2C101%2C20%2C152%2C140%2C46%2C84%2C89%2C148%2C175%2C182%2C8%2C4%2C5%2C7%2C6%2C3%2C102%2C114%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C162%2C86%2C125%2C22%2C24%2C51%2C47%2C49%2C48%2C94%2C103%2C107%2C123%2C159%2C163%2C53%2C124%2C29%2C26%2C132%2C78%2C43%2C165%2C164%2C166%2C156%2C154%2C30%2C42%2C66%2C122%2C177%2C79%2C21%2C127%2C92%2C75%2C23%2C96%2C97%2C129%2C95%2C150%2C149%2C153%2C108%2C176%2C179%2C41%2C56%2C126%2C54%2C160%2C71%2C184%2C109%2C183%2C209%2C254%2C83%2C273%2C272%2C271%2C14%2C25%2C28%2C40%2C62%2C116%2C68%2C10%2C72%2C110%2C111%2C112%2C118%2C143%2C38%2C36%2C145%2C146%2C147%2C142%2C141%2C171%2C85%2C174%2C172%2C173%2C57%2C67%2C136%2C19%2C178%2C52%2C322%2C323%2C324%2C321%2C337%2C359%2C247%2C236%2C69%2C237%2C235%2C362%2C353%2C59%2C248%2C120%2C144%2C91%2C134%2C61%2C133%2C139%2C138%2C65%2C73%2C167%2C87%2C88%2C128%2C44%2C39%2C60%2C63%2C113%2C181%2C1%2C137%2C16%2C135%2C12%2C2%2C64%2C104%2C15%2C74%2C70%2C131%2C100%2C99%2C186%2C187%2C105%2C106%2C9%2C115%2C185%2C58%2C157%2C98%2C90%2C80%2C130%2C119%2C168%2C50%2C158%2C0%2C93%2C151%2C155%2C169%2C45%2C121%2C13%2C188connect.facebook.net/signals/config... https://connect.facebook.net/signals/config/1443563884490347?v=2.9.415&r=stable&domain=rabatex.pl&hme=a4c28c8787325ac3f8f9eac68364f47df2a8c4266e43177443e5d7f6289c9774&ex_m=117%2C240%2C170%2C27%2C81%2C82%2C161%2C77%2C76%2C11%2C180%2C101%2C20%2C152%2C140%2C46%2C84%2C89%2C148%2C175%2C182%2C8%2C4%2C5%2C7%2C6%2C3%2C102%2C114%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C162%2C86%2C125%2C22%2C24%2C51%2C47%2C49%2C48%2C94%2C103%2C107%2C123%2C159%2C163%2C53%2C124%2C29%2C26%2C132%2C78%2C43%2C165%2C164%2C166%2C156%2C154%2C30%2C42%2C66%2C122%2C177%2C79%2C21%2C127%2C92%2C75%2C23%2C96%2C97%2C129%2C95%2C150%2C149%2C153%2C108%2C176%2C179%2C41%2C56%2C126%2C54%2C160%2C71%2C184%2C109%2C183%2C209%2C254%2C83%2C273%2C272%2C271%2C14%2C25%2C28%2C40%2C62%2C116%2C68%2C10%2C72%2C110%2C111%2C112%2C118%2C143%2C38%2C36%2C145%2C146%2C147%2C142%2C141%2C171%2C85%2C174%2C172%2C173%2C57%2C67%2C136%2C19%2C178%2C52%2C322%2C323%2C324%2C321%2C337%2C359%2C247%2C236%2C69%2C237%2C235%2C362%2C353%2C59%2C248%2C120%2C144%2C91%2C134%2C61%2C133%2C139%2C138%2C65%2C73%2C167%2C87%2C88%2C128%2C44%2C39%2C60%2C63%2C113%2C181%2C1%2C137%2C16%2C135%2C12%2C2%2C64%2C104%2C15%2C74%2C70%2C131%2C100%2C99%2C186%2C187%2C105%2C106%2C9%2C115%2C185%2C58%2C157%2C98%2C90%2C80%2C130%2C119%2C168%2C50%2C158%2C0%2C93%2C151%2C155%2C169%2C45%2C121%2C13%2C188 — 200 — 102.2 KiB — 770 ms — h3https://analytics.tiktok.com/i18n/pixel/static/identify_0504602d.jsanalytics.tiktok.com/i18n/pixel/sta... https://analytics.tiktok.com/i18n/pixel/static/identify_0504602d.js — 200 — 39.5 KiB — 9 ms — h2https://analytics-ipv6.tiktokw.us/ipv6/enrich_ipv6analytics-ipv6.tiktokw.us/ipv6/enri... https://analytics-ipv6.tiktokw.us/ipv6/enrich_ipv6 — 200 — 979 B — 239 ms — h2https://analytics.tiktok.com/api/v2/pixelanalytics.tiktok.com/api/v2/pixel https://analytics.tiktok.com/api/v2/pixel — 200 — 924 B — 355 ms — h2https://analytics.tiktok.com/api/v2/pixelanalytics.tiktok.com/api/v2/pixel https://analytics.tiktok.com/api/v2/pixel — 200 — 946 B — 191 ms — h2https://scripts.clarity.ms/0.8.72-beta/clarity.jsscripts.clarity.ms/0.8.72-beta/clar... https://scripts.clarity.ms/0.8.72-beta/clarity.js — 200 — 25.5 KiB — 103 ms — h2https://h.clarity.ms/collecth.clarity.ms/collect https://h.clarity.ms/collect — 204 — 274 B — 453 ms — http/1.1https://analytics.tiktok.com/api/v2/pixel/actanalytics.tiktok.com/api/v2/pixel/a... https://analytics.tiktok.com/api/v2/pixel/act — 200 — 921 B — 144 ms — h2https://www.facebook.com/tr/www.facebook.com/tr/ https://www.facebook.com/tr/ — 200 — 20 B — 59 ms — h3https://rabatex.pl/assets/faviconpck/favicon-32x32.ico/assets/faviconpck/favicon-32x32.ic... https://rabatex.pl/assets/faviconpck/favicon-32x32.ico — 200 — 2.3 KiB — 26 ms — h3https://rabatex.pl/assets/faviconpck/favicon-32x32.ico/assets/faviconpck/favicon-32x32.ic... https://rabatex.pl/assets/faviconpck/favicon-32x32.ico — 200 — 0 B — 1 ms — h3https://h.clarity.ms/collecth.clarity.ms/collect https://h.clarity.ms/collect — 204 — 274 B — 104 ms — http/1.1data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3… — 200 — 0 B — 0 ms — datahttps://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-regular-400.woff2/assets/plugin/fontawesome/webfonts... https://rabatex.pl/assets/plugin/fontawesome/webfonts/fa-regular-400.woff2 — 200 — 19.0 KiB — 26 ms — h3https://h.clarity.ms/collecth.clarity.ms/collect https://h.clarity.ms/collect — 204 — 274 B — 101 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
52% of JavaScript execution is third-party
First-party Third-party 459ms · 547KB · zł11/mo
analytics.tiktok.com
Other
Optional
Execution 143ms
Transfer 115 KB
Unused 49%
Monthly Cost zł4/mo
Google Tag Manager
Tag Manager
Optional
Execution 104ms
Transfer 193 KB
Unused 36%
Monthly Cost zł3/mo
Facebook Pixel
Advertising
Optional
Execution 78ms
Transfer 102 KB
Unused 34%
Monthly Cost zł2/mo
Facebook Pixel
Advertising
Optional
Execution 70ms
Transfer 110 KB
Unused 34%
Monthly Cost zł2/mo
Microsoft Clarity
Session Replay
Optional
Execution 64ms
Transfer 25 KB
Monthly Cost zł2/mo

52% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

How third-party costs are calculated

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-09-12 — 2026-10-09)

LCP (p75)

838 ms

97% good

INP (p75)

0 ms

0% good

CLS (p75)

0.010

81% good

FCP (p75)

865 ms

TTFB (p75)

788 ms

Image Optimization
42 images, 256 KB total, 131 KB wasted
INFO

Image Optimization Audit

Total Images

42

Total Size

256 KB

Oversized

6

Wasted

131 KB

5 missing alt text 41 missing dimensions 11 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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