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https://www.bleriotpardubice.cz

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
3
REVIEW
7
PASS
9
INFO
3

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

Mobile Desktop
81
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.

1.92 s

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

2.00 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.

1.92 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.

3.38 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
22
9 PASS 7 REVIEW 3 FIX
F
Page Weight Budget
Action
9.1 MB transferred, 67 requests
FIX
9.1 MB transferred, 67 requests
Critical::
Page weighs 13.7 MB (9.1 MB transferred)
Warning::
Images are 7.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 7.1 MB
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
CSS is 506 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 506 KB
Info::
Fonts are 269 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 269 KB
Info::
67 HTTP requests
Info::
Estimated 1.9 g CO2 per page load
9.1 MB / 2.4 MB budget
9.1 MB transferred
67 requests
1.9 g CO2 per page load
Images 7.1 MiB 78%
JavaScript 1.2 MiB 13%
CSS 506.1 KiB 5%
Fonts 269.4 KiB 3%
HTML 51.6 KiB 1%
Other 14.8 KiB 0%
Other 45 B 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

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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

F
JS Bundles
Action
11 scripts, 775 KB unused
FIX
11 scripts, 775 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/A7KpaEA...: 178 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/A7KpaEA...: 178 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/A7KpaEA...: 178 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/A7KpaEA...: 178 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://maps.googleapis.com/maps/api/js?key=AIzaSy...: 63 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 775 KB
775 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/A7KpaEASfhDcK0nXxgQEyyYv/recaptcha__en.js374 KB178 KB (48%)✓3rd
https://www.gstatic.com/recaptcha/releases/A7KpaEASfhDcK0nXxgQEyyYv/recaptcha__en.js374 KB178 KB (48%)✓3rd
https://www.gstatic.com/recaptcha/releases/A7KpaEASfhDcK0nXxgQEyyYv/recaptcha__en.js0 KB178 KB (48%)✓3rd
https://www.gstatic.com/recaptcha/releases/A7KpaEASfhDcK0nXxgQEyyYv/recaptcha__en.js0 KB178 KB (48%)✓3rd
https://maps.googleapis.com/maps/api/js?key=AIzaSyDo5XtRqXPE2-rQGDJ_tug8WI1xeZd0Qcc&callback=initMap100 KB63 KB (63%)✓3rd
https://img.wedos.website/bundles/WEDOS_skeleton.bundle.js141 KB—✓3rd
https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=explicit1 KB—✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js33 KB—✓3rd
https://www.menicka.cz/js/js.jquery.magnific-popup.min.js?v=6.13620 KB—✓3rd
https://www.googletagmanager.com/gtag/js?id=G-ZY5G8PYJNY177 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

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

D
Page Weight Inventory
Action
67 resources · 9.1 MB · 775 KB savings available
FIX
67 resources · 9.1 MB · 775 KB savings available
Warning::
Page weight 9.1 MB exceeds 1 MB target by 8.1 MB
Got: 9.1 MB Expected: ≤ 1 MB
Info::
~775 KB of savings available
Info::
31 third-party resources (22% of weight)
Info::
21 resources over 200KB
67 resources · 9.1 MiB · 31 third-party 8.1 MiB over 1MB target
Image 78% · 7.1 MiB
JavaScript 13% · 1.2 MiB
CSS 5% · 506.1 KiB
Font 3% · 269.4 KiB
Document 1% · 51.6 KiB
Other 0% · 45 B

~774.7 KiB of savings available

Remove unused JavaScript: 774.7 KiB
C
Image Optimization
Action
37 images, 0 KB saveable
REVIEW
37 images, 0 KB saveable
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bleriotpardubice.cz/images/uploads/862... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
37 images 7.1 MB
0 oversized -0 KB
35 legacy format
31 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

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
992ms total JS execution
REVIEW
992ms total JS execution
Warning::
https://www.bleriotpardubice.cz/: 365ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/A7KpaEA...: 342ms CPU time
Info::
Unattributable: 183ms CPU time
Info::
https://img.wedos.website/bundles/WEDOS_skeleton.b...: 103ms CPU time
Info::
Third-party scripts: 445ms (45% of total)

Main Thread Breakdown

Script Evaluation 45% Other 28% Style & Layout 14% Script Parsing & Compilation 7% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.bleriotpardubice.cz/365ms56ms1ms1st
https://www.gstatic.com/recaptcha/releases/A7KpaEASfhDcK0nXxgQEyyYv/recaptcha__en.js342ms298ms37ms3rd
Unattributable183ms2ms0ms1st
https://img.wedos.website/bundles/WEDOS_skeleton.bundle.js103ms78ms22ms3rd
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
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main 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
Main HTML max-age=360 (~6min)
REVIEW
Main HTML max-age=360 (~6min)
Info::
Main HTML cached for 6 minutes -- mild staleness risk
Got: private, max-age=360, must-revalidate
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
Third-Party Impact
22% third-party, 0 ms blocking
PASS
22% third-party, 0 ms blocking
Info::
Third-party code accounts for 22% of page weight (2.0 MiB of 9.1 MiB)
Info::
Third-party blocking time is low (0 ms)
78%
22%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
7 fonts (269 KB)
PASS
7 fonts (269 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

269 KB total

Render-blocking

0

of 7

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 FCP 1.9 s LCP 2.0 shttps://img.wedos.website/bundles/af7ae505a9eed503f8b8e6982036873e.woff2af7ae505a9eed503f8b8e69... https://img.wedos.website/bundles/af7ae505a9eed503f8b8e6982036873e.woff2 — 75.9 KiB — 47 ms — font-display: swaphttps://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2JTUSjIg1_i6t8kCHKm459Wl... https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2 — 34.7 KiB — 25 ms — font-display: swaphttps://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WdhyyTh89ZNpQ.woff2JTUSjIg1_i6t8kCHKm459Wd... https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WdhyyTh89ZNpQ.woff2 — 66.7 KiB — 38 ms — font-display: swapdata:application/font-woff;base64,d09GRgABAAAAAHQ0ABQAAAABC0AAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAABCQVNFA…font-woff;base64,d09GRg... data:application/font-woff;base64,d09GRgABAAAAAHQ0ABQAAAABC0AAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAABCQVNFA… — 29.1 KiB — 76 ms — font-display: swapdata:application/font-woff;base64,d09GRgABAAAAAHS0ABQAAAABCHwAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAABCQVNFA…font-woff;base64,d09GRg... data:application/font-woff;base64,d09GRgABAAAAAHS0ABQAAAABCHwAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAABCQVNFA… — 29.2 KiB — 60 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 29 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swap
af7ae505a9eed503f8b8e69... woff2 swap
Size 76 KB
Load time 47 ms
Start 681 ms
Risk FOUT — text flashes from fallback to web font
JTUSjIg1_i6t8kCHKm459Wl... woff2 swap
Size 35 KB
Load time 25 ms
Start 684 ms
Risk FOUT — text flashes from fallback to web font
JTUSjIg1_i6t8kCHKm459Wd... woff2 swap
Size 67 KB
Load time 38 ms
Start 685 ms
Risk FOUT — text flashes from fallback to web font
font-woff;base64,d09GRg... woff swap
Size 29 KB
Load time 76 ms
Start 701 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
font-woff;base64,d09GRg... woff swap
Size 29 KB
Load time 60 ms
Start 719 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 29 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 3.2 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 ~17 KB and ~34 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+
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: User-Agent,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+
HTTP Caching
max-age=360 (6 minutes)
PASS
max-age=360 (6 minutes)
Info::
Cache-Control header is set
Got: private, max-age=360, must-revalidate
Info::
Effective TTL: 6 minutes (max-age=360)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

private, max-age=360, must-revalidate

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age360Cache for 6 minutes
must-revalidate—Must recheck with server after expiry
Effective TTL: 360 seconds
Network Waterfall
67 requests over 3152ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.9 s LCP 2.0 shttps://www.bleriotpardubice.cz// https://www.bleriotpardubice.cz/ — 200 — 7.4 KiB — 327 ms — h2https://img.wedos.website/bundles/WEDOS_skeleton.cssimg.wedos.website/bundles/WEDOS_ske... https://img.wedos.website/bundles/WEDOS_skeleton.css — 200 — 443.8 KiB — 216 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536a95c89f_Menu01.jpeg?0.8101522828562706/images/uploads/8621/660536a95c89f_... https://www.bleriotpardubice.cz/images/uploads/8621/660536a95c89f_Menu01.jpeg?0.8101522828562706 — 200 — 176.9 KiB — 673 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605372e2b92e_Menu04.jpeg?0.9066317069237162/images/uploads/8621/6605372e2b92e_... https://www.bleriotpardubice.cz/images/uploads/8621/6605372e2b92e_Menu04.jpeg?0.9066317069237162 — 200 — 228.7 KiB — 949 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605376a61859_Menu07.jpeg?0.3535754608509083/images/uploads/8621/6605376a61859_... https://www.bleriotpardubice.cz/images/uploads/8621/6605376a61859_Menu07.jpeg?0.3535754608509083 — 200 — 220.5 KiB — 927 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537a856819_Menu10.jpeg?0.6591023638497486/images/uploads/8621/660537a856819_... https://www.bleriotpardubice.cz/images/uploads/8621/660537a856819_Menu10.jpeg?0.6591023638497486 — 200 — 239.6 KiB — 940 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605380a4d62b_Menu13.jpeg?0.395757143733213/images/uploads/8621/6605380a4d62b_... https://www.bleriotpardubice.cz/images/uploads/8621/6605380a4d62b_Menu13.jpeg?0.395757143733213 — 200 — 143.5 KiB — 854 ms — h2https://img.wedos.website/bundles/WEDOS_skeleton.bundle.jsimg.wedos.website/bundles/WEDOS_ske... https://img.wedos.website/bundles/WEDOS_skeleton.bundle.js — 200 — 140.5 KiB — 785 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/66053865f0b5a_Menu16.jpeg?0.29381932297853197/images/uploads/8621/66053865f0b5a_... https://www.bleriotpardubice.cz/images/uploads/8621/66053865f0b5a_Menu16.jpeg?0.29381932297853197 — 200 — 272.7 KiB — 938 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.8665693067074356/images/uploads/8621/660536c5c7e51_... https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.8665693067074356 — 200 — 203.0 KiB — 911 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537436629c_Menu05.jpeg?0.07922914331214881/images/uploads/8621/660537436629c_... https://www.bleriotpardubice.cz/images/uploads/8621/660537436629c_Menu05.jpeg?0.07922914331214881 — 200 — 276.5 KiB — 947 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605377e96ca9_Menu08.jpeg?0.7613425981697357/images/uploads/8621/6605377e96ca9_... https://www.bleriotpardubice.cz/images/uploads/8621/6605377e96ca9_Menu08.jpeg?0.7613425981697357 — 200 — 227.2 KiB — 924 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537d237b08_Menu11.jpeg?0.7648099983121488/images/uploads/8621/660537d237b08_... https://www.bleriotpardubice.cz/images/uploads/8621/660537d237b08_Menu11.jpeg?0.7648099983121488 — 200 — 231.1 KiB — 929 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605382172224_Menu14.jpeg?0.9725510279331899/images/uploads/8621/6605382172224_... https://www.bleriotpardubice.cz/images/uploads/8621/6605382172224_Menu14.jpeg?0.9725510279331899 — 200 — 275.7 KiB — 937 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.12427469639817246/images/uploads/8621/660536c5c7e51_... https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.12427469639817246 — 200 — 203.0 KiB — 925 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536dceb6b9_Menu03.jpeg?0.05032101934372313/images/uploads/8621/660536dceb6b9_... https://www.bleriotpardubice.cz/images/uploads/8621/660536dceb6b9_Menu03.jpeg?0.05032101934372313 — 200 — 239.4 KiB — 929 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/66053756178e1_Menu06.jpeg?0.7141229036769823/images/uploads/8621/66053756178e1_... https://www.bleriotpardubice.cz/images/uploads/8621/66053756178e1_Menu06.jpeg?0.7141229036769823 — 200 — 233.5 KiB — 930 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605379441eed_Menu09.jpeg?0.05033650806636025/images/uploads/8621/6605379441eed_... https://www.bleriotpardubice.cz/images/uploads/8621/6605379441eed_Menu09.jpeg?0.05033650806636025 — 200 — 208.3 KiB — 925 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537ec4b17a_Menu12.jpeg?0.4751264595204612/images/uploads/8621/660537ec4b17a_... https://www.bleriotpardubice.cz/images/uploads/8621/660537ec4b17a_Menu12.jpeg?0.4751264595204612 — 200 — 205.0 KiB — 930 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605384385d69_Menu15.jpeg?0.9351405717791601/images/uploads/8621/6605384385d69_... https://www.bleriotpardubice.cz/images/uploads/8621/6605384385d69_Menu15.jpeg?0.9351405717791601 — 200 — 204.6 KiB — 932 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.8453039368174589/images/uploads/8621/6551c5b77b2a2_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.8453039368174589 — 200 — 175.1 KiB — 899 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.6157722873725298/images/uploads/8621/6551c5b77b2a2_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.6157722873725298 — 200 — 175.1 KiB — 905 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c5fa9dc81_38980ec6-4456-46aa-a06d-273900ca74ee.jpeg?0.9894869160464725/images/uploads/8621/6551c5fa9dc81_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c5fa9dc81_38980ec6-4456-46aa-a06d-273900ca74ee.jpeg?0.9894869160464725 — 200 — 182.0 KiB — 923 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca10b9fc8_7c139eae-8527-425b-b0d5-006e93f1f1d1.jpeg?0.5758826137373652/images/uploads/8621/6551ca10b9fc8_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca10b9fc8_7c139eae-8527-425b-b0d5-006e93f1f1d1.jpeg?0.5758826137373652 — 200 — 185.3 KiB — 893 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/655b5387238a1_536053be-db29-4363-96ee-a0cdaab2e41a.jpeg?0.07499209787168803/images/uploads/8621/655b5387238a1_... https://www.bleriotpardubice.cz/images/uploads/8621/655b5387238a1_536053be-db29-4363-96ee-a0cdaab2e41a.jpeg?0.07499209787168803 — 200 — 188.2 KiB — 886 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c9c0014fd_0e2ed154-0405-4ef0-97de-0949fe94f4ed.jpeg?0.6460699404012054/images/uploads/8621/6551c9c0014fd_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c9c0014fd_0e2ed154-0405-4ef0-97de-0949fe94f4ed.jpeg?0.6460699404012054 — 200 — 218.0 KiB — 920 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca3b37234_26df5991-42d4-46d1-b8df-bc7df3a42aed.jpeg?0.5738459635088513/images/uploads/8621/6551ca3b37234_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca3b37234_26df5991-42d4-46d1-b8df-bc7df3a42aed.jpeg?0.5738459635088513 — 200 — 191.5 KiB — 932 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca59a1dc7_09718a1a-e359-4bbc-ba26-cc4fca1bd448.jpeg?0.28643133575705626/images/uploads/8621/6551ca59a1dc7_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca59a1dc7_09718a1a-e359-4bbc-ba26-cc4fca1bd448.jpeg?0.28643133575705626 — 200 — 169.3 KiB — 903 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca7ae5424_25753e9c-d395-43b7-a8a1-3ab4df756edb.jpeg?0.5364816206965719/images/uploads/8621/6551ca7ae5424_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca7ae5424_25753e9c-d395-43b7-a8a1-3ab4df756edb.jpeg?0.5364816206965719 — 200 — 142.1 KiB — 857 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca9789130_abc29908-763a-462b-8d03-e4fdd34cbe0d.jpeg?0.8246447370190386/images/uploads/8621/6551ca9789130_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca9789130_abc29908-763a-462b-8d03-e4fdd34cbe0d.jpeg?0.8246447370190386 — 200 — 176.7 KiB — 900 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 1.9 s LCP 2.0 shttps://www.bleriotpardubice.cz// https://www.bleriotpardubice.cz/ — 200 — 7.4 KiB — 327 ms — h2https://img.wedos.website/bundles/WEDOS_skeleton.cssimg.wedos.website/bundles/WEDOS_ske... https://img.wedos.website/bundles/WEDOS_skeleton.css — 200 — 443.8 KiB — 216 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536a95c89f_Menu01.jpeg?0.8101522828562706/images/uploads/8621/660536a95c89f_... https://www.bleriotpardubice.cz/images/uploads/8621/660536a95c89f_Menu01.jpeg?0.8101522828562706 — 200 — 176.9 KiB — 673 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605372e2b92e_Menu04.jpeg?0.9066317069237162/images/uploads/8621/6605372e2b92e_... https://www.bleriotpardubice.cz/images/uploads/8621/6605372e2b92e_Menu04.jpeg?0.9066317069237162 — 200 — 228.7 KiB — 949 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605376a61859_Menu07.jpeg?0.3535754608509083/images/uploads/8621/6605376a61859_... https://www.bleriotpardubice.cz/images/uploads/8621/6605376a61859_Menu07.jpeg?0.3535754608509083 — 200 — 220.5 KiB — 927 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537a856819_Menu10.jpeg?0.6591023638497486/images/uploads/8621/660537a856819_... https://www.bleriotpardubice.cz/images/uploads/8621/660537a856819_Menu10.jpeg?0.6591023638497486 — 200 — 239.6 KiB — 940 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605380a4d62b_Menu13.jpeg?0.395757143733213/images/uploads/8621/6605380a4d62b_... https://www.bleriotpardubice.cz/images/uploads/8621/6605380a4d62b_Menu13.jpeg?0.395757143733213 — 200 — 143.5 KiB — 854 ms — h2https://img.wedos.website/bundles/WEDOS_skeleton.bundle.jsimg.wedos.website/bundles/WEDOS_ske... https://img.wedos.website/bundles/WEDOS_skeleton.bundle.js — 200 — 140.5 KiB — 785 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/66053865f0b5a_Menu16.jpeg?0.29381932297853197/images/uploads/8621/66053865f0b5a_... https://www.bleriotpardubice.cz/images/uploads/8621/66053865f0b5a_Menu16.jpeg?0.29381932297853197 — 200 — 272.7 KiB — 938 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.8665693067074356/images/uploads/8621/660536c5c7e51_... https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.8665693067074356 — 200 — 203.0 KiB — 911 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537436629c_Menu05.jpeg?0.07922914331214881/images/uploads/8621/660537436629c_... https://www.bleriotpardubice.cz/images/uploads/8621/660537436629c_Menu05.jpeg?0.07922914331214881 — 200 — 276.5 KiB — 947 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605377e96ca9_Menu08.jpeg?0.7613425981697357/images/uploads/8621/6605377e96ca9_... https://www.bleriotpardubice.cz/images/uploads/8621/6605377e96ca9_Menu08.jpeg?0.7613425981697357 — 200 — 227.2 KiB — 924 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537d237b08_Menu11.jpeg?0.7648099983121488/images/uploads/8621/660537d237b08_... https://www.bleriotpardubice.cz/images/uploads/8621/660537d237b08_Menu11.jpeg?0.7648099983121488 — 200 — 231.1 KiB — 929 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605382172224_Menu14.jpeg?0.9725510279331899/images/uploads/8621/6605382172224_... https://www.bleriotpardubice.cz/images/uploads/8621/6605382172224_Menu14.jpeg?0.9725510279331899 — 200 — 275.7 KiB — 937 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.12427469639817246/images/uploads/8621/660536c5c7e51_... https://www.bleriotpardubice.cz/images/uploads/8621/660536c5c7e51_Menu02.jpeg?0.12427469639817246 — 200 — 203.0 KiB — 925 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660536dceb6b9_Menu03.jpeg?0.05032101934372313/images/uploads/8621/660536dceb6b9_... https://www.bleriotpardubice.cz/images/uploads/8621/660536dceb6b9_Menu03.jpeg?0.05032101934372313 — 200 — 239.4 KiB — 929 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/66053756178e1_Menu06.jpeg?0.7141229036769823/images/uploads/8621/66053756178e1_... https://www.bleriotpardubice.cz/images/uploads/8621/66053756178e1_Menu06.jpeg?0.7141229036769823 — 200 — 233.5 KiB — 930 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605379441eed_Menu09.jpeg?0.05033650806636025/images/uploads/8621/6605379441eed_... https://www.bleriotpardubice.cz/images/uploads/8621/6605379441eed_Menu09.jpeg?0.05033650806636025 — 200 — 208.3 KiB — 925 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/660537ec4b17a_Menu12.jpeg?0.4751264595204612/images/uploads/8621/660537ec4b17a_... https://www.bleriotpardubice.cz/images/uploads/8621/660537ec4b17a_Menu12.jpeg?0.4751264595204612 — 200 — 205.0 KiB — 930 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6605384385d69_Menu15.jpeg?0.9351405717791601/images/uploads/8621/6605384385d69_... https://www.bleriotpardubice.cz/images/uploads/8621/6605384385d69_Menu15.jpeg?0.9351405717791601 — 200 — 204.6 KiB — 932 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.8453039368174589/images/uploads/8621/6551c5b77b2a2_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.8453039368174589 — 200 — 175.1 KiB — 899 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.6157722873725298/images/uploads/8621/6551c5b77b2a2_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c5b77b2a2_a3b06e57-c481-4a60-ac38-abba7bbff7d5.jpeg?0.6157722873725298 — 200 — 175.1 KiB — 905 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c5fa9dc81_38980ec6-4456-46aa-a06d-273900ca74ee.jpeg?0.9894869160464725/images/uploads/8621/6551c5fa9dc81_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c5fa9dc81_38980ec6-4456-46aa-a06d-273900ca74ee.jpeg?0.9894869160464725 — 200 — 182.0 KiB — 923 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca10b9fc8_7c139eae-8527-425b-b0d5-006e93f1f1d1.jpeg?0.5758826137373652/images/uploads/8621/6551ca10b9fc8_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca10b9fc8_7c139eae-8527-425b-b0d5-006e93f1f1d1.jpeg?0.5758826137373652 — 200 — 185.3 KiB — 893 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/655b5387238a1_536053be-db29-4363-96ee-a0cdaab2e41a.jpeg?0.07499209787168803/images/uploads/8621/655b5387238a1_... https://www.bleriotpardubice.cz/images/uploads/8621/655b5387238a1_536053be-db29-4363-96ee-a0cdaab2e41a.jpeg?0.07499209787168803 — 200 — 188.2 KiB — 886 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551c9c0014fd_0e2ed154-0405-4ef0-97de-0949fe94f4ed.jpeg?0.6460699404012054/images/uploads/8621/6551c9c0014fd_... https://www.bleriotpardubice.cz/images/uploads/8621/6551c9c0014fd_0e2ed154-0405-4ef0-97de-0949fe94f4ed.jpeg?0.6460699404012054 — 200 — 218.0 KiB — 920 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca3b37234_26df5991-42d4-46d1-b8df-bc7df3a42aed.jpeg?0.5738459635088513/images/uploads/8621/6551ca3b37234_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca3b37234_26df5991-42d4-46d1-b8df-bc7df3a42aed.jpeg?0.5738459635088513 — 200 — 191.5 KiB — 932 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca59a1dc7_09718a1a-e359-4bbc-ba26-cc4fca1bd448.jpeg?0.28643133575705626/images/uploads/8621/6551ca59a1dc7_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca59a1dc7_09718a1a-e359-4bbc-ba26-cc4fca1bd448.jpeg?0.28643133575705626 — 200 — 169.3 KiB — 903 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca7ae5424_25753e9c-d395-43b7-a8a1-3ab4df756edb.jpeg?0.5364816206965719/images/uploads/8621/6551ca7ae5424_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca7ae5424_25753e9c-d395-43b7-a8a1-3ab4df756edb.jpeg?0.5364816206965719 — 200 — 142.1 KiB — 857 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551ca9789130_abc29908-763a-462b-8d03-e4fdd34cbe0d.jpeg?0.8246447370190386/images/uploads/8621/6551ca9789130_... https://www.bleriotpardubice.cz/images/uploads/8621/6551ca9789130_abc29908-763a-462b-8d03-e4fdd34cbe0d.jpeg?0.8246447370190386 — 200 — 176.7 KiB — 900 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6551cae3e0140_ebbbad1a-ba28-4c32-bbf9-4ec20d439c80.jpeg?0.5131048498450137/images/uploads/8621/6551cae3e0140_... https://www.bleriotpardubice.cz/images/uploads/8621/6551cae3e0140_ebbbad1a-ba28-4c32-bbf9-4ec20d439c80.jpeg?0.5131048498450137 — 200 — 199.0 KiB — 921 ms — 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h2https://maps.googleapis.com/maps/api/js?key=AIzaSyDo5XtRqXPE2-rQGDJ_tug8WI1xeZd0Qcc&callback=initMapmaps.googleapis.com/maps/api/js?key... https://maps.googleapis.com/maps/api/js?key=AIzaSyDo5XtRqXPE2-rQGDJ_tug8WI1xeZd0Qcc&callback=initMap — 200 — 100.4 KiB — 124 ms — h2https://fonts.googleapis.com/css?family=Montserrat:300,400,700,900fonts.googleapis.com/css?family=Mon... https://fonts.googleapis.com/css?family=Montserrat:300,400,700,900 — 200 — 1.1 KiB — 44 ms — h2https://fonts.googleapis.com/css?family=Faster+One|Gruppo|Montserrat+Subrayada:400,700|Open+Sans:100,300,400,700,800|Poiret+One|Raleway:100,200,300,400,700,900fonts.googleapis.com/css?family=Fas... https://fonts.googleapis.com/css?family=Faster+One|Gruppo|Montserrat+Subrayada:400,700|Open+Sans:100,300,400,700,800|Poiret+One|Raleway:100,200,300,400,700,900 — 200 — 2.5 KiB — 64 ms — h2https://www.bleriotpardubice.cz/images/uploads/8621/6544f505bb8c7_2023-10-26-10.53.05.jpg/images/uploads/8621/6544f505bb8c7_... https://www.bleriotpardubice.cz/images/uploads/8621/6544f505bb8c7_2023-10-26-10.53.05.jpg — 200 — 699.5 KiB — 675 ms — h2https://img.wedos.website/bundles/af7ae505a9eed503f8b8e6982036873e.woff2img.wedos.website/bundles/af7ae505a... https://img.wedos.website/bundles/af7ae505a9eed503f8b8e6982036873e.woff2 — 200 — 75.9 KiB — 47 ms — h3https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2fonts.gstatic.com/s/montserrat/v31/... https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2 — 200 — 34.7 KiB — 25 ms — h3https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WdhyyTh89ZNpQ.woff2fonts.gstatic.com/s/montserrat/v31/... https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WdhyyTh89ZNpQ.woff2 — 200 — 66.7 KiB — 38 ms — h3https://www.menicka.cz/api/iframe/?id=8705www.menicka.cz/api/iframe/?id=8705 https://www.menicka.cz/api/iframe/?id=8705 — 200 — 14.4 KiB — 869 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
45% of JavaScript execution is third-party
First-party Third-party 445ms · 141KB · Kč55/mo
www.gstatic.com
Other
Costly
Execution 342ms
Transfer 0 KB
Unused 48%
Monthly Cost Kč42/mo
img.wedos.website
Other
Optional
Execution 103ms
Transfer 141 KB
Monthly Cost Kč13/mo

These scripts may cost more than they're worth

  • www.gstatic.com adds 342ms and costs ~Kč42/month

45% 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

www.gstatic.com takes 342ms 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

Image Optimization
33 images, 6529 KB total, 2100 KB wasted
INFO

Image Optimization Audit

Total Images

33

Total Size

6529 KB

Oversized

15

Wasted

2100 KB

2 missing alt text 33 missing dimensions 31 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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