Skip to content
https://knihobot.cz

Performance

· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
6
REVIEW
6
PASS
12
INFO
4

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

Mobile Desktop
31
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

3.54 s

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

13.23 s

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

9.49 s

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.

7.34 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.

19.94 s

Page Load Progression

428 ms
856 ms
1.3 s
1.7 s
2.1 s
2.6 s
3.0 s
3.4 s
Checks
28
12 PASS 6 REVIEW 6 FIX
D
Page Weight Budget
Action
2.3 MB transferred, 128 requests
FIX
2.3 MB transferred, 128 requests
Info::
Page weighs 8.1 MB (2.3 MB transferred)
Warning::
JavaScript is 1.5 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.5 MB
Warning::
128 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.48 g CO2 per page load
2.3 MB / 2.4 MB budget
2.3 MB transferred
128 requests
0.48 g CO2 per page load
JavaScript 1.5 MiB 64%
Images 353.5 KiB 15%
Other 205.6 KiB 9%
Fonts 105.4 KiB 4%
CSS 104.0 KiB 4%
HTML 35.4 KiB 1%
Other 32.0 KiB 1%
Other 3.1 KiB 0%
Other 619 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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
98% third-party, 0 ms blocking
FIX
98% third-party, 0 ms blocking
Warning::
Third-party code accounts for 98% of page weight (2.2 MiB of 2.3 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-party
F
JS Execution Cost
Action
17445ms total JS execution
FIX
17445ms total JS execution
Warning::
https://c77.bookbot.com/_next/static/chunks/framew...: 6986ms CPU time
Warning::
https://knihobot.cz/: 2742ms CPU time
Warning::
Unattributable: 1410ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TF5...: 1156ms CPU time
Warning::
https://c77.bookbot.com/_next/static/chunks/5803-4...: 1120ms CPU time
Warning::
Third-party scripts: 13293ms (76% of total)

Main Thread Breakdown

Script Evaluation 45% Other 33% Style & Layout 12% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://c77.bookbot.com/_next/static/chunks/framework-c6c82aad00023883.js6986ms4038ms26ms3rd
https://knihobot.cz/2742ms15ms2ms1st
Unattributable1410ms45ms0ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-TF5RV291156ms948ms128ms3rd
https://c77.bookbot.com/_next/static/chunks/5803-44b4c941d125f4db.js1120ms31ms22ms3rd
https://c77.bookbot.com/_next/static/chunks/pages/_app-3f66b878bb9e3ed3.js844ms311ms85ms3rd
https://www.googletagmanager.com/gtag/js?id=G-N116K2C2SM&cx=c&gtm=4e6921653ms516ms95ms3rd
https://www.googletagmanager.com/gtag/destination?id=AW-894320112&cx=c&gtm=4e6921415ms332ms80ms3rd
https://c77.bookbot.com/_next/static/chunks/pages/index-c9875874d13834ca.js406ms394ms4ms3rd
https://www.googletagmanager.com/gtag/js?id=G-000&cx=c&gtm=4e6921389ms317ms68ms3rd

Showing top 10 of 20 scripts

F
JS Bundles
Action
65 scripts, 1.2 MB unused
FIX
65 scripts, 1.2 MB unused
Warning::
https://c77.bookbot.com/_next/static/chunks/5581-5...: 138 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://c77.bookbot.com/_next/static/chunks/5581-5...: 138 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 75 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-N116...: 73 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-000&...: 68 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.2 MB
1268 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://c77.bookbot.com/_next/static/chunks/5581-5141ebacfaf076b5.js0 KB138 KB (73%)✓3rd
https://c77.bookbot.com/_next/static/chunks/5581-5141ebacfaf076b5.js52 KB138 KB (73%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=AW-894320112&cx=c&gtm=4e6921158 KB75 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-N116K2C2SM&cx=c&gtm=4e6921182 KB73 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-000&cx=c&gtm=4e6921147 KB68 KB (46%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TF5RV29196 KB65 KB (33%)✓3rd
https://c77.bookbot.com/_next/static/chunks/4586-e8ea1f603aeb7f0a.js24 KB63 KB (56%)✓3rd
https://c77.bookbot.com/_next/static/chunks/4586-e8ea1f603aeb7f0a.js0 KB63 KB (56%)✓3rd
https://c77.bookbot.com/_next/static/chunks/pages/_app-3f66b878bb9e3ed3.js144 KB62 KB (43%)✓3rd
https://c77.bookbot.com/_next/static/chunks/pages/sell-books-b3e6559af12f4c3c.js0 KB57 KB (73%)✓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

F
Page Weight Inventory
Action
128 resources · 2.3 MB · 1.2 MB savings available
FIX
128 resources · 2.3 MB · 1.2 MB savings available
Warning::
Page weight 2.3 MB exceeds 1 MB target by 1.3 MB
Got: 2.3 MB Expected: ≤ 1 MB
Info::
~1.2 MB of savings available
Warning::
121 third-party resources (98% of weight)
128 resources · 2.3 MiB · 121 third-party 1.3 MiB over 1MB target
JavaScript 73% · 1.7 MiB
Image 15% · 357.9 KiB
CSS 6% · 134.9 KiB
Font 4% · 105.4 KiB
Document 1% · 35.4 KiB
Other 0% · 4.8 KiB

~1.2 MiB of savings available

Remove unused JavaScript: 1.2 MiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, max-age=0, must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
no-store—Never cache this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
B
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 353 KB
0 oversized -0 KB
8 legacy format
0 missing dimensions CLS risk
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
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
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
6 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 17.4 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
4 fonts (105 KB)
PASS
4 fonts (105 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

105 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 3.5 s LCP 13.2 shttps://c77.bookbot.com/_next/static/media/95d1875af7c44e92-s.p.woff295d1875af7c44e92-s.p.woff2 https://c77.bookbot.com/_next/static/media/95d1875af7c44e92-s.p.woff2 — 26.4 KiB — 153 ms — font-display: swaphttps://c77.bookbot.com/_next/static/media/630c17af355fa44e-s.p.woff2630c17af355fa44e-s.p.woff2 https://c77.bookbot.com/_next/static/media/630c17af355fa44e-s.p.woff2 — 42.6 KiB — 173 ms — font-display: swaphttps://c77.bookbot.com/_next/static/media/346ae887e89b3c48-s.p.woff2346ae887e89b3c48-s.p.woff2 https://c77.bookbot.com/_next/static/media/346ae887e89b3c48-s.p.woff2 — 13.2 KiB — 154 ms — font-display: swaphttps://c77.bookbot.com/_next/static/media/8a3e7529b362bc07-s.p.woff28a3e7529b362bc07-s.p.woff2 https://c77.bookbot.com/_next/static/media/8a3e7529b362bc07-s.p.woff2 — 23.2 KiB — 154 ms — font-display: swap
95d1875af7c44e92-s.p.woff2 woff2 swap
Size 26 KB
Load time 153 ms
Start 166 ms
Risk FOUT — text flashes from fallback to web font
630c17af355fa44e-s.p.woff2 woff2 swap
Size 43 KB
Load time 173 ms
Start 167 ms
Risk FOUT — text flashes from fallback to web font
346ae887e89b3c48-s.p.woff2 woff2 swap
Size 13 KB
Load time 154 ms
Start 167 ms
Risk FOUT — text flashes from fallback to web font
8a3e7529b362bc07-s.p.woff2 woff2 swap
Size 23 KB
Load time 154 ms
Start 168 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A
Resource Hints
38 hints, 0 missing preconnects
PASS
38 hints, 0 missing preconnects
Info::
12 preconnect hints -- excessive (recommended: <=6)
Each preconnect eagerly opens a TCP+TLS connection. On slow networks or low-end devices, too many parallel connections cause head-of-line blocking and starve the connections that matter for LCP. Trim to the 4-6 highest-value origins (the ones serving render-blocking or LCP resources).
Info::
1 URL(s) appear in multiple hints
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://rezised-images.knhbt.cz (preconnect+preconnect+preconnect+preconnect+preconnect+preconnect+preconnect+preconnect+preconnect).
Info::
Page uses 38 resource hint(s)

Current Resource Hints

preconnect
+2
12
preload
+4
14
dns-prefetch
3
prefetch
9

38 resource hints configured

Each preconnect eagerly opens a TCP+TLS connection. On slow networks or low-end devices, too many parallel connections cause head-of-line blocking and starve the connections that matter for LCP. Trim to the 4-6 highest-value origins (the ones serving render-blocking or LCP resources).

Why this matters

Informational: a labeled value pair from the audit.

The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://rezised-images.knhbt.cz (preconnect+preconnect+preconnect+preconnect+preconnect+preconnect+preconnect+preconnect+preconnect).

Why this matters

Performance issues directly impact user engagement and conversion rates.

A
Asset Compression
1 of 1 asset host still on gzip
PASS
1 of 1 asset host still on gzip
Info::
c77.bookbot.com serves assets with gzip; brotli would be ~20% smaller (assets: 76)
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: c77.bookbot.com (text/javascript)
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 uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: private, no-cache, no-store, max-age=0, 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::
`ETag` present -- conditional GET supported
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
16 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall
128 requests over 4371ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 3.5 s LCP 13.2 shttps://knihobot.cz// https://knihobot.cz/ — 200 — 35.4 KiB — 138 ms — h2https://strapi-c77.bookbot.com/medium_Klub_4_e5785e33bb.jpgstrapi-c77.bookbot.com/medium_Klub_... https://strapi-c77.bookbot.com/medium_Klub_4_e5785e33bb.jpg — 200 — 33.1 KiB — 91 ms — h2https://strapi-c77.bookbot.com/medium_CZ_Knihobot_millennials_HB_banner_1600x1300_view_1_34a77663e3.jpgstrapi-c77.bookbot.com/medium_CZ_Kn... https://strapi-c77.bookbot.com/medium_CZ_Knihobot_millennials_HB_banner_1600x1300_view_1_34a77663e3.jpg — 200 — 59.8 KiB — 119 ms — h2https://strapi-c77.bookbot.com/medium_CZ_Knihobot_Alza_HB_banner_1600x1300_view_1_1_710dea73fb.jpgstrapi-c77.bookbot.com/medium_CZ_Kn... https://strapi-c77.bookbot.com/medium_CZ_Knihobot_Alza_HB_banner_1600x1300_view_1_1_710dea73fb.jpg — 200 — 46.9 KiB — 118 ms — h2https://c77.bookbot.com/_next/static/media/95d1875af7c44e92-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/95d1875af7c44e92-s.p.woff2 — 200 — 26.4 KiB — 153 ms — h2https://c77.bookbot.com/_next/static/media/630c17af355fa44e-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/630c17af355fa44e-s.p.woff2 — 200 — 42.6 KiB — 173 ms — h2https://c77.bookbot.com/_next/static/media/346ae887e89b3c48-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/346ae887e89b3c48-s.p.woff2 — 200 — 13.2 KiB — 154 ms — h2https://c77.bookbot.com/_next/static/media/8a3e7529b362bc07-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/8a3e7529b362bc07-s.p.woff2 — 200 — 23.2 KiB — 154 ms — h2https://c77.bookbot.com/_next/static/css/bb22fe22a5be5034.cssc77.bookbot.com/_next/static/css/bb... https://c77.bookbot.com/_next/static/css/bb22fe22a5be5034.css — 200 — 40.4 KiB — 159 ms — h2https://c77.bookbot.com/_next/static/css/7546d9584a986825.cssc77.bookbot.com/_next/static/css/75... https://c77.bookbot.com/_next/static/css/7546d9584a986825.css — 200 — 9.5 KiB — 98 ms — h2https://c77.bookbot.com/_next/static/css/57a1ce0d207a9847.cssc77.bookbot.com/_next/static/css/57... https://c77.bookbot.com/_next/static/css/57a1ce0d207a9847.css — 200 — 6.9 KiB — 116 ms — h2https://c77.bookbot.com/_next/static/css/bf4b558c1bd6b5b8.cssc77.bookbot.com/_next/static/css/bf... https://c77.bookbot.com/_next/static/css/bf4b558c1bd6b5b8.css — 200 — 2.5 KiB — 123 ms — h2https://c77.bookbot.com/_next/static/css/47143a7ead0d091f.cssc77.bookbot.com/_next/static/css/47... https://c77.bookbot.com/_next/static/css/47143a7ead0d091f.css — 200 — 6.4 KiB — 136 ms — h2https://c77.bookbot.com/_next/static/css/51c6b0b5ed325015.cssc77.bookbot.com/_next/static/css/51... https://c77.bookbot.com/_next/static/css/51c6b0b5ed325015.css — 200 — 2.4 KiB — 124 ms — h2https://c77.bookbot.com/_next/static/css/e442df73cda792e1.cssc77.bookbot.com/_next/static/css/e4... https://c77.bookbot.com/_next/static/css/e442df73cda792e1.css — 200 — 7.7 KiB — 136 ms — h2https://c77.bookbot.com/_next/static/css/9e9b9970f6de2bd0.cssc77.bookbot.com/_next/static/css/9e... https://c77.bookbot.com/_next/static/css/9e9b9970f6de2bd0.css — 200 — 5.3 KiB — 135 ms — h2https://c77.bookbot.com/_next/static/css/a3faf7aae695dcd9.cssc77.bookbot.com/_next/static/css/a3... https://c77.bookbot.com/_next/static/css/a3faf7aae695dcd9.css — 200 — 9.0 KiB — 134 ms — h2https://knihobot.cz/icons.889d67ac8189.svg/icons.889d67ac8189.svg https://knihobot.cz/icons.889d67ac8189.svg — 200 — 13.1 KiB — 160 ms — h2https://cms.knihobot.cz/wp-content/uploads/2026/02/CZ_watch-dog-banner-web.webpcms.knihobot.cz/wp-content/uploads/... https://cms.knihobot.cz/wp-content/uploads/2026/02/CZ_watch-dog-banner-web.webp — 200 — 41.3 KiB — 242 ms — h2https://knihobot.cz/icons.889d67ac8189.svg/icons.889d67ac8189.svg https://knihobot.cz/icons.889d67ac8189.svg — 200 — 0 B — 177 ms — h2https://knihobot.cz/favicons/site.webmanifest/favicons/site.webmanifest https://knihobot.cz/favicons/site.webmanifest — 200 — 619 B — 143 ms — h2https://c77.bookbot.com/logos/knihobot/green/logo-cs.svgc77.bookbot.com/logos/knihobot/gree... https://c77.bookbot.com/logos/knihobot/green/logo-cs.svg — 200 — 2.5 KiB — 72 ms — h2https://c77.bookbot.com/logos/bookbots-green.svgc77.bookbot.com/logos/bookbots-gree... https://c77.bookbot.com/logos/bookbots-green.svg — 200 — 5.9 KiB — 73 ms — h2https://c77.bookbot.com/_next/static/media/blob-2.4eac3eed.pngc77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/blob-2.4eac3eed.png — 200 — 18.4 KiB — 82 ms — h2https://c77.bookbot.com/i18n/cs.1b36f6eada48.jsc77.bookbot.com/i18n/cs.1b36f6eada4... https://c77.bookbot.com/i18n/cs.1b36f6eada48.js — 200 — 75.1 KiB — 168 ms — h2https://c77.bookbot.com/_next/static/chunks/webpack-2c5fe566025f443b.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/webpack-2c5fe566025f443b.js — 200 — 8.2 KiB — 90 ms — h2https://c77.bookbot.com/_next/static/chunks/framework-c6c82aad00023883.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/framework-c6c82aad00023883.js — 200 — 44.7 KiB — 112 ms — h2https://c77.bookbot.com/_next/static/chunks/main-9b896f863166457a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/main-9b896f863166457a.js — 200 — 37.8 KiB — 152 ms — h2https://c77.bookbot.com/_next/static/chunks/sentry-a0e22e7025d8711c.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/sentry-a0e22e7025d8711c.js — 200 — 17.3 KiB — 99 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/_app-3f66b878bb9e3ed3.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/_app-3f66b878bb9e3ed3.js — 200 — 144.4 KiB — 201 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 3.5 s LCP 13.2 shttps://knihobot.cz// https://knihobot.cz/ — 200 — 35.4 KiB — 138 ms — h2https://strapi-c77.bookbot.com/medium_Klub_4_e5785e33bb.jpgstrapi-c77.bookbot.com/medium_Klub_... https://strapi-c77.bookbot.com/medium_Klub_4_e5785e33bb.jpg — 200 — 33.1 KiB — 91 ms — h2https://strapi-c77.bookbot.com/medium_CZ_Knihobot_millennials_HB_banner_1600x1300_view_1_34a77663e3.jpgstrapi-c77.bookbot.com/medium_CZ_Kn... https://strapi-c77.bookbot.com/medium_CZ_Knihobot_millennials_HB_banner_1600x1300_view_1_34a77663e3.jpg — 200 — 59.8 KiB — 119 ms — h2https://strapi-c77.bookbot.com/medium_CZ_Knihobot_Alza_HB_banner_1600x1300_view_1_1_710dea73fb.jpgstrapi-c77.bookbot.com/medium_CZ_Kn... https://strapi-c77.bookbot.com/medium_CZ_Knihobot_Alza_HB_banner_1600x1300_view_1_1_710dea73fb.jpg — 200 — 46.9 KiB — 118 ms — h2https://c77.bookbot.com/_next/static/media/95d1875af7c44e92-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/95d1875af7c44e92-s.p.woff2 — 200 — 26.4 KiB — 153 ms — h2https://c77.bookbot.com/_next/static/media/630c17af355fa44e-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/630c17af355fa44e-s.p.woff2 — 200 — 42.6 KiB — 173 ms — h2https://c77.bookbot.com/_next/static/media/346ae887e89b3c48-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/346ae887e89b3c48-s.p.woff2 — 200 — 13.2 KiB — 154 ms — h2https://c77.bookbot.com/_next/static/media/8a3e7529b362bc07-s.p.woff2c77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/8a3e7529b362bc07-s.p.woff2 — 200 — 23.2 KiB — 154 ms — h2https://c77.bookbot.com/_next/static/css/bb22fe22a5be5034.cssc77.bookbot.com/_next/static/css/bb... https://c77.bookbot.com/_next/static/css/bb22fe22a5be5034.css — 200 — 40.4 KiB — 159 ms — h2https://c77.bookbot.com/_next/static/css/7546d9584a986825.cssc77.bookbot.com/_next/static/css/75... https://c77.bookbot.com/_next/static/css/7546d9584a986825.css — 200 — 9.5 KiB — 98 ms — h2https://c77.bookbot.com/_next/static/css/57a1ce0d207a9847.cssc77.bookbot.com/_next/static/css/57... https://c77.bookbot.com/_next/static/css/57a1ce0d207a9847.css — 200 — 6.9 KiB — 116 ms — h2https://c77.bookbot.com/_next/static/css/bf4b558c1bd6b5b8.cssc77.bookbot.com/_next/static/css/bf... https://c77.bookbot.com/_next/static/css/bf4b558c1bd6b5b8.css — 200 — 2.5 KiB — 123 ms — h2https://c77.bookbot.com/_next/static/css/47143a7ead0d091f.cssc77.bookbot.com/_next/static/css/47... https://c77.bookbot.com/_next/static/css/47143a7ead0d091f.css — 200 — 6.4 KiB — 136 ms — h2https://c77.bookbot.com/_next/static/css/51c6b0b5ed325015.cssc77.bookbot.com/_next/static/css/51... https://c77.bookbot.com/_next/static/css/51c6b0b5ed325015.css — 200 — 2.4 KiB — 124 ms — h2https://c77.bookbot.com/_next/static/css/e442df73cda792e1.cssc77.bookbot.com/_next/static/css/e4... https://c77.bookbot.com/_next/static/css/e442df73cda792e1.css — 200 — 7.7 KiB — 136 ms — h2https://c77.bookbot.com/_next/static/css/9e9b9970f6de2bd0.cssc77.bookbot.com/_next/static/css/9e... https://c77.bookbot.com/_next/static/css/9e9b9970f6de2bd0.css — 200 — 5.3 KiB — 135 ms — h2https://c77.bookbot.com/_next/static/css/a3faf7aae695dcd9.cssc77.bookbot.com/_next/static/css/a3... https://c77.bookbot.com/_next/static/css/a3faf7aae695dcd9.css — 200 — 9.0 KiB — 134 ms — h2https://knihobot.cz/icons.889d67ac8189.svg/icons.889d67ac8189.svg https://knihobot.cz/icons.889d67ac8189.svg — 200 — 13.1 KiB — 160 ms — h2https://cms.knihobot.cz/wp-content/uploads/2026/02/CZ_watch-dog-banner-web.webpcms.knihobot.cz/wp-content/uploads/... https://cms.knihobot.cz/wp-content/uploads/2026/02/CZ_watch-dog-banner-web.webp — 200 — 41.3 KiB — 242 ms — h2https://knihobot.cz/icons.889d67ac8189.svg/icons.889d67ac8189.svg https://knihobot.cz/icons.889d67ac8189.svg — 200 — 0 B — 177 ms — h2https://knihobot.cz/favicons/site.webmanifest/favicons/site.webmanifest https://knihobot.cz/favicons/site.webmanifest — 200 — 619 B — 143 ms — h2https://c77.bookbot.com/logos/knihobot/green/logo-cs.svgc77.bookbot.com/logos/knihobot/gree... https://c77.bookbot.com/logos/knihobot/green/logo-cs.svg — 200 — 2.5 KiB — 72 ms — h2https://c77.bookbot.com/logos/bookbots-green.svgc77.bookbot.com/logos/bookbots-gree... https://c77.bookbot.com/logos/bookbots-green.svg — 200 — 5.9 KiB — 73 ms — h2https://c77.bookbot.com/_next/static/media/blob-2.4eac3eed.pngc77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/blob-2.4eac3eed.png — 200 — 18.4 KiB — 82 ms — h2https://c77.bookbot.com/i18n/cs.1b36f6eada48.jsc77.bookbot.com/i18n/cs.1b36f6eada4... https://c77.bookbot.com/i18n/cs.1b36f6eada48.js — 200 — 75.1 KiB — 168 ms — h2https://c77.bookbot.com/_next/static/chunks/webpack-2c5fe566025f443b.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/webpack-2c5fe566025f443b.js — 200 — 8.2 KiB — 90 ms — h2https://c77.bookbot.com/_next/static/chunks/framework-c6c82aad00023883.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/framework-c6c82aad00023883.js — 200 — 44.7 KiB — 112 ms — h2https://c77.bookbot.com/_next/static/chunks/main-9b896f863166457a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/main-9b896f863166457a.js — 200 — 37.8 KiB — 152 ms — h2https://c77.bookbot.com/_next/static/chunks/sentry-a0e22e7025d8711c.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/sentry-a0e22e7025d8711c.js — 200 — 17.3 KiB — 99 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/_app-3f66b878bb9e3ed3.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/_app-3f66b878bb9e3ed3.js — 200 — 144.4 KiB — 201 ms — h2https://c77.bookbot.com/_next/static/chunks/7870-0e246a8f1f3005b1.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/7870-0e246a8f1f3005b1.js — 200 — 14.2 KiB — 161 ms — h2https://c77.bookbot.com/_next/static/chunks/6720-48418f5113443fe5.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/6720-48418f5113443fe5.js — 200 — 4.5 KiB — 158 ms — h2https://c77.bookbot.com/_next/static/chunks/9799-35b629520a98b2cd.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/9799-35b629520a98b2cd.js — 200 — 19.7 KiB — 159 ms — h2https://c77.bookbot.com/_next/static/chunks/5870-9e097eff542a4ada.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5870-9e097eff542a4ada.js — 200 — 30.1 KiB — 165 ms — h2https://c77.bookbot.com/_next/static/chunks/5843-0d3d3a3335984bc9.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5843-0d3d3a3335984bc9.js — 200 — 35.4 KiB — 182 ms — h2https://c77.bookbot.com/_next/static/chunks/4983-bd0e9cca375a720d.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/4983-bd0e9cca375a720d.js — 200 — 8.4 KiB — 167 ms — h2https://c77.bookbot.com/_next/static/chunks/3516-54d74991d11803b6.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/3516-54d74991d11803b6.js — 200 — 5.1 KiB — 168 ms — h2https://c77.bookbot.com/_next/static/chunks/5803-44b4c941d125f4db.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5803-44b4c941d125f4db.js — 200 — 40.3 KiB — 188 ms — h2https://c77.bookbot.com/_next/static/chunks/7427-32e16f7ed51dc16d.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/7427-32e16f7ed51dc16d.js — 200 — 4.8 KiB — 174 ms — h2https://c77.bookbot.com/_next/static/chunks/8329-7419ec346b14299c.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/8329-7419ec346b14299c.js — 200 — 16.1 KiB — 182 ms — h2https://c77.bookbot.com/_next/static/chunks/586-ad68e541dbaa84c4.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/586-ad68e541dbaa84c4.js — 200 — 6.8 KiB — 178 ms — h2https://c77.bookbot.com/_next/static/chunks/3544-8253222f03ea3cac.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/3544-8253222f03ea3cac.js — 200 — 11.6 KiB — 179 ms — h2https://c77.bookbot.com/_next/static/chunks/155-87788944e47d4ea3.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/155-87788944e47d4ea3.js — 200 — 35.2 KiB — 196 ms — h2https://c77.bookbot.com/_next/static/chunks/3622-f28260edcce19884.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/3622-f28260edcce19884.js — 200 — 11.6 KiB — 185 ms — h2https://c77.bookbot.com/_next/static/chunks/5191-50be335be045dbc6.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5191-50be335be045dbc6.js — 200 — 10.3 KiB — 188 ms — h2https://c77.bookbot.com/_next/static/chunks/2761-ff17abfb2a57c664.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/2761-ff17abfb2a57c664.js — 200 — 3.7 KiB — 189 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/index-c9875874d13834ca.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/index-c9875874d13834ca.js — 200 — 8.4 KiB — 189 ms — h2https://c77.bookbot.com/_next/static/4038daf32eb89a2c9e4372ca490d7ccd87b21257/_buildManifest.jsc77.bookbot.com/_next/static/4038da... https://c77.bookbot.com/_next/static/4038daf32eb89a2c9e4372ca490d7ccd87b21257/_buildManifest.js — 200 — 9.1 KiB — 194 ms — h2https://c77.bookbot.com/_next/static/4038daf32eb89a2c9e4372ca490d7ccd87b21257/_ssgManifest.jsc77.bookbot.com/_next/static/4038da... https://c77.bookbot.com/_next/static/4038daf32eb89a2c9e4372ca490d7ccd87b21257/_ssgManifest.js — 200 — 552 B — 190 ms — h2https://c77.bookbot.com/_next/static/media/blob-1.8e4a8eaf.pngc77.bookbot.com/_next/static/media/... https://c77.bookbot.com/_next/static/media/blob-1.8e4a8eaf.png — 200 — 13.6 KiB — 190 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TF5RV29www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TF5RV29 — 200 — 196.4 KiB — 373 ms — h2https://c77.bookbot.com/_next/static/chunks/3960.305ffffcd11d311a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/3960.305ffffcd11d311a.js — 200 — 699 B — 6 ms — h2https://c77.bookbot.com/_next/static/chunks/3482.4388d82c6fd97d7f.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/3482.4388d82c6fd97d7f.js — 200 — 689 B — 11 ms — h2https://c77.bookbot.com/_next/static/css/8816c932fa2c94a2.cssc77.bookbot.com/_next/static/css/88... https://c77.bookbot.com/_next/static/css/8816c932fa2c94a2.css — 200 — 609 B — 44 ms — h2https://c77.bookbot.com/_next/static/css/b0ba5062db3e4113.cssc77.bookbot.com/_next/static/css/b0... https://c77.bookbot.com/_next/static/css/b0ba5062db3e4113.css — 200 — 641 B — 38 ms — h2https://c77.bookbot.com/_next/static/css/e19d78242baf6461.cssc77.bookbot.com/_next/static/css/e1... https://c77.bookbot.com/_next/static/css/e19d78242baf6461.css — 200 — 1.5 KiB — 38 ms — h2https://c77.bookbot.com/_next/static/css/8a2638d572424c2f.cssc77.bookbot.com/_next/static/css/8a... https://c77.bookbot.com/_next/static/css/8a2638d572424c2f.css — 200 — 4.4 KiB — 37 ms — h2https://c77.bookbot.com/_next/static/css/7cb94aa49b0f09da.cssc77.bookbot.com/_next/static/css/7c... https://c77.bookbot.com/_next/static/css/7cb94aa49b0f09da.css — 200 — 4.3 KiB — 33 ms — h2https://c77.bookbot.com/_next/static/css/eb4155d23fcc1078.cssc77.bookbot.com/_next/static/css/eb... https://c77.bookbot.com/_next/static/css/eb4155d23fcc1078.css — 200 — 1.2 KiB — 33 ms — h2https://c77.bookbot.com/_next/static/chunks/5928.2d52e9e2618aba69.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5928.2d52e9e2618aba69.js — 200 — 5.9 KiB — 38 ms — h2https://c77.bookbot.com/_next/static/css/d1f7d8cd2b8c708d.cssc77.bookbot.com/_next/static/css/d1... https://c77.bookbot.com/_next/static/css/d1f7d8cd2b8c708d.css — 200 — 1.3 KiB — 32 ms — h2https://c77.bookbot.com/_next/static/chunks/22f692b0-ffc205d9e6e401f3.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/22f692b0-ffc205d9e6e401f3.js — 200 — 34.9 KiB — 41 ms — h2https://c77.bookbot.com/_next/static/chunks/6157.6050915882fa2f3e.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/6157.6050915882fa2f3e.js — 200 — 15.1 KiB — 49 ms — h2https://knihobot.cz/adonis/v1/cms/blocks/701/adonis/v1/cms/blocks/701 https://knihobot.cz/adonis/v1/cms/blocks/701 — 200 — 3.1 KiB — 25 ms — h2https://knihobot.cz/favicons/favicon.ico/favicons/favicon.ico https://knihobot.cz/favicons/favicon.ico — 200 — 4.4 KiB — 17 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/login-dd972ecbaa155a03.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/login-dd972ecbaa155a03.js — 200 — 3.4 KiB — 8 ms — h2https://c77.bookbot.com/_next/static/chunks/2539-10989c06f7607709.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/2539-10989c06f7607709.js — 200 — 8.6 KiB — 11 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/cart-c9bc3cbadca9fd53.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/cart-c9bc3cbadca9fd53.js — 200 — 18.5 KiB — 14 ms — h2https://c77.bookbot.com/_next/static/chunks/f69bbb46-db551f39eee35ab4.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/f69bbb46-db551f39eee35ab4.js — 200 — 25.1 KiB — 24 ms — h2https://c77.bookbot.com/_next/static/chunks/4586-e8ea1f603aeb7f0a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/4586-e8ea1f603aeb7f0a.js — 200 — 23.5 KiB — 27 ms — h2https://c77.bookbot.com/_next/static/chunks/7658-ad11b1418a62070c.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/7658-ad11b1418a62070c.js — 200 — 9.2 KiB — 26 ms — h2https://c77.bookbot.com/_next/static/chunks/5896-5fce3591cb6450d6.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5896-5fce3591cb6450d6.js — 200 — 4.4 KiB — 14 ms — h2https://c77.bookbot.com/_next/static/chunks/1618-42a82ab56d2363c2.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/1618-42a82ab56d2363c2.js — 200 — 4.0 KiB — 16 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/sell-books-b3e6559af12f4c3c.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/sell-books-b3e6559af12f4c3c.js — 200 — 23.3 KiB — 19 ms — h2https://rezised-images.knhbt.cz/440x440/91082799.webprezised-images.knhbt.cz/440x440/910... https://rezised-images.knhbt.cz/440x440/91082799.webp — 200 — 10.6 KiB — 54 ms — h2https://rezised-images.knhbt.cz/440x440/91115223.webprezised-images.knhbt.cz/440x440/911... https://rezised-images.knhbt.cz/440x440/91115223.webp — 200 — 14.7 KiB — 63 ms — h2https://rezised-images.knhbt.cz/440x440/88363942.webprezised-images.knhbt.cz/440x440/883... https://rezised-images.knhbt.cz/440x440/88363942.webp — 200 — 14.1 KiB — 44 ms — h2https://rezised-images.knhbt.cz/440x440/90028156.webprezised-images.knhbt.cz/440x440/900... https://rezised-images.knhbt.cz/440x440/90028156.webp — 200 — 13.4 KiB — 47 ms — h2https://rezised-images.knhbt.cz/440x440/91407914.webprezised-images.knhbt.cz/440x440/914... https://rezised-images.knhbt.cz/440x440/91407914.webp — 200 — 12.9 KiB — 49 ms — h2https://rezised-images.knhbt.cz/440x440/87461439.webprezised-images.knhbt.cz/440x440/874... https://rezised-images.knhbt.cz/440x440/87461439.webp — 200 — 19.3 KiB — 63 ms — h2https://rezised-images.knhbt.cz/440x440/91304417.webprezised-images.knhbt.cz/440x440/913... https://rezised-images.knhbt.cz/440x440/91304417.webp — 200 — 16.6 KiB — 62 ms — h2https://rezised-images.knhbt.cz/440x440/90717219.webprezised-images.knhbt.cz/440x440/907... https://rezised-images.knhbt.cz/440x440/90717219.webp — 200 — 17.3 KiB — 63 ms — h2https://www.googletagmanager.com/gtag/js?id=G-N116K2C2SM&cx=c&gtm=4e6921www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-N116K2C2SM&cx=c&gtm=4e6921 — 200 — 182.1 KiB — 81 ms — h2https://www.googletagmanager.com/gtag/js?id=G-000&cx=c&gtm=4e6921www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-000&cx=c&gtm=4e6921 — 200 — 146.8 KiB — 80 ms — h3https://mhubc.knihobot.cz/api/mhubc.jsmhubc.knihobot.cz/api/mhubc.js https://mhubc.knihobot.cz/api/mhubc.js — 200 — 4.4 KiB — 84 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=6&frm=0&apvc=1&ae=g&en=page_view&dl=https%3A%2F%2Fknihobot.cz%2F&scrsrc=www.googletagmanager.com&rnd=1927617668.1788867735&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He6921v835634245za200zd835634245xea&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=115938465~115938468~118897920~118897930~120385423~120469145~120469153&tft=1788867734922&tfd=2429&fmt=8pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=6&frm=0&apvc=1&ae=g&en=page_view&dl=https%3A%2F%2Fknihobot.cz%2F&scrsrc=www.googletagmanager.com&rnd=1927617668.1788867735&navt=n&npa=1&ep.ads_data_redaction=0&gtm=45He6921v835634245za200zd835634245xea&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=115938465~115938468~118897920~118897930~120385423~120469145~120469153&tft=1788867734922&tfd=2429&fmt=8 — 200 — 21 B — 949 ms — h3https://l.seznam.cz/sul.js?id=hga0pgy1bxumavnfoh0d5arql.seznam.cz/sul.js?id=hga0pgy1bxuma... https://l.seznam.cz/sul.js?id=hga0pgy1bxumavnfoh0d5arq — 200 — 103.4 KiB — 186 ms — h2https://c77.bookbot.com/_next/static/chunks/6669-b35c29db4640ae70.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/6669-b35c29db4640ae70.js — 200 — 4.6 KiB — 9 ms — h2https://c77.bookbot.com/_next/static/chunks/2826-0a42107f64573e3a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/2826-0a42107f64573e3a.js — 200 — 4.9 KiB — 13 ms — h2https://c77.bookbot.com/_next/static/chunks/2606-73fb6db06fc090ae.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/2606-73fb6db06fc090ae.js — 200 — 19.1 KiB — 20 ms — h2https://c77.bookbot.com/_next/static/chunks/5581-5141ebacfaf076b5.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5581-5141ebacfaf076b5.js — 200 — 51.8 KiB — 26 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/g/%5Bid%5D/b/%5BbookId%5D-7ca583e2616a9d0a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/g/%5Bid%5D/b/%5BbookId%5D-7ca583e2616a9d0a.js — 200 — 822 B — 24 ms — h2https://mhubc.knihobot.cz/api/semhubc.knihobot.cz/api/se https://mhubc.knihobot.cz/api/se — 200 — 107 B — 71 ms — h2https://mhubc.knihobot.cz/api/semhubc.knihobot.cz/api/se https://mhubc.knihobot.cz/api/se — 200 — 19 B — 69 ms — h2https://l.seznam.cz/static/js/sem.js?szn_loader=1l.seznam.cz/static/js/sem.js?szn_lo... https://l.seznam.cz/static/js/sem.js?szn_loader=1 — 200 — 68.8 KiB — 90 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-N116K2C2SM&gtm=45je6921v886665513z8835634245za20gzb835634245zd835634245&_p=1788867733790&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&_eu=AAAAAGAC&are=1&cid=1052620496.1788867736&frm=0&pscdl=denied&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=115938465~115938468~118897920~118897930~120213116~120385423~120469145~120469153&dr=&sid=1788867736&sct=1&seg=0&dl=https%3A%2F%2Fknihobot.cz%2F&dt=Knihobot%20antikvari%C3%A1t%20online%20%7C%20vrac%C3%ADme%20knihy%20do%20ob%C4%9Bhu%20-%20knihobot.cz&_tu=gA&en=page_view&_fv=1&_nsi=1&_ss=1&ep.gtm_event=gtm.js%20%7C%20GA4%20-%20konfigurace&ep.user_identification=anonymous&ep.content_group=Homepage&epn.fe_timestamp=1788867734851&up.user_identification=anonymous&upn.ab_bucket=114&tfd=3683region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-N116K2C2SM&gtm=45je6921v886665513z8835634245za20gzb835634245zd835634245&_p=1788867733790&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&_eu=AAAAAGAC&are=1&cid=1052620496.1788867736&frm=0&pscdl=denied&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=115938465~115938468~118897920~118897930~120213116~120385423~120469145~120469153&dr=&sid=1788867736&sct=1&seg=0&dl=https%3A%2F%2Fknihobot.cz%2F&dt=Knihobot%20antikvari%C3%A1t%20online%20%7C%20vrac%C3%ADme%20knihy%20do%20ob%C4%9Bhu%20-%20knihobot.cz&_tu=gA&en=page_view&_fv=1&_nsi=1&_ss=1&ep.gtm_event=gtm.js%20%7C%20GA4%20-%20konfigurace&ep.user_identification=anonymous&ep.content_group=Homepage&epn.fe_timestamp=1788867734851&up.user_identification=anonymous&upn.ab_bucket=114&tfd=3683 — 204 — 546 B — 112 ms — h2https://www.googletagmanager.com/gtag/destination?id=AW-894320112&cx=c&gtm=4e6921www.googletagmanager.com/gtag/desti... https://www.googletagmanager.com/gtag/destination?id=AW-894320112&cx=c&gtm=4e6921 — 200 — 158.5 KiB — 59 ms — h3https://knihobot.cz/adonis/v1/analytics/gtm/g/collect?v=2&tid=G-000&gtm=45je6921z8835634245za20gzb835634245zd835634245&_p=1788867733790&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&ecid=1704029034&_fplc=0&are=1&cid=1052620496.1788867736&frm=0&pscdl=denied&rcb=7&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&ur=NL-NH&sst.rnd=1927617668.1788867735&sst.gch=1&sst.etld=google.nl&sst.gcsub=region1&sst.tft=1788867733790&sst.lpc=188721650&sst.navt=n&sst.ude=0&_s=1&tag_exp=115938465~115938469~118897920~118897930~120385423~120469145~120469153&dr=&sid=1788867736&sct=1&seg=0&dl=https%3A%2F%2Fknihobot.cz%2F&dt=Knihobot%20antikvari%C3%A1t%20online%20%7C%20vrac%C3%ADme%20knihy%20do%20ob%C4%9Bhu%20-%20knihobot.cz&_tu=hA&en=page_view&_fv=1&_ss=1&gap.sstd=1&ep.gtm_event=gtm.js%20%7C%20GA4%20-%20konfigurace&ep.user_identification=anonymous&ep.content_group=Homepage&epn.fe_timestamp=1788867734863&up.user_identification=anonymous&upn.ab_bucket=114&tfd=3887&richsstsse/adonis/v1/analytics/gtm/g/collect?... https://knihobot.cz/adonis/v1/analytics/gtm/g/collect?v=2&tid=G-000&gtm=45je6921z8835634245za20gzb835634245zd835634245&_p=1788867733790&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&ecid=1704029034&_fplc=0&are=1&cid=1052620496.1788867736&frm=0&pscdl=denied&rcb=7&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&ur=NL-NH&sst.rnd=1927617668.1788867735&sst.gch=1&sst.etld=google.nl&sst.gcsub=region1&sst.tft=1788867733790&sst.lpc=188721650&sst.navt=n&sst.ude=0&_s=1&tag_exp=115938465~115938469~118897920~118897930~120385423~120469145~120469153&dr=&sid=1788867736&sct=1&seg=0&dl=https%3A%2F%2Fknihobot.cz%2F&dt=Knihobot%20antikvari%C3%A1t%20online%20%7C%20vrac%C3%ADme%20knihy%20do%20ob%C4%9Bhu%20-%20knihobot.cz&_tu=hA&en=page_view&_fv=1&_ss=1&gap.sstd=1&ep.gtm_event=gtm.js%20%7C%20GA4%20-%20konfigurace&ep.user_identification=anonymous&ep.content_group=Homepage&epn.fe_timestamp=1788867734863&up.user_identification=anonymous&upn.ab_bucket=114&tfd=3887&richsstsse — 204 — 236 B — 17 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=8&frm=0&apvc=0&ae=g&tid=AW-894320112&en=gtm.dom&dl=https%3A%2F%2Fknihobot.cz%2F&scrsrc=www.googletagmanager.com&rnd=1927617668.1788867735&navt=n&npa=1&ep.ecomm_prodid=&ep.ecomm_pagetype=home&ep.ecomm_totalvalue=0&_tu=CA&gtm=45be6921v9103728426z8835634245za20gzb835634245zd835634245xea&gcs=G100&gcd=13p3p3V2p5l1&dma_cps=-&dma=1&tag_exp=115938465~115938468~118897920~118897930~120213116~120385422~120469145~120469153~120474863~120914213&tft=1788867736593&tfd=4100&tids=AW-894320112&fmt=8pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=8&frm=0&apvc=0&ae=g&tid=AW-894320112&en=gtm.dom&dl=https%3A%2F%2Fknihobot.cz%2F&scrsrc=www.googletagmanager.com&rnd=1927617668.1788867735&navt=n&npa=1&ep.ecomm_prodid=&ep.ecomm_pagetype=home&ep.ecomm_totalvalue=0&_tu=CA&gtm=45be6921v9103728426z8835634245za20gzb835634245zd835634245xea&gcs=G100&gcd=13p3p3V2p5l1&dma_cps=-&dma=1&tag_exp=115938465~115938468~118897920~118897930~120213116~120385422~120469145~120469153~120474863~120914213&tft=1788867736593&tfd=4100&tids=AW-894320112&fmt=8 — 200 — 21 B — 46 ms — h3https://c77.bookbot.com/_next/static/css/7546d9584a986825.cssc77.bookbot.com/_next/static/css/75... https://c77.bookbot.com/_next/static/css/7546d9584a986825.css — 200 — 0 B — 30 ms — h2https://c77.bookbot.com/_next/static/css/57a1ce0d207a9847.cssc77.bookbot.com/_next/static/css/57... https://c77.bookbot.com/_next/static/css/57a1ce0d207a9847.css — 200 — 0 B — 29 ms — h2https://c77.bookbot.com/_next/static/css/bf4b558c1bd6b5b8.cssc77.bookbot.com/_next/static/css/bf... https://c77.bookbot.com/_next/static/css/bf4b558c1bd6b5b8.css — 200 — 0 B — 41 ms — h2https://c77.bookbot.com/_next/static/css/47143a7ead0d091f.cssc77.bookbot.com/_next/static/css/47... https://c77.bookbot.com/_next/static/css/47143a7ead0d091f.css — 200 — 0 B — 49 ms — h2https://c77.bookbot.com/_next/static/css/51c6b0b5ed325015.cssc77.bookbot.com/_next/static/css/51... https://c77.bookbot.com/_next/static/css/51c6b0b5ed325015.css — 200 — 0 B — 41 ms — h2https://c77.bookbot.com/_next/static/css/e442df73cda792e1.cssc77.bookbot.com/_next/static/css/e4... https://c77.bookbot.com/_next/static/css/e442df73cda792e1.css — 200 — 0 B — 44 ms — h2https://c77.bookbot.com/_next/static/css/9e9b9970f6de2bd0.cssc77.bookbot.com/_next/static/css/9e... https://c77.bookbot.com/_next/static/css/9e9b9970f6de2bd0.css — 200 — 0 B — 44 ms — h2https://c77.bookbot.com/_next/static/css/a3faf7aae695dcd9.cssc77.bookbot.com/_next/static/css/a3... https://c77.bookbot.com/_next/static/css/a3faf7aae695dcd9.css — 200 — 0 B — 41 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/login-dd972ecbaa155a03.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/login-dd972ecbaa155a03.js — 200 — 0 B — 39 ms — h2https://c77.bookbot.com/_next/static/css/bd26dbb6ddb1b7ab.cssc77.bookbot.com/_next/static/css/bd... https://c77.bookbot.com/_next/static/css/bd26dbb6ddb1b7ab.css — 200 — 933 B — 17 ms — h2https://c77.bookbot.com/_next/static/chunks/2539-10989c06f7607709.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/2539-10989c06f7607709.js — 200 — 0 B — 38 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/cart-c9bc3cbadca9fd53.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/cart-c9bc3cbadca9fd53.js — 200 — 0 B — 40 ms — h2https://c77.bookbot.com/_next/static/css/7fbda362f9932fa0.cssc77.bookbot.com/_next/static/css/7f... https://c77.bookbot.com/_next/static/css/7fbda362f9932fa0.css — 200 — 3.6 KiB — 15 ms — h2https://c77.bookbot.com/_next/static/css/37536c62bea6242b.cssc77.bookbot.com/_next/static/css/37... https://c77.bookbot.com/_next/static/css/37536c62bea6242b.css — 200 — 5.6 KiB — 15 ms — h2https://mhubc.knihobot.cz/api/proxy/g/collect?v=2&tid=G-N116K2C2SM&gtm=45je6921v886665513z8835634245za20gzb835634245zd835634245&_p=1788867733790&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&ecid=316678130&_eu=AAAAAGA&_fplc=0&are=1&cid=1052620496.1788867736&frm=0&pscdl=denied&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&ur=NL-NH&sst.rnd=1927617668.1788867735&sst.gch=1&sst.etld=google.nl&sst.gcsub=region1&sst.tft=1788867733790&sst.lpc=188721650&sst.navt=n&sst.ude=0&gaf=2&_s=2&tag_exp=115938465~115938468~118897920~118897930~120213116~120385423~120469145~120469153&dr=&sid=1788867736&sct=1&seg=0&dl=https%3A%2F%2Fknihobot.cz%2F&dt=Knihobot%20antikvari%C3%A1t%20online%20%7C%20vrac%C3%ADme%20knihy%20do%20ob%C4%9Bhu%20-%20knihobot.cz&_tu=hA&en=ux_page_view&gap.sstd=2&ep.gtm_event=gtm.js%20%7C%20GA4%20-%20konfigurace&ep.user_identification=anonymous&ep.content_group=Homepage&epn.fe_timestamp=1788867734871&ep.unique_event_id=627675777-3.1788867734870&_et=10&tfd=4208&richsstssemhubc.knihobot.cz/api/proxy/g/colle... https://mhubc.knihobot.cz/api/proxy/g/collect?v=2&tid=G-N116K2C2SM&gtm=45je6921v886665513z8835634245za20gzb835634245zd835634245&_p=1788867733790&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&ecid=316678130&_eu=AAAAAGA&_fplc=0&are=1&cid=1052620496.1788867736&frm=0&pscdl=denied&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&ur=NL-NH&sst.rnd=1927617668.1788867735&sst.gch=1&sst.etld=google.nl&sst.gcsub=region1&sst.tft=1788867733790&sst.lpc=188721650&sst.navt=n&sst.ude=0&gaf=2&_s=2&tag_exp=115938465~115938468~118897920~118897930~120213116~120385423~120469145~120469153&dr=&sid=1788867736&sct=1&seg=0&dl=https%3A%2F%2Fknihobot.cz%2F&dt=Knihobot%20antikvari%C3%A1t%20online%20%7C%20vrac%C3%ADme%20knihy%20do%20ob%C4%9Bhu%20-%20knihobot.cz&_tu=hA&en=ux_page_view&gap.sstd=2&ep.gtm_event=gtm.js%20%7C%20GA4%20-%20konfigurace&ep.user_identification=anonymous&ep.content_group=Homepage&epn.fe_timestamp=1788867734871&ep.unique_event_id=627675777-3.1788867734870&_et=10&tfd=4208&richsstsse — 202 — 152 B — 160 ms — h2https://c77.bookbot.com/_next/static/chunks/f69bbb46-db551f39eee35ab4.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/f69bbb46-db551f39eee35ab4.js — 200 — 0 B — 9 ms — h2https://c77.bookbot.com/_next/static/chunks/4586-e8ea1f603aeb7f0a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/4586-e8ea1f603aeb7f0a.js — 200 — 0 B — 30 ms — h2https://c77.bookbot.com/_next/static/chunks/7658-ad11b1418a62070c.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/7658-ad11b1418a62070c.js — 200 — 0 B — 25 ms — h2https://c77.bookbot.com/_next/static/chunks/5896-5fce3591cb6450d6.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5896-5fce3591cb6450d6.js — 200 — 0 B — 26 ms — h2https://c77.bookbot.com/_next/static/chunks/1618-42a82ab56d2363c2.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/1618-42a82ab56d2363c2.js — 200 — 0 B — 26 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/sell-books-b3e6559af12f4c3c.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/sell-books-b3e6559af12f4c3c.js — 200 — 0 B — 34 ms — h2https://c77.bookbot.com/_next/static/css/db6d20610ca90e8a.cssc77.bookbot.com/_next/static/css/db... https://c77.bookbot.com/_next/static/css/db6d20610ca90e8a.css — 200 — 2.7 KiB — 15 ms — h2https://c77.bookbot.com/_next/static/chunks/6669-b35c29db4640ae70.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/6669-b35c29db4640ae70.js — 200 — 0 B — 42 ms — h2https://c77.bookbot.com/_next/static/chunks/2826-0a42107f64573e3a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/2826-0a42107f64573e3a.js — 200 — 0 B — 41 ms — h2https://c77.bookbot.com/_next/static/chunks/2606-73fb6db06fc090ae.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/2606-73fb6db06fc090ae.js — 200 — 0 B — 44 ms — h2https://c77.bookbot.com/_next/static/chunks/5581-5141ebacfaf076b5.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/5581-5141ebacfaf076b5.js — 200 — 0 B — 46 ms — h2https://c77.bookbot.com/_next/static/chunks/pages/g/%5Bid%5D/b/%5BbookId%5D-7ca583e2616a9d0a.jsc77.bookbot.com/_next/static/chunks... https://c77.bookbot.com/_next/static/chunks/pages/g/%5Bid%5D/b/%5BbookId%5D-7ca583e2616a9d0a.js — 200 — 0 B — 45 ms — h2https://c77.bookbot.com/_next/static/css/a72edf16851eb079.cssc77.bookbot.com/_next/static/css/a7... https://c77.bookbot.com/_next/static/css/a72edf16851eb079.css — 200 — 5.8 KiB — 19 ms — h2https://c77.bookbot.com/_next/static/css/c8308b913af693d9.cssc77.bookbot.com/_next/static/css/c8... https://c77.bookbot.com/_next/static/css/c8308b913af693d9.css — 200 — 12.2 KiB — 23 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
76% of JavaScript execution is third-party
First-party Third-party 13293ms · 1252KB · Kč5339/mo
c77.bookbot.com
Other
Costly
Execution 6986ms
Transfer 45 KB
Monthly Cost Kč2806/mo
Google Tag Manager
Tag Manager
Costly
Execution 1156ms
Transfer 196 KB
Unused 33%
Monthly Cost Kč464/mo
c77.bookbot.com
Other
Costly
Execution 1120ms
Transfer 40 KB
Unused 58%
Monthly Cost Kč450/mo
c77.bookbot.com
Other
Costly
Execution 844ms
Transfer 144 KB
Unused 43%
Monthly Cost Kč339/mo
Google Tag Manager
Tag Manager
Costly
Execution 653ms
Transfer 182 KB
Unused 40%
Monthly Cost Kč262/mo
Google Tag Manager
Tag Manager
Costly
Execution 415ms
Transfer 158 KB
Unused 47%
Monthly Cost Kč167/mo
c77.bookbot.com
Other
Costly
Execution 406ms
Transfer 8 KB
Monthly Cost Kč163/mo
Google Tag Manager
Tag Manager
Costly
Execution 389ms
Transfer 147 KB
Unused 46%
Monthly Cost Kč156/mo
c77.bookbot.com
Other
Costly
Execution 261ms
Transfer 38 KB
Monthly Cost Kč105/mo
c77.bookbot.com
Other
Costly
Execution 169ms
Transfer 0 KB
Unused 73%
Monthly Cost Kč68/mo
l.seznam.cz
Other
Costly
Execution 165ms
Transfer 103 KB
Unused 42%
Monthly Cost Kč66/mo
c77.bookbot.com
Other
Costly
Execution 165ms
Transfer 0 KB
Unused 73%
Monthly Cost Kč66/mo
l.seznam.cz
Other
Costly
Execution 163ms
Transfer 69 KB
Unused 56%
Monthly Cost Kč66/mo
c77.bookbot.com
Other
Optional
Execution 105ms
Transfer 75 KB
Monthly Cost Kč42/mo
c77.bookbot.com
Other
Optional
Execution 87ms
Transfer 15 KB
Monthly Cost Kč35/mo
c77.bookbot.com
Other
Optional
Execution 73ms
Transfer 1 KB
Monthly Cost Kč29/mo
c77.bookbot.com
Other
Optional
Execution 70ms
Transfer 30 KB
Monthly Cost Kč28/mo
c77.bookbot.com
Other
Optional
Execution 66ms
Transfer 0 KB
Unused 67%
Monthly Cost Kč26/mo

These scripts may cost more than they're worth

  • c77.bookbot.com adds 6986ms and costs ~Kč2806/month
  • Google Tag Manager adds 1156ms and costs ~Kč464/month
  • c77.bookbot.com adds 1120ms and costs ~Kč450/month
  • c77.bookbot.com adds 844ms and costs ~Kč339/month
  • Google Tag Manager adds 653ms and costs ~Kč262/month
  • Google Tag Manager adds 415ms and costs ~Kč167/month
  • c77.bookbot.com adds 406ms and costs ~Kč163/month
  • Google Tag Manager adds 389ms and costs ~Kč156/month
  • c77.bookbot.com adds 261ms and costs ~Kč105/month
  • c77.bookbot.com adds 169ms and costs ~Kč68/month
  • l.seznam.cz adds 165ms and costs ~Kč66/month
  • c77.bookbot.com adds 165ms and costs ~Kč66/month
  • l.seznam.cz adds 163ms and costs ~Kč66/month

76% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

Learn more ▾

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

Source: web.dev

c77.bookbot.com takes 6986ms 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

Google Tag Manager takes 1156ms 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

c77.bookbot.com takes 1120ms 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

58% of c77.bookbot.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

c77.bookbot.com takes 844ms 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

Google Tag Manager takes 653ms 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

Google Tag Manager takes 415ms 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

c77.bookbot.com takes 406ms 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

Google Tag Manager takes 389ms 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

c77.bookbot.com takes 261ms 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

c77.bookbot.com takes 169ms 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

73% of c77.bookbot.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

l.seznam.cz takes 165ms 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

c77.bookbot.com takes 165ms 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

73% of c77.bookbot.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

l.seznam.cz takes 163ms 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

56% of l.seznam.cz's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

67% of c77.bookbot.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

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 (2026-08-10 — 2026-09-06)

LCP (p75)

1841 ms

87% good

INP (p75)

463 ms

38% good

CLS (p75)

0.100

74% good

FCP (p75)

1723 ms

TTFB (p75)

760 ms

Image Optimization
24 images, 240 KB total, 109 KB wasted
INFO

Image Optimization Audit

Total Images

24

Total Size

240 KB

Oversized

4

Wasted

109 KB

1 missing alt text 14 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.

Send Feedback