Tools & Wizards About Us
cvf.cz screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

cvf.cz

Homepage | ČVS

Page Load Speed

4.2 sec in total

First Response

292 ms

Resources Loaded

3.4 sec

Page Rendered

509 ms

cvf.cz screenshot

About Website

Welcome to cvf.cz homepage info - get ready to check Cvf best content for Czech Republic right away, or after learning these important things about cvf.cz

Oficiální web Českého volejbalového svazu. Aktuální zprávy, soutěže, reprezentace, výsledky, kalendář akcí, beachvolejbal, mládež i informace pro kluby a rozhodčí.

Visit cvf.cz

Key Findings

We analyzed Cvf.cz page load time and found that the first response time was 292 ms and then it took 3.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

cvf.cz performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.0 s

1/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value11.1 s

6/100

10%

TBT (Total Blocking Time)

Value270 ms

82/100

30%

CLS (Cumulative Layout Shift)

Value0.212

59/100

15%

TTI (Time to Interactive)

Value8.3 s

40/100

10%

Network Requests Diagram

cvf.cz

292 ms

cvf.cz

388 ms

www.cvf.cz

677 ms

gtm.js

70 ms

bootstrap.min.css

40 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 68% of them (53 requests) were addressed to the original Cvf.cz, 6% (5 requests) were made to Googletagmanager.com and 4% (3 requests) were made to Maxcdn.bootstrapcdn.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Cvf.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 697.1 kB (12%)

Content Size

5.6 MB

After Optimization

4.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cvf.cz main page is 5.6 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 60% of websites need less resources to load. Images take 5.2 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 111.0 kB

  • Original 129.8 kB
  • After minification 99.7 kB
  • After compression 18.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 30.1 kB, which is 23% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 111.0 kB or 85% of the original size.

Image Optimization

-10%

Potential reduce by 525.2 kB

  • Original 5.2 MB
  • After minification 4.7 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Cvf images are well optimized though.

JavaScript Optimization

-21%

Potential reduce by 56.8 kB

  • Original 273.9 kB
  • After minification 273.9 kB
  • After compression 217.1 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 56.8 kB or 21% of the original size.

CSS Optimization

-15%

Potential reduce by 4.2 kB

  • Original 28.0 kB
  • After minification 28.0 kB
  • After compression 23.8 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Cvf.cz needs all CSS files to be minified and compressed as it can save up to 4.2 kB or 15% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (41%)

Requests Now

73

After Optimization

43

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cvf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

cvf.cz

cvf.cz

292 ms

cvf.cz

cvf.cz

388 ms

www.cvf.cz

www.cvf.cz

677 ms

gtm.js

gtm.js

70 ms

bootstrap.min.css

bootstrap.min.css

40 ms

nonresponsive-bootstrap2.css

nonresponsive-bootstrap2.css

197 ms

jquery.min.js

jquery.min.js

34 ms

bootstrap.min.js

bootstrap.min.js

48 ms

jssor.slider.mini.js

jssor.slider.mini.js

281 ms

moment-with-locales.js

moment-with-locales.js

507 ms

bootstrap-datetimepicker.js

bootstrap-datetimepicker.js

408 ms

proklik.js

proklik.js

374 ms

css

css

52 ms

css

css

95 ms

css

css

96 ms

cvf.css

cvf.css

494 ms

datum.css

datum.css

466 ms

dw_scroll_c.js

dw_scroll_c.js

501 ms

js

js

94 ms

destination

destination

58 ms

scroll_multi.css

scroll_multi.css

95 ms

js

js

74 ms

mqdefault.jpg

mqdefault.jpg

67 ms

mqdefault.jpg

mqdefault.jpg

85 ms

mqdefault.jpg

mqdefault.jpg

298 ms

banner_970x902.png

banner_970x902.png

299 ms

symboly.png

symboly.png

175 ms

bg-btn-cvf.png

bg-btn-cvf.png

175 ms

logo_cvf_w1.png

logo_cvf_w1.png

173 ms

CEZ_bila.png

CEZ_bila.png

320 ms

mapa_cr3.png

mapa_cr3.png

301 ms

repre%20cev%20cover%202022.jpg

repre%20cev%20cover%202022.jpg

653 ms

CVS_banner_LIVE_STREAM_200x200px_ver_1.jpg

CVS_banner_LIVE_STREAM_200x200px_ver_1.jpg

302 ms

Marik.jpg

Marik.jpg

840 ms

mascia-kv.jpeg

mascia-kv.jpeg

844 ms

001_foto.jpg

001_foto.jpg

751 ms

new_logo_630_400.png

new_logo_630_400.png

396 ms

CEZ-Nadace_EPP_Pfeffer_324x118px.jpg

CEZ-Nadace_EPP_Pfeffer_324x118px.jpg

490 ms

SNS_banner_324x118.jpg

SNS_banner_324x118.jpg

585 ms

CVS_banner_TV_324x118_px_ver_1_nahled.jpg

CVS_banner_TV_324x118_px_ver_1_nahled.jpg

719 ms

CEZ-Nadace_EPP_Pfeffer_334x169px.jpg

CEZ-Nadace_EPP_Pfeffer_334x169px.jpg

678 ms

web_reklama2.png

web_reklama2.png

745 ms

CVS_ODM_banner_324x118px_ver_1_nahled.jpg

CVS_ODM_banner_324x118px_ver_1_nahled.jpg

771 ms

tn.php

tn.php

814 ms

CEZ_150x150px.png

CEZ_150x150px.png

841 ms

AutoEder.png

AutoEder.png

845 ms

NSA.png

NSA.png

864 ms

Gala.png

Gala.png

905 ms

Chance.png

Chance.png

930 ms

gerflor.png

gerflor.png

932 ms

mizuno.png

mizuno.png

934 ms

SU.png

SU.png

936 ms

direct.png

direct.png

956 ms

SUAS.png

SUAS.png

998 ms

brother.png

brother.png

1023 ms

logo_cvf_new_white.png

logo_cvf_new_white.png

1024 ms

logo_fivb.png

logo_fivb.png

1025 ms

logo_cev.png

logo_cev.png

1028 ms

line-150.png

line-150.png

1024 ms

bg-menu.png

bg-menu.png

1060 ms

js

js

130 ms

analytics.js

analytics.js

124 ms

font

font

120 ms

font

font

123 ms

bg-modra-prech.png

bg-modra-prech.png

1056 ms

sdk.js

sdk.js

190 ms

tabulka.php

tabulka.php

952 ms

btn-up.gif

btn-up.gif

948 ms

btn-dn.gif

btn-dn.gif

954 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

108 ms

font

font

106 ms

collect

collect

91 ms

cvf-social.ttf

cvf-social.ttf

848 ms

line-10a.png

line-10a.png

886 ms

sdk.js

sdk.js

12 ms

collect

collect

44 ms

30 ms

retargeting.js

retargeting.js

690 ms

Accessibility Review

cvf.cz accessibility score

70

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

cvf.cz best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

cvf.cz SEO score

83

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cvf.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Cvf.cz main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

cvf.cz

Open Graph description is not detected on the main page of Cvf. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: