Tools & Wizards About Us
drevoastavby.cz screenshot

Report Summary

  • 4

    Performance

    Renders faster than
    20% of other websites

  • 51

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

drevoastavby.cz

Dřevostavby - Portál | Dřevostavby, časopis o bydlení - DřevoStavby

Page Load Speed

15.8 sec in total

First Response

396 ms

Resources Loaded

14.7 sec

Page Rendered

686 ms

drevoastavby.cz screenshot

About Website

Visit drevoastavby.cz now to see the best up-to-date Drevoa Stavby content for Czech Republic and also check out these interesting facts you probably never knew about drevoastavby.cz

Největší portál zaměřený na montované dřevostavby i sendvičové dřevostavby, sruby, roubenky, pasivní a nízkoenergetické dřevostavby a jejich projekty

Visit drevoastavby.cz

Key Findings

We analyzed Drevoastavby.cz page load time and found that the first response time was 396 ms and then it took 15.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

drevoastavby.cz performance score

4

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value30.6 s

0/100

25%

SI (Speed Index)

Value21.3 s

0/100

10%

TBT (Total Blocking Time)

Value2,030 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0.536

14/100

15%

TTI (Time to Interactive)

Value34.7 s

0/100

10%

Network Requests Diagram

drevoastavby.cz

396 ms

www.drevoastavby.cz

3504 ms

style.css

287 ms

jcemediabox.css

285 ms

style.css

282 ms

Our browser made a total of 138 requests to load all elements on the main page. We found that 66% of them (91 requests) were addressed to the original Drevoastavby.cz, 14% (20 requests) were made to Static.xx.fbcdn.net and 4% (5 requests) were made to External.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (5.7 sec) belongs to the original domain Drevoastavby.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 650.7 kB (23%)

Content Size

2.8 MB

After Optimization

2.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Drevoastavby.cz main page is 2.8 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. 55% of websites need less resources to load. Images take 2.1 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 70.5 kB

  • Original 88.6 kB
  • After minification 84.9 kB
  • After compression 18.2 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 70.5 kB or 80% of the original size.

Image Optimization

-8%

Potential reduce by 164.7 kB

  • Original 2.1 MB
  • After minification 2.0 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. Drevoa Stavby images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 233.9 kB

  • Original 361.8 kB
  • After minification 333.5 kB
  • After compression 127.8 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 233.9 kB or 65% of the original size.

CSS Optimization

-84%

Potential reduce by 181.5 kB

  • Original 217.1 kB
  • After minification 180.7 kB
  • After compression 35.5 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. Drevoastavby.cz needs all CSS files to be minified and compressed as it can save up to 181.5 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 54 (40%)

Requests Now

134

After Optimization

80

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 134 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Drevoa Stavby. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

drevoastavby.cz

drevoastavby.cz

396 ms

www.drevoastavby.cz

www.drevoastavby.cz

3504 ms

style.css

style.css

287 ms

jcemediabox.css

jcemediabox.css

285 ms

style.css

style.css

282 ms

mootools.js

mootools.js

944 ms

caption.js

caption.js

287 ms

jcemediabox.js

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1089 ms

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562 ms

template.js

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434 ms

style.css

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562 ms

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1640 ms

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module_renaming.css

843 ms

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1887 ms

jquery.min.js

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30 ms

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12 ms

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1301 ms

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1255 ms

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1403 ms

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254 ms

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556 ms

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Accessibility Review

drevoastavby.cz accessibility score

51

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

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

High

Form elements do not have associated labels

High

Links do not have a discernible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

drevoastavby.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

SEO Factors

drevoastavby.cz SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Drevoastavby.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Drevoastavby.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

drevoastavby.cz

Open Graph description is not detected on the main page of Drevoa Stavby. 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: