Tools & Wizards About Us
df.biom.cz screenshot

Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 89

    SEO

    Google-friendlier than
    66% of websites

df.biom.cz

Biom :: biomasa, biopaliva, bioplyn, pelety, kompostování, ...

Page Load Speed

3.5 sec in total

First Response

387 ms

Resources Loaded

2.7 sec

Page Rendered

481 ms

df.biom.cz screenshot

About Website

Visit df.biom.cz now to see the best up-to-date Df Biom content for Czech Republic and also check out these interesting facts you probably never knew about df.biom.cz

Odborný internetový portál zabývající se tématy: biomasa, biopaliva, bioplyn, pelety, kompostování...

Visit df.biom.cz

Key Findings

We analyzed Df.biom.cz page load time and found that the first response time was 387 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

df.biom.cz performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

29/100

10%

LCP (Largest Contentful Paint)

Value7.7 s

3/100

25%

SI (Speed Index)

Value5.9 s

48/100

10%

TBT (Total Blocking Time)

Value520 ms

57/100

30%

CLS (Cumulative Layout Shift)

Value0.007

100/100

15%

TTI (Time to Interactive)

Value10.6 s

23/100

10%

Network Requests Diagram

df.biom.cz

387 ms

biom.cz

502 ms

aa-system.css

98 ms

biom2017.css

193 ms

jquery.min.js

63 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Df.biom.cz, 59% (33 requests) were made to Biom.cz and 9% (5 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Biom.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 74.8 kB (24%)

Content Size

314.8 kB

After Optimization

240.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Df.biom.cz main page is 314.8 kB. 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 202.0 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 39.1 kB

  • Original 51.2 kB
  • After minification 48.1 kB
  • After compression 12.1 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 39.1 kB or 76% of the original size.

Image Optimization

-13%

Potential reduce by 26.1 kB

  • Original 202.0 kB
  • After minification 175.9 kB

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. Obviously, Df Biom needs image optimization as it can save up to 26.1 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 119 B

  • Original 45.2 kB
  • After minification 45.2 kB
  • After compression 45.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-58%

Potential reduce by 9.5 kB

  • Original 16.4 kB
  • After minification 8.4 kB
  • After compression 6.9 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. Df.biom.cz needs all CSS files to be minified and compressed as it can save up to 9.5 kB or 58% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (34%)

Requests Now

47

After Optimization

31

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 47 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Df Biom. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

df.biom.cz

df.biom.cz

387 ms

biom.cz

biom.cz

502 ms

aa-system.css

aa-system.css

98 ms

biom2017.css

biom2017.css

193 ms

jquery.min.js

jquery.min.js

63 ms

aajslib-jquery.min.js

aajslib-jquery.min.js

285 ms

js

js

72 ms

widgets.js

widgets.js

119 ms

css

css

62 ms

jsapi

jsapi

54 ms

jsview.php3

jsview.php3

353 ms

jsview.php3

jsview.php3

352 ms

jsview.php3

jsview.php3

354 ms

jsview.php3

jsview.php3

352 ms

smart-eu-cookies.min.js

smart-eu-cookies.min.js

72 ms

loader.js

loader.js

20 ms

logo-bim-cz.png

logo-bim-cz.png

142 ms

img.php

img.php

278 ms

img.php

img.php

143 ms

img.php

img.php

159 ms

loader.gif

loader.gif

159 ms

img.php

img.php

159 ms

img.php

img.php

283 ms

img.php

img.php

282 ms

img.php

img.php

282 ms

img.php

img.php

282 ms

img.php

img.php

282 ms

img.php

img.php

281 ms

img.php

img.php

413 ms

img.php

img.php

1383 ms

img.php

img.php

412 ms

img.php

img.php

1383 ms

img.php

img.php

1382 ms

img.php

img.php

412 ms

mark-bioplyn.png

mark-bioplyn.png

472 ms

biom-ikona.gif

biom-ikona.gif

472 ms

logo-mz.jpg

logo-mz.jpg

477 ms

pattern1w.png

pattern1w.png

689 ms

js

js

77 ms

analytics.js

analytics.js

72 ms

logo-biom-cz.png

logo-biom-cz.png

442 ms

iJWZBXyIfDnIV5PNhY1KTN7Z-Yh-WYiFWUUw.ttf

iJWZBXyIfDnIV5PNhY1KTN7Z-Yh-WYiFWUUw.ttf

121 ms

iJWZBXyIfDnIV5PNhY1KTN7Z-Yh-B4iFWUUw.ttf

iJWZBXyIfDnIV5PNhY1KTN7Z-Yh-B4iFWUUw.ttf

154 ms

iJWZBXyIfDnIV5PNhY1KTN7Z-Yh-NYiFWUUw.ttf

iJWZBXyIfDnIV5PNhY1KTN7Z-Yh-NYiFWUUw.ttf

167 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4uaVc.ttf

164 ms

iJWbBXyIfDnIV7nEt3KSJbVDV49rz8sDE3U5f4c.ttf

iJWbBXyIfDnIV7nEt3KSJbVDV49rz8sDE3U5f4c.ttf

165 ms

collect

collect

29 ms

bioplynove-stanice-mapa-clear.png

bioplynove-stanice-mapa-clear.png

399 ms

sdk.js

sdk.js

48 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

95 ms

sdk.js

sdk.js

6 ms

settings

settings

95 ms

button.856debeac157d9669cf51e73a08fbc93.js

button.856debeac157d9669cf51e73a08fbc93.js

21 ms

embeds

embeds

44 ms

tweet_button.2f70fb173b9000da126c79afe2098f02.cs.html

tweet_button.2f70fb173b9000da126c79afe2098f02.cs.html

36 ms

print.css

print.css

96 ms

Accessibility Review

df.biom.cz accessibility score

84

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Best Practices

df.biom.cz best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

Browser errors were logged to the console

SEO Factors

df.biom.cz SEO score

89

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

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 Df.biom.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 Df.biom.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

df.biom.cz

Open Graph data is detected on the main page of Df Biom. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: