4.1 sec in total
336 ms
3.5 sec
233 ms
Click here to check amazing B 7 U content. Otherwise, check out these important facts you probably never knew about b7u.cz
Bezpečnostní agentura D.I.SEVEN SERVICE - profesionální bezpečnostní a úklidové služby s možností náhradního plnění, zabezpečení sportovních, společenských a kulturních akcí.
Visit b7u.czWe analyzed B7u.cz page load time and found that the first response time was 336 ms and then it took 3.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
b7u.cz performance score
name
value
score
weighting
Value5.8 s
4/100
10%
Value6.0 s
13/100
25%
Value17.0 s
0/100
10%
Value1,960 ms
8/100
30%
Value0.069
96/100
15%
Value15.6 s
6/100
10%
336 ms
603 ms
424 ms
214 ms
216 ms
Our browser made a total of 34 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original B7u.cz, 71% (24 requests) were made to Disevenservice.cz and 12% (4 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.8 sec) relates to the external source Disevenservice.cz.
Page size can be reduced by 140.3 kB (28%)
494.1 kB
353.8 kB
In fact, the total size of B7u.cz main page is 494.1 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. 15% of websites need less resources to load. Images take 248.1 kB which makes up the majority of the site volume.
Potential reduce by 17.2 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. This page needs HTML code to be minified as it can gain 3.9 kB, which is 17% 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 17.2 kB or 74% of the original size.
Potential reduce by 959 B
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. B 7 U images are well optimized though.
Potential reduce by 105.5 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 105.5 kB or 52% of the original size.
Potential reduce by 16.7 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. B7u.cz needs all CSS files to be minified and compressed as it can save up to 16.7 kB or 78% of the original size.
Number of requests can be reduced by 15 (48%)
31
16
The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of B 7 U. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.
b7u.cz
336 ms
www.disevenservice.cz
603 ms
core.css
424 ms
extended.css
214 ms
gslider.css
216 ms
jquery.js
937 ms
gslider.js
399 ms
main.js
310 ms
swfobject.js
426 ms
conversion.js
15 ms
retargeting.js
225 ms
analytics.js
48 ms
ga.js
47 ms
hp-col.gif
1082 ms
rCorner1.gif
1104 ms
kalkulator-nahradniho-plneni.jpg
1131 ms
logo-linde1.gif
1124 ms
vltava-labe-press.jpg
1216 ms
bg-banner-free.png
1504 ms
bg-arrow.png
1199 ms
lines2.gif
1209 ms
logo2.png
1395 ms
3.jpg
1823 ms
1.jpg
1725 ms
2.jpg
1735 ms
bg-lines.png
1479 ms
podporujeme_s.jpg
1547 ms
68 ms
collect
46 ms
__utm.gif
28 ms
retargeting
114 ms
bg-red.png
1490 ms
bg-black.png
1510 ms
28 ms
b7u.cz accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
b7u.cz best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
b7u.cz SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Document uses legible font sizes
CS
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise B7u.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 B7u.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.
b7u.cz
Open Graph description is not detected on the main page of B 7 U. 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: