5.6 sec in total
326 ms
4.7 sec
496 ms
Welcome to centrumtance.cz homepage info - get ready to check Centrum Tance best content for Czech Republic right away, or after learning these important things about centrumtance.cz
Centrum Tance – kurzy tance a cvičení v Praze a Brně.
Visit centrumtance.czWe analyzed Centrumtance.cz page load time and found that the first response time was 326 ms and then it took 5.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
centrumtance.cz performance score
name
value
score
weighting
Value4.8 s
11/100
10%
Value11.0 s
0/100
25%
Value6.4 s
41/100
10%
Value230 ms
86/100
30%
Value0.003
100/100
15%
Value14.5 s
9/100
10%
326 ms
540 ms
1837 ms
62 ms
538 ms
Our browser made a total of 75 requests to load all elements on the main page. We found that 61% of them (46 requests) were addressed to the original Centrumtance.cz, 13% (10 requests) were made to Static.centrumtance.cz and 5% (4 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Centrumtance.cz.
Page size can be reduced by 586.1 kB (24%)
2.5 MB
1.9 MB
In fact, the total size of Centrumtance.cz main page is 2.5 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 1.9 MB which makes up the majority of the site volume.
Potential reduce by 52.8 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. 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 52.8 kB or 77% of the original size.
Potential reduce by 161.7 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. Centrum Tance images are well optimized though.
Potential reduce by 210.9 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 210.9 kB or 73% of the original size.
Potential reduce by 160.7 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. Centrumtance.cz needs all CSS files to be minified and compressed as it can save up to 160.7 kB or 87% of the original size.
Number of requests can be reduced by 29 (45%)
65
36
The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centrum Tance. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
centrumtance.cz
326 ms
www.centrumtance.cz
540 ms
default.asp
1837 ms
css
62 ms
jquery-1.11.3.min.js
538 ms
jquery-ui.min.js
50 ms
bootstrap.css
440 ms
bootstrap-theme.css
221 ms
bootstrap.js
441 ms
vyrob_e_dopis.js
219 ms
AC_RunActiveContent.js
341 ms
Url.js
334 ms
jQuery.HashChange.js
337 ms
jquery-ui.css
62 ms
ZeroClipboard.js
461 ms
Base.js
495 ms
nivo-lightbox.css
462 ms
default.css
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nivo-lightbox.min.js
629 ms
less-styles.php
673 ms
default.Base.js
631 ms
nivo-slider.css
630 ms
default.css
678 ms
jquery.nivo.slider.js
455 ms
fbevents.js
139 ms
alice-koudelkova-dsc_3393.jpg
1055 ms
luu_silerova_023.jpg
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lehky-krok-logo.jpg
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michaela-szotkowska-img_3997.jpg
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katerina_kankova_img_3245.jpg
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martina_panochova_9334.jpg
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kveta-hofnerova-img_3795.jpg
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ruzenka_halamkova_wo5n1509.jpg
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aktivity_pro_deti.jpg
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janetta_004.jpg
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background.jpg
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20151204-CT-rozvrh.jpg
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20160126-CT-lehky-krok.jpg
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20160212-CT-akrobaticka-joga.jpg
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hp-icon-slider-01.png
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hp-icon-slider-02.png
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hp-icon-slider-03.png
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hp-icon-slider-04.png
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hp-icon-dance.png
681 ms
hp-icon-body-mind.png
690 ms
hp-icon-fitness.png
685 ms
hp-icon-art.png
767 ms
centrumtance_logo.png
782 ms
gtm.js
65 ms
loading.gif
790 ms
u-WUoqrET9fUeobQW7jkRT8E0i7KZn-EPnyo3HZu7kw.woff
74 ms
DXI1ORHCpsQm3Vp6mXoaTRa1RVmPjeKy21_GQJaLlJI.woff
80 ms
k3k702ZOKiLJc3WVjuplzBa1RVmPjeKy21_GQJaLlJI.woff
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133 ms
background-social.png
778 ms
hp_icon_facebook.png
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hp_icon_youtube.png
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hp_icon_twitter.png
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background-footer.jpg
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glyphicons-halflings-regular.woff
859 ms
conversion_async.js
32 ms
analytics.js
48 ms
retargeting
233 ms
47 ms
ec.js
21 ms
106 ms
65 ms
collect
34 ms
collect
65 ms
ga-audiences
18 ms
arrows.png
118 ms
centrumtance.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.
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
Links do not have a discernible name
centrumtance.cz best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
centrumtance.cz SEO score
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
Tap targets are not sized appropriately
CS
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Centrumtance.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 Centrumtance.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.
centrumtance.cz
Open Graph data is detected on the main page of Centrum Tance. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: