9.1 sec in total
439 ms
8.5 sec
217 ms
Click here to check amazing SJS content for Russia. Otherwise, check out these important facts you probably never knew about sjs.cz
Široká nabídka jazykových kurzů. Pořádáme státní i mezinárodní zkoušky. První ukázková hodina zdarma.
Visit sjs.czWe analyzed Sjs.cz page load time and found that the first response time was 439 ms and then it took 8.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
sjs.cz performance score
name
value
score
weighting
Value4.2 s
19/100
10%
Value7.5 s
4/100
25%
Value8.5 s
18/100
10%
Value660 ms
45/100
30%
Value0.063
97/100
15%
Value9.7 s
28/100
10%
439 ms
2516 ms
120 ms
236 ms
1696 ms
Our browser made a total of 73 requests to load all elements on the main page. We found that 47% of them (34 requests) were addressed to the original Sjs.cz, 27% (20 requests) were made to Static.xx.fbcdn.net and 15% (11 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (3.2 sec) belongs to the original domain Sjs.cz.
Page size can be reduced by 250.5 kB (39%)
643.0 kB
392.5 kB
In fact, the total size of Sjs.cz main page is 643.0 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. 50% of websites need less resources to load. Images take 341.4 kB which makes up the majority of the site volume.
Potential reduce by 20.3 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 4.2 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 20.3 kB or 80% of the original size.
Potential reduce by 33.5 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. SJS images are well optimized though.
Potential reduce by 133.3 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 133.3 kB or 66% of the original size.
Potential reduce by 63.4 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. Sjs.cz needs all CSS files to be minified and compressed as it can save up to 63.4 kB or 86% of the original size.
Number of requests can be reduced by 39 (57%)
68
29
The browser has sent 68 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SJS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
sjs.cz
439 ms
www.sjs.cz
2516 ms
reset.css
120 ms
userBar.css
236 ms
wysiwyg.css
1696 ms
style.css
239 ms
opentip.css
237 ms
frontend.css
3200 ms
jquery-1.8.3.js
8 ms
less-1.3.0.min.js
358 ms
functions.js
352 ms
jquery.cookie.js
352 ms
slideshow.js
354 ms
chosen.js
472 ms
opentip-jquery-excanvas.min.js
473 ms
global.js
472 ms
retargeting.js
460 ms
dc.js
102 ms
piwik.js
706 ms
logo.jpg
235 ms
prepinac_active.png
118 ms
prepinac.png
120 ms
8c1010bc4e67e7c6bfbcb6b6c98eaa5b_banner-jpg.jpg
670 ms
a257e605a7d1b98322f30badc38f2621_banner2-jpg.jpg
665 ms
28c71614b850b2f8cbf5ac9a34544bab_banner-tradice-jpg.jpg
351 ms
menu2_bg.png
235 ms
en_flag.jpg
236 ms
ru_flag.jpg
349 ms
th_bg.jpg
352 ms
sipka.png
352 ms
news_h_bg.jpg
665 ms
news_bg.png
665 ms
sipka2.png
665 ms
kluk.png
666 ms
select.png
689 ms
contact_bg.jpg
688 ms
praha.jpg
688 ms
retargeting
118 ms
likebox.php
139 ms
__utm.gif
12 ms
hDvwL1_H7g-.css
88 ms
56WNbrUYLbL.css
107 ms
GN27K_co9Wc.css
128 ms
q68gy-v_YMF.js
179 ms
FJmpeSpHpjS.js
208 ms
0wM5s1Khldu.js
143 ms
1bNoFZUdlYZ.js
146 ms
OloiM1PZafe.js
144 ms
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231 ms
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206 ms
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229 ms
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230 ms
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230 ms
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230 ms
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288 ms
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213 ms
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326 ms
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256 ms
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319 ms
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287 ms
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274 ms
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273 ms
wL6VQj7Ab77.png
143 ms
s7jcwEQH7Sx.png
143 ms
gxbPuQdXIZP.png
61 ms
piwik.php
275 ms
print.css
1581 ms
I6-MnjEovm5.js
19 ms
pQrUxxo5oQp.js
20 ms
sjs.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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Form elements do not have associated labels
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
sjs.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
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
sjs.cz SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
CS
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sjs.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it does not match the claimed English language. Our system also found out that Sjs.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.
sjs.cz
Open Graph description is not detected on the main page of SJS. 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: