2.1 sec in total
653 ms
1.4 sec
72 ms
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Visit mcourser.czWe analyzed Mcourser.cz page load time and found that the first response time was 653 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.
mcourser.cz performance score
name
value
score
weighting
Value7.0 s
1/100
10%
Value21.9 s
0/100
25%
Value14.6 s
1/100
10%
Value1,900 ms
8/100
30%
Value0
100/100
15%
Value29.2 s
0/100
10%
653 ms
40 ms
35 ms
103 ms
40 ms
Our browser made a total of 29 requests to load all elements on the main page. We found that all of those requests were addressed to Mcourser.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (653 ms) belongs to the original domain Mcourser.cz.
Page size can be reduced by 495.5 kB (38%)
1.3 MB
811.6 kB
In fact, the total size of Mcourser.cz main page is 1.3 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. 60% of websites need less resources to load. Javascripts take 806.0 kB which makes up the majority of the site volume.
Potential reduce by 7.2 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 2.2 kB, which is 24% 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 7.2 kB or 79% of the original size.
Potential reduce by 277.9 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 277.9 kB or 34% of the original size.
Potential reduce by 210.3 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. Mcourser.cz needs all CSS files to be minified and compressed as it can save up to 210.3 kB or 43% of the original size.
Number of requests can be reduced by 26 (93%)
28
2
The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of MCourser. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
www.mcourser.cz
653 ms
instanceDetection.js
40 ms
mCourserOtAutoBlock.js
35 ms
jQuery-3.3.1.js
103 ms
jQuery-ui-1.12.1.js
40 ms
tinymce.min.js
167 ms
theme.min.js
46 ms
plugin.min.js
42 ms
plugin.min.js
46 ms
content.min.css
82 ms
skin.min.css
83 ms
janus.js
126 ms
jquery-ui-nestedSortable.js
101 ms
baseUrls.js
129 ms
styles.c7bd5f20f0cac526faa0.css
91 ms
base.styles.ff2ce6337d7b463188ad.css
279 ms
other-modules.styles.ff2ce6337d7b463188ad.css
255 ms
lesson.styles.ff2ce6337d7b463188ad.css
246 ms
bq-eventlogger.js
245 ms
screen.js
245 ms
mCourserOtSDKStub.js
255 ms
styles.d0e518afe63c65b6d2b7.bundle.js
254 ms
runtime-es2015.61822955b5d8d22c6293.js
276 ms
runtime-es5.61822955b5d8d22c6293.js
276 ms
polyfills-es5.a72d086095a1a62503e6.js
327 ms
polyfills-es2015.c2541dc47b8e9078d310.js
275 ms
scripts.c20fa8bf808e072875be.js
365 ms
main-es2015.25e6dd32e3816c0b670c.js
468 ms
main-es5.25e6dd32e3816c0b670c.js
488 ms
mcourser.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
mcourser.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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
mcourser.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
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Mcourser.cz can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Mcourser.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.
mcourser.cz
Open Graph description is not detected on the main page of MCourser. 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: