28.5 sec in total
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We analyzed Mooc.cn page load time and found that the first response time was 1 sec and then it took 27.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.
mooc.cn performance score
Our browser made a total of 66 requests to load all elements on the main page. We found that 82% of them (54 requests) were addressed to the original Mooc.cn, 8% (5 requests) were made to Mtupian.qiniudn.com and 3% (2 requests) were made to 7nar46.com1.z0.glb.clouddn.com. The less responsive or slowest element that took the longest time to load (19.9 sec) relates to the external source 7nar46.com1.z0.glb.clouddn.com.
Page size can be reduced by 175.7 kB (16%)
In fact, the total size of Mooc.cn main page is 1.1 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. 25% of websites need less resources to load. Images take 843.0 kB which makes up the majority of the site volume.
Potential reduce by 16.9 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 16.9 kB or 76% of the original size.
Potential reduce by 10.1 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. Mooc images are well optimized though.
Potential reduce by 112.3 kB
Potential reduce by 36.5 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. Mooc.cn needs all CSS files to be minified and compressed as it can save up to 36.5 kB or 79% of the original size.
Number of requests can be reduced by 4 (7%)
mooc.cn accessibility score
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.
Buttons do not have an accessible name
Form elements do not have associated labels
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
These items highlight common accessibility best practices.
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
mooc.cn best practices score
Trust and Safety
Does not use HTTPS
Ensure CSP is effective against XSS attacks
Page has valid source maps
mooc.cn SEO score
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/).
Document uses legible font sizes
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Mooc.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Mooc.cn 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.
Open Graph description is not detected on the main page of Mooc. 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: