Access mooc.cn. MOOC中国 - 慕课改变你，你改变世界

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

24/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

51/100

25%

SI (Speed Index)

Value8.5 s

18/100

10%

TBT (Total Blocking Time)

Value350 ms

73/100

30%

CLS (Cumulative Layout Shift)

Value0.056

98/100

15%

TTI (Time to Interactive)

Value7.0 s

53/100

10%

mooc.cn

716 ms

mooc.cn

896 ms

www.cmooc.com

1240 ms

style.css

319 ms

jquery.min.js

841 ms

Our browser made a total of 77 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Mooc.cn, 91% (70 requests) were made to Cmooc.com and 1% (1 request) were made to Cdn.staticfile.org. The less responsive or slowest element that took the longest time to load (2.1 sec) relates to the external source Cmooc.com.

Content Size

332.9 kB

After Optimization

265.6 kB

In fact, the total size of Mooc.cn main page is 332.9 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. 55% of websites need less resources to load. Images take 241.6 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 53.7 kB

Original 65.7 kB
After minification 64.6 kB
After compression 12.1 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 53.7 kB or 82% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

Original 241.6 kB
After minification 241.6 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.

JavaScript Optimization

-48%

Potential reduce by 8.9 kB

Original 18.4 kB
After minification 18.4 kB
After compression 9.5 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 8.9 kB or 48% of the original size.

CSS Optimization

-66%

Potential reduce by 4.7 kB

Original 7.2 kB
After minification 6.8 kB
After compression 2.5 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 4.7 kB or 66% of the original size.

Requests Now

After Optimization

The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mooc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 22 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

Buttons do not have an accessible name

High

Form elements do not have associated labels

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Page has valid source maps

Search Engine Optimization Advices

Language and Encoding

Language Detected

ZH
Language Claimed

ZH
Encoding

UTF-8

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 it matches the claimed language. 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.

Social Sharing Optimization

mooc.cn

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:

Report Summary

Performance

Accessibility

Best Practices

SEO

MOOC中国 - 慕课改变你，你改变世界

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

mooc.cn

mooc.cn

www.cmooc.com

style.css

jquery.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

mooc.cn

mooc.cn

www.cmooc.com

style.css

jquery.min.js

bootstrap.min.js

main.min.css

style.min.css

um-modal.min.css

jquery-ui.min.css

tipsy.min.css

um-raty.min.css

fonticons-ii.min.css

fonticons-fa.min.css

select2.min.css

um-fileupload.min.css

default.min.css

default.date.min.css

default.time.min.css

common.min.css

um-responsive.min.css

um-styles.min.css

cropper.min.css

um-profile.min.css

um-account.min.css

um-misc.min.css

um-old-default.min.css

jweixin-1.6.0.js

jquery.min.js

jquery-migrate.min.js

um-gdpr.min.js

aadf8736c5.js

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