Report Summary

  • 50

    Performance

    Renders faster than
    69% of other websites

  • 64

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

chinesemooc.org

华文慕课 - 中文MOOC平台

Page Load Speed

12.7 sec in total

First Response

790 ms

Resources Loaded

11.2 sec

Page Rendered

724 ms

chinesemooc.org screenshot

About Website

Visit chinesemooc.org now to see the best up-to-date Chinesemooc content for China and also check out these interesting facts you probably never knew about chinesemooc.org

华文慕课是一个以中文为主的慕课(MOOC)服务平台,旨在为全球华人服务,为用户提供来自北大等知名高校的免费课程。

Visit chinesemooc.org

Key Findings

We analyzed Chinesemooc.org page load time and found that the first response time was 790 ms and then it took 11.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

chinesemooc.org performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value8.5 s

2/100

25%

SI (Speed Index)

Value7.5 s

26/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.097

90/100

15%

TTI (Time to Interactive)

Value11.7 s

17/100

10%

Network Requests Diagram

chinesemooc.org

790 ms

www.chinesemooc.org

820 ms

common.css

4161 ms

register.css

4571 ms

login.css

4353 ms

Our browser made a total of 67 requests to load all elements on the main page. We found that 4% of them (3 requests) were addressed to the original Chinesemooc.org, 69% (46 requests) were made to Img.chinesemooc.org and 24% (16 requests) were made to I1.chinesemooc.org. The less responsive or slowest element that took the longest time to load (8.1 sec) relates to the external source Img.chinesemooc.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 502.3 kB (18%)

Content Size

2.8 MB

After Optimization

2.3 MB

In fact, the total size of Chinesemooc.org main page is 2.8 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. 50% of websites need less resources to load. Images take 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 57.1 kB

  • Original 69.7 kB
  • After minification 51.2 kB
  • After compression 12.6 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 18.5 kB, which is 26% 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 57.1 kB or 82% of the original size.

Image Optimization

-9%

Potential reduce by 220.3 kB

  • Original 2.4 MB
  • After minification 2.2 MB

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. Chinesemooc images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 122.4 kB

  • Original 181.1 kB
  • After minification 175.8 kB
  • After compression 58.7 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 122.4 kB or 68% of the original size.

CSS Optimization

-83%

Potential reduce by 102.5 kB

  • Original 122.9 kB
  • After minification 111.7 kB
  • After compression 20.4 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. Chinesemooc.org needs all CSS files to be minified and compressed as it can save up to 102.5 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (25%)

Requests Now

65

After Optimization

49

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chinesemooc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

chinesemooc.org accessibility score

64

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

chinesemooc.org best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

chinesemooc.org SEO score

92

Search Engine Optimization Advices

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chinesemooc.org 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 Chinesemooc.org 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

Open Graph description is not detected on the main page of Chinesemooc. 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: