Tools & Wizards About Us
opencla.cntv.cn screenshot

Report Summary

  • 0

    Performance

  • 0

    Accessibility

  • 0

    Best Practices

  • 0

    SEO

opencla.cntv.cn

Page Load Speed

10 sec in total

First Response

1.5 sec

Resources Loaded

7.6 sec

Page Rendered

820 ms

opencla.cntv.cn screenshot

About Website

Click here to check amazing Opencla Cntv content for China. Otherwise, check out these important facts you probably never knew about opencla.cntv.cn

中国公开课是央视网在线教育平台，汇集国内外名校的优质课程，积极传播中国传统文化，建成包括大学、初高中、小学及社会课程在内的全内容体系，覆盖经济学、管理学、文学、历史等广泛学科，独家策划制作原创精品课程，邀请专家学者、名师等答疑解惑、互动分享。

Visit opencla.cntv.cn

Key Findings

We analyzed Opencla.cntv.cn page load time and found that the first response time was 1.5 sec and then it took 8.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

opencla.cntv.cn performance score

0

Network Requests Diagram

opencla.cntv.cn

1522 ms

a2.js

1103 ms

style.css

291 ms

jquery-1.7.2.min.js

294 ms

login.js

301 ms

Our browser made a total of 177 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Opencla.cntv.cn, 74% (131 requests) were made to P1.img.cctvpic.com and 6% (10 requests) were made to P5.img.cctvpic.com. The less responsive or slowest element that took the longest time to load (2.8 sec) relates to the external source Api.search.cntv.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 466.5 kB (33%)

Content Size

1.4 MB

After Optimization

926.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Opencla.cntv.cn main page is 1.4 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. Images take 941.2 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 152.8 kB

  • Original 184.6 kB
  • After minification 164.1 kB
  • After compression 31.8 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 20.5 kB, which is 11% 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 152.8 kB or 83% of the original size.

Image Optimization

-16%

Potential reduce by 155.1 kB

  • Original 941.2 kB
  • After minification 786.1 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. Obviously, Opencla Cntv needs image optimization as it can save up to 155.1 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-56%

Potential reduce by 128.4 kB

  • Original 229.9 kB
  • After minification 219.3 kB
  • After compression 101.5 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 128.4 kB or 56% of the original size.

CSS Optimization

-82%

Potential reduce by 30.2 kB

  • Original 37.0 kB
  • After minification 33.9 kB
  • After compression 6.8 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. Opencla.cntv.cn needs all CSS files to be minified and compressed as it can save up to 30.2 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 57 (38%)

Requests Now

149

After Optimization

92

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 149 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opencla Cntv. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

opencla.cntv.cn

opencla.cntv.cn

1522 ms

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1103 ms

style.css

style.css

291 ms

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jquery-1.7.2.min.js

294 ms

login.js

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301 ms

style.css

style.css

289 ms

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2769 ms

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297 ms

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290 ms

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10 ms

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5 ms

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SEO Factors

opencla.cntv.cn SEO score

0

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Opencla.cntv.cn can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Opencla.cntv.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

opencla.cntv.cn

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