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cas.teacher.com.cn screenshot

Report Summary

  • 91

    Performance

    Renders faster than
    91% of other websites

  • 50

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

cas.teacher.com.cn

会员登录 - 全国中小学教师继续教育网

Page Load Speed

14.8 sec in total

First Response

2.4 sec

Resources Loaded

12.3 sec

Page Rendered

145 ms

cas.teacher.com.cn screenshot

About Website

Click here to check amazing Cas Teacher content for China. Otherwise, check out these important facts you probably never knew about cas.teacher.com.cn

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Key Findings

We analyzed Cas.teacher.com.cn page load time and found that the first response time was 2.4 sec and then it took 12.4 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

cas.teacher.com.cn performance score

91

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

85/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

78/100

25%

SI (Speed Index)

Value4.3 s

76/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.0 s

99/100

10%

Network Requests Diagram

cas.teacher.com.cn

2369 ms

login.css

5973 ms

foot.js

1110 ms

logo.gif

4214 ms

pre_logo.jpg

3762 ms

Our browser made a total of 10 requests to load all elements on the main page. We found that 20% of them (2 requests) were addressed to the original Cas.teacher.com.cn, 40% (4 requests) were made to Img.teacher.com.cn and 30% (3 requests) were made to S.teachercdn.com.cn. The less responsive or slowest element that took the longest time to load (6 sec) relates to the external source S.teachercdn.com.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 20.8 kB (36%)

Content Size

57.4 kB

After Optimization

36.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cas.teacher.com.cn main page is 57.4 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 38.2 kB which makes up the majority of the site volume.

HTML Optimization

-57%

Potential reduce by 1.8 kB

  • Original 3.2 kB
  • After minification 3.1 kB
  • After compression 1.4 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 1.8 kB or 57% of the original size.

Image Optimization

-18%

Potential reduce by 7.1 kB

  • Original 38.2 kB
  • After minification 31.2 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, Cas Teacher needs image optimization as it can save up to 7.1 kB or 18% 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 844 B

  • Original 1.5 kB
  • After minification 1.5 kB
  • After compression 664 B

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 844 B or 56% of the original size.

CSS Optimization

-76%

Potential reduce by 11.0 kB

  • Original 14.4 kB
  • After minification 10.7 kB
  • After compression 3.4 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. Cas.teacher.com.cn needs all CSS files to be minified and compressed as it can save up to 11.0 kB or 76% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

9

After Optimization

9

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cas Teacher. According to our analytics all requests are already optimized.

Network Requests Diagram

cas.teacher.com.cn

cas.teacher.com.cn

2369 ms

login.css

login.css

5973 ms

foot.js

foot.js

1110 ms

logo.gif

logo.gif

4214 ms

pre_logo.jpg

pre_logo.jpg

3762 ms

frame_login.jhtml

frame_login.jhtml

720 ms

biaoshi.gif

biaoshi.gif

3456 ms

mini-pkg-min.css

mini-pkg-min.css

2078 ms

stuff-red.png

stuff-red.png

2816 ms

entries.png

entries.png

1588 ms

Accessibility Review

cas.teacher.com.cn accessibility score

50

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Best Practices

cas.teacher.com.cn best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

cas.teacher.com.cn SEO score

54

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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 Cas.teacher.com.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 Cas.teacher.com.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

cas.teacher.com.cn

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