Tools & Wizards About Us
english.shao.cas.cn screenshot

Report Summary

  • 23

    Performance

    Renders faster than
    41% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 81

    SEO

    Google-friendlier than
    42% of websites

english.shao.cas.cn

Shanghai Astronomical Observatory,Chinese Academy of Sciences

Page Load Speed

26.7 sec in total

First Response

1.8 sec

Resources Loaded

23.1 sec

Page Rendered

1.9 sec

english.shao.cas.cn screenshot

About Website

Visit english.shao.cas.cn now to see the best up-to-date English Shao Cas content for China and also check out these interesting facts you probably never knew about english.shao.cas.cn

Astro-geodynamics, Galaxies & Cosmology and Planetary Science are the major basic research fields in SHAO. Meanwhile, SHAO also develops modern technologies for astronomical observations and time & fr...

Visit english.shao.cas.cn

Key Findings

We analyzed English.shao.cas.cn page load time and found that the first response time was 1.8 sec and then it took 25 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

english.shao.cas.cn performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

87/100

10%

LCP (Largest Contentful Paint)

Value89.3 s

0/100

25%

SI (Speed Index)

Value31.8 s

0/100

10%

TBT (Total Blocking Time)

Value5,570 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.175

69/100

15%

TTI (Time to Interactive)

Value8.3 s

39/100

10%

Network Requests Diagram

english.shao.cas.cn

1772 ms

bootstrap.css

1189 ms

font-awesome.min.css

2191 ms

animations.css

488 ms

animate.min.css

731 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 97% of them (38 requests) were addressed to the original English.shao.cas.cn, 3% (1 request) were made to Api.cas.cn. The less responsive or slowest element that took the longest time to load (19.3 sec) belongs to the original domain English.shao.cas.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 176.3 kB (49%)

Content Size

357.0 kB

After Optimization

180.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of English.shao.cas.cn main page is 357.0 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. 35% of websites need less resources to load. Images take 145.5 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 37.5 kB

  • Original 43.8 kB
  • After minification 31.2 kB
  • After compression 6.3 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 12.7 kB, which is 29% 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 37.5 kB or 86% of the original size.

Image Optimization

-66%

Potential reduce by 96.8 kB

  • Original 145.5 kB
  • After minification 48.8 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, English Shao Cas needs image optimization as it can save up to 96.8 kB or 66% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-12%

Potential reduce by 8.4 kB

  • Original 67.7 kB
  • After minification 67.7 kB
  • After compression 59.4 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 8.4 kB or 12% of the original size.

CSS Optimization

-34%

Potential reduce by 33.6 kB

  • Original 99.9 kB
  • After minification 99.9 kB
  • After compression 66.2 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. English.shao.cas.cn needs all CSS files to be minified and compressed as it can save up to 33.6 kB or 34% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (32%)

Requests Now

38

After Optimization

26

  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of English Shao Cas. 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 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

english.shao.cas.cn

english.shao.cas.cn

1772 ms

bootstrap.css

bootstrap.css

1189 ms

font-awesome.min.css

font-awesome.min.css

2191 ms

animations.css

animations.css

488 ms

animate.min.css

animate.min.css

731 ms

publicstyle.css

publicstyle.css

748 ms

webstyle.css

webstyle.css

1254 ms

jquery-1.12.4.min.js

jquery-1.12.4.min.js

1252 ms

jquery.skidder.css

jquery.skidder.css

733 ms

bootstrap.min.js

bootstrap.min.js

973 ms

modernizr.js

modernizr.js

733 ms

template.js

template.js

756 ms

imagesloaded.js

imagesloaded.js

978 ms

smartresize.js

smartresize.js

1007 ms

jquery.skidder.js

jquery.skidder.js

1181 ms

logo.png

logo.png

501 ms

logo-sm.png

logo-sm.png

488 ms

logo-xs.png

logo-xs.png

301 ms

searchbtnbg.png

searchbtnbg.png

245 ms

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W020231114514855371116.jpg

8089 ms

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W020231102386332411581.jpg

16803 ms

W020230928574406111255.png

W020230928574406111255.png

6601 ms

W020230901352035580457.jpg

W020230901352035580457.jpg

19301 ms

W020230809503909452343.jpg

W020230809503909452343.jpg

835 ms

lmbg01.png

lmbg01.png

731 ms

W020231114514852694515.jpg

W020231114514852694515.jpg

9231 ms

W020231102386328973629.jpg

W020231102386328973629.jpg

17549 ms

datebg01.gif

datebg01.gif

6844 ms

datebg02.gif

datebg02.gif

7090 ms

icon02.png

icon02.png

7334 ms

W020201201609181153112.png

W020201201609181153112.png

7579 ms

W020201201609376032481.png

W020201201609376032481.png

7825 ms

W020201201608993906871.png

W020201201608993906871.png

8070 ms

W020201201609555495669.png

W020201201609555495669.png

8315 ms

W020201201609711637166.png

W020201201609711637166.png

8326 ms

footbg.gif

footbg.gif

8559 ms

blue.png

blue.png

8563 ms

ewm01_txt2020.jpg

ewm01_txt2020.jpg

8804 ms

ewm02_txt2020.jpg

ewm02_txt2020.jpg

8802 ms

Accessibility Review

english.shao.cas.cn accessibility score

81

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.

Tables and lists

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

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

english.shao.cas.cn best practices score

75

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

english.shao.cas.cn SEO score

81

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    ZH

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise English.shao.cas.cn can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Chinese language. Our system also found out that English.shao.cas.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

english.shao.cas.cn

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