Tools & Wizards About Us
vdi.tju.edu.cn screenshot

Report Summary

  • 96

    Performance

    Renders faster than
    94% of other websites

  • 49

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

vdi.tju.edu.cn

VMware Horizon

Page Load Speed

10.8 sec in total

First Response

900 ms

Resources Loaded

9.7 sec

Page Rendered

205 ms

vdi.tju.edu.cn screenshot

About Website

Visit vdi.tju.edu.cn now to see the best up-to-date Vdi Tju content for China and also check out these interesting facts you probably never knew about vdi.tju.edu.cn

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Key Findings

We analyzed Vdi.tju.edu.cn page load time and found that the first response time was 900 ms and then it took 9.9 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

vdi.tju.edu.cn performance score

96

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.5 s

96/100

10%

LCP (Largest Contentful Paint)

Value1.6 s

99/100

25%

SI (Speed Index)

Value4.7 s

70/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.5 s

100/100

10%

Network Requests Diagram

vdi.tju.edu.cn

900 ms

vdi.tju.edu.cn

1074 ms

index.html

800 ms

ctxs.mainstyle.css

266 ms

ctxs.authentication.css

533 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that all of those requests were addressed to Vdi.tju.edu.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (3.2 sec) belongs to the original domain Vdi.tju.edu.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 56.8 kB (24%)

Content Size

233.8 kB

After Optimization

177.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vdi.tju.edu.cn main page is 233.8 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. 15% of websites need less resources to load. Images take 177.1 kB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 3.7 kB

  • Original 5.6 kB
  • After minification 4.5 kB
  • After compression 1.9 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 1.1 kB, which is 19% 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 3.7 kB or 66% of the original size.

Image Optimization

-6%

Potential reduce by 10.9 kB

  • Original 177.1 kB
  • After minification 166.2 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. Vdi Tju images are well optimized though.

JavaScript Optimization

-84%

Potential reduce by 29.3 kB

  • Original 35.1 kB
  • After minification 24.0 kB
  • After compression 5.8 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 29.3 kB or 84% of the original size.

CSS Optimization

-80%

Potential reduce by 12.9 kB

  • Original 16.1 kB
  • After minification 12.2 kB
  • After compression 3.2 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. Vdi.tju.edu.cn needs all CSS files to be minified and compressed as it can save up to 12.9 kB or 80% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

11

After Optimization

11

  • Images
  • JavaScript
  • CSS

The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vdi Tju. According to our analytics all requests are already optimized.

Network Requests Diagram

vdi.tju.edu.cn

vdi.tju.edu.cn

900 ms

vdi.tju.edu.cn

vdi.tju.edu.cn

1074 ms

index.html

index.html

800 ms

ctxs.mainstyle.css

ctxs.mainstyle.css

266 ms

ctxs.authentication.css

ctxs.authentication.css

533 ms

resources.js

resources.js

1275 ms

nsshare.js

nsshare.js

1275 ms

login.js

login.js

797 ms

bg_bubbles.jpg

bg_bubbles.jpg

3206 ms

VerticalGreenBarOnly.png

VerticalGreenBarOnly.png

265 ms

Screen_SemiTranslucent.png

Screen_SemiTranslucent.png

267 ms

logo_notagline.png

logo_notagline.png

2399 ms

Chrome_field_normal.png

Chrome_field_normal.png

266 ms

Button_LogOn_idle.png

Button_LogOn_idle.png

267 ms

Accessibility Review

vdi.tju.edu.cn accessibility score

49

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

vdi.tju.edu.cn best practices score

75

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

vdi.tju.edu.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

    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 Vdi.tju.edu.cn 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 Vdi.tju.edu.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

vdi.tju.edu.cn

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