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yzb.sjtu.edu.cn screenshot

Report Summary

  • 56

    Performance

    Renders faster than
    73% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

yzb.sjtu.edu.cn

上海交通大学研招网

Page Load Speed

5.2 sec in total

First Response

1.1 sec

Resources Loaded

3.9 sec

Page Rendered

144 ms

yzb.sjtu.edu.cn screenshot

About Website

Visit yzb.sjtu.edu.cn now to see the best up-to-date Yzb Sjtu content for China and also check out these interesting facts you probably never knew about yzb.sjtu.edu.cn

Visit yzb.sjtu.edu.cn

Key Findings

We analyzed Yzb.sjtu.edu.cn page load time and found that the first response time was 1.1 sec and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

yzb.sjtu.edu.cn performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value6.9 s

6/100

25%

SI (Speed Index)

Value10.4 s

8/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.03

100/100

15%

TTI (Time to Interactive)

Value7.2 s

51/100

10%

Network Requests Diagram

home.ahtml

1123 ms

common_style.css

831 ms

content.css

555 ms

Ctype.css

556 ms

Etype.css

560 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that all of those requests were addressed to Yzb.sjtu.edu.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Yzb.sjtu.edu.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 53.4 kB (84%)

Content Size

63.2 kB

After Optimization

9.8 kB

  • HTML
  • CSS

In fact, the total size of Yzb.sjtu.edu.cn main page is 63.2 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only 5% of websites need less resources to load. HTML takes 40.9 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 35.0 kB

  • Original 40.9 kB
  • After minification 37.6 kB
  • After compression 5.9 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. 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 35.0 kB or 86% of the original size.

CSS Optimization

-82%

Potential reduce by 18.4 kB

  • Original 22.3 kB
  • After minification 19.1 kB
  • After compression 3.9 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. Yzb.sjtu.edu.cn needs all CSS files to be minified and compressed as it can save up to 18.4 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (52%)

Requests Now

21

After Optimization

10

  • Images
  • CSS

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Yzb Sjtu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

home.ahtml

home.ahtml

1123 ms

common_style.css

common_style.css

831 ms

content.css

content.css

555 ms

Ctype.css

Ctype.css

556 ms

Etype.css

Etype.css

560 ms

othercss.css

othercss.css

561 ms

index_01_01.gif

index_01_01.gif

831 ms

index_01_02.gif

index_01_02.gif

557 ms

index_01_03.gif

index_01_03.gif

560 ms

index_02_02D.gif

index_02_02D.gif

557 ms

index_02_02AD.gif

index_02_02AD.gif

560 ms

1p.gif

1p.gif

559 ms

index_02_02M.gif

index_02_02M.gif

1110 ms

index_02_02MD.gif

index_02_02MD.gif

1109 ms

index_02_02P.gif

index_02_02P.gif

1109 ms

index_02_02PD.gif

index_02_02PD.gif

1111 ms

index_02_02O.gif

index_02_02O.gif

1109 ms

index_02_02OD.gif

index_02_02OD.gif

1385 ms

lxfs1.gif

lxfs1.gif

1660 ms

lxfs3.gif

lxfs3.gif

1660 ms

index_03.gif

index_03.gif

1660 ms

lxfs2.gif

lxfs2.gif

1624 ms

Accessibility Review

yzb.sjtu.edu.cn accessibility score

61

Accessibility Issues

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

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

yzb.sjtu.edu.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

yzb.sjtu.edu.cn SEO score

83

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

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

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 Yzb.sjtu.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 Yzb.sjtu.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

yzb.sjtu.edu.cn

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