Tools & Wizards About Us
sist.swjtu.edu.cn screenshot

Report Summary

  • 77

    Performance

    Renders faster than
    85% of other websites

  • 46

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

sist.swjtu.edu.cn

西南交通大学 信息科学与技术学院

Page Load Speed

17.7 sec in total

First Response

3 sec

Resources Loaded

14.3 sec

Page Rendered

321 ms

sist.swjtu.edu.cn screenshot

About Website

Click here to check amazing Sist Swjtu content for China. Otherwise, check out these important facts you probably never knew about sist.swjtu.edu.cn

西南交通大学是国内较早创建信息学科的高等学校，早在1960年就开设了计算技术、自动化和无线电电子学等专业。1981年获得计算机及应用专业硕士学位授予权，是国内首批获得该学科硕士学位授予权的单位。学校在1985年成立计算机科学与工程系，1993年成立计算机与通信工程学院，随着学科领域的不断扩展，2005年更名为信息科学与技术学院。经过近五十年的发展，学院形成了以计算机、通信、控制、电子为主干学科的覆...

Visit sist.swjtu.edu.cn

Key Findings

We analyzed Sist.swjtu.edu.cn page load time and found that the first response time was 3 sec and then it took 14.6 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

sist.swjtu.edu.cn performance score

77

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

76/100

25%

SI (Speed Index)

Value9.1 s

13/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value8.3 s

39/100

10%

Network Requests Diagram

index.do

3026 ms

global.css

876 ms

newsSidebar.css

597 ms

SpryTabbedPanels.css

881 ms

mainpage.css

879 ms

Our browser made a total of 104 requests to load all elements on the main page. We found that all of those requests were addressed to Sist.swjtu.edu.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (9.4 sec) belongs to the original domain Sist.swjtu.edu.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.3 MB (55%)

Content Size

2.3 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sist.swjtu.edu.cn main page is 2.3 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. 40% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 101.7 kB

  • Original 115.3 kB
  • After minification 85.3 kB
  • After compression 13.5 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 29.9 kB, which is 26% 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 101.7 kB or 88% of the original size.

Image Optimization

-52%

Potential reduce by 1.1 MB

  • Original 2.0 MB
  • After minification 973.9 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, Sist Swjtu needs image optimization as it can save up to 1.1 MB or 52% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-66%

Potential reduce by 69.2 kB

  • Original 104.6 kB
  • After minification 100.7 kB
  • After compression 35.4 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 69.2 kB or 66% of the original size.

CSS Optimization

-78%

Potential reduce by 16.3 kB

  • Original 20.8 kB
  • After minification 16.2 kB
  • After compression 4.5 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. Sist.swjtu.edu.cn needs all CSS files to be minified and compressed as it can save up to 16.3 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (4%)

Requests Now

103

After Optimization

99

  • Images
  • JavaScript
  • CSS

The browser has sent 103 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sist Swjtu. 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

index.do

index.do

3026 ms

global.css

global.css

876 ms

newsSidebar.css

newsSidebar.css

597 ms

SpryTabbedPanels.css

SpryTabbedPanels.css

881 ms

mainpage.css

mainpage.css

879 ms

index_aside.css

index_aside.css

879 ms

logo1.jpg

logo1.jpg

1462 ms

logo2.jpg

logo2.jpg

1179 ms

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2037 ms

SpryTabbedPanels.js

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1751 ms

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1752 ms

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1758 ms

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1756 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

2389 ms

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1762 ms

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2045 ms

search.jpg

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1831 ms

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2642 ms

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2068 ms

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2109 ms

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2329 ms

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2355 ms

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2358 ms

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2378 ms

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earth.png

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2348 ms

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2365 ms

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2406 ms

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2975 ms

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2973 ms

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logo3.jpg

2976 ms

Accessibility Review

sist.swjtu.edu.cn accessibility score

46

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

Form elements do not have associated labels

High

Links do not have a discernible name

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

sist.swjtu.edu.cn best practices score

58

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

High

Browser errors were logged to the console

SEO Factors

sist.swjtu.edu.cn SEO score

58

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sist.swjtu.edu.cn can be misinterpreted by Google and other search engines. Our service has detected that English 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 Sist.swjtu.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

sist.swjtu.edu.cn

Open Graph description is not detected on the main page of Sist Swjtu. 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: