Tools & Wizards About Us
xuetong.com screenshot

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

xuetong.com

学通在线 - 土豆老师讲奥数 小初高数学 精品视频课程 - Powered By EduSoho

Page Load Speed

9.8 sec in total

First Response

696 ms

Resources Loaded

8.9 sec

Page Rendered

170 ms

xuetong.com screenshot

About Website

Click here to check amazing Xuetong content. Otherwise, check out these important facts you probably never knew about xuetong.com

学通在线（xuetong.com），职业技能培训和认证一站式平台 & 中小学在线学习平台。

Visit xuetong.com

Key Findings

We analyzed Xuetong.com page load time and found that the first response time was 696 ms and then it took 9.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

xuetong.com performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.7 s

2/100

10%

LCP (Largest Contentful Paint)

Value8.4 s

2/100

25%

SI (Speed Index)

Value17.7 s

0/100

10%

TBT (Total Blocking Time)

Value470 ms

61/100

30%

CLS (Cumulative Layout Shift)

Value0.116

85/100

15%

TTI (Time to Interactive)

Value9.8 s

28/100

10%

Network Requests Diagram

xuetong.com

696 ms

www.xuetong.com

1197 ms

bootstrap.css

1282 ms

main.css

2457 ms

main-v2.css

2907 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 10% of them (3 requests) were addressed to the original Xuetong.com, 90% (28 requests) were made to Scb5a7gl-sb-qn.qiqiuyun.net. The less responsive or slowest element that took the longest time to load (5.5 sec) relates to the external source Scb5a7gl-sb-qn.qiqiuyun.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 89.4 kB (5%)

Content Size

1.9 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Xuetong.com main page is 1.9 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. 30% of websites need less resources to load. Javascripts take 872.3 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 23.7 kB

  • Original 29.3 kB
  • After minification 21.9 kB
  • After compression 5.7 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 7.4 kB, which is 25% 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 23.7 kB or 81% of the original size.

Image Optimization

-8%

Potential reduce by 55.3 kB

  • Original 667.8 kB
  • After minification 612.4 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. Xuetong images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 105 B

  • Original 872.3 kB
  • After minification 872.3 kB
  • After compression 872.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-3%

Potential reduce by 10.3 kB

  • Original 349.1 kB
  • After minification 338.7 kB
  • After compression 338.7 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. Xuetong.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 12 (44%)

Requests Now

27

After Optimization

15

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Xuetong. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

xuetong.com

xuetong.com

696 ms

www.xuetong.com

www.xuetong.com

1197 ms

bootstrap.css

bootstrap.css

1282 ms

main.css

main.css

2457 ms

main-v2.css

main-v2.css

2907 ms

main.css

main.css

2032 ms

1534168d87af746428.png

1534168d87af746428.png

2029 ms

block_picture_1554099031.jpg

block_picture_1554099031.jpg

3138 ms

lazyload_course.png

lazyload_course.png

2038 ms

lazyload_class.png

lazyload_class.png

2280 ms

translator.min.js

translator.min.js

2285 ms

zh_CN.js

zh_CN.js

2683 ms

base.js

base.js

3072 ms

common.js

common.js

5456 ms

main.js

main.js

3072 ms

main.js

main.js

3072 ms

echo-js.js

echo-js.js

3153 ms

index.js

index.js

3241 ms

jquery-validation.js

jquery-validation.js

3286 ms

index.js

index.js

3280 ms

100413d4a896124828.jpg

100413d4a896124828.jpg

3395 ms

2159219c12cf946212.jpeg

2159219c12cf946212.jpeg

3391 ms

stars.png

stars.png

496 ms

iconfont.woff

iconfont.woff

427 ms

es-icon.woff

es-icon.woff

686 ms

sample

sample

261 ms

165714aea4a1544211.png

165714aea4a1544211.png

629 ms

1557520cec30786836.png

1557520cec30786836.png

252 ms

165524cdf86e796390.png

165524cdf86e796390.png

551 ms

151942ea0550648697.png

151942ea0550648697.png

503 ms

073558ef18bb069649.png

073558ef18bb069649.png

1417 ms

Accessibility Review

xuetong.com accessibility score

56

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.

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

xuetong.com 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

xuetong.com SEO score

62

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

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 Xuetong.com 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 Xuetong.com 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

xuetong.com

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