Tools & Wizards About Us

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 60

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

atguigu.com

尚硅谷【官网】谷粉与老学员力挺的Java培训|嵌入式培训|大数据培训|前端培训|鸿蒙培训

Page Load Speed

69.5 sec in total

First Response

7.4 sec

Resources Loaded

61.2 sec

Page Rendered

878 ms

About Website

Click here to check amazing Atguigu content for China. Otherwise, check out these important facts you probably never knew about atguigu.com

尚硅谷专注IT教育培训,开设Java培训,嵌入式培训,大数据培训,HTML5+Web前端开发培训,鸿蒙开发培训等多门程序员编程培训课程,尚硅谷在北京、上海、武汉、深圳、西安、成都都设有基地,致力于培养中高级程序员,是业内口碑闻名的IT教育培训机构。

Visit atguigu.com

Key Findings

We analyzed Atguigu.com page load time and found that the first response time was 7.4 sec and then it took 62.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 7 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

atguigu.com performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

12/100

10%

LCP (Largest Contentful Paint)

Value18.9 s

0/100

25%

SI (Speed Index)

Value12.3 s

3/100

10%

TBT (Total Blocking Time)

Value1,400 ms

16/100

30%

CLS (Cumulative Layout Shift)

Value0.187

65/100

15%

TTI (Time to Interactive)

Value27.5 s

0/100

10%

Network Requests Diagram

atguigu.com

7431 ms

main.css

6937 ms

jquery-1.7.2.min.js

14989 ms

easySlider1.5.js

3073 ms

jquery.superslide.2.1.1.js

6513 ms

Our browser made a total of 101 requests to load all elements on the main page. We found that 89% of them (90 requests) were addressed to the original Atguigu.com, 2% (2 requests) were made to Www6.53kf.com and 1% (1 request) were made to S17.cnzz.com. The less responsive or slowest element that took the longest time to load (20.4 sec) belongs to the original domain Atguigu.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 288.5 kB (28%)

Content Size

1.0 MB

After Optimization

748.2 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Atguigu.com main page is 1.0 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. 25% of websites need less resources to load. Images take 868.1 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 83.1 kB

  • Original 99.3 kB
  • After minification 93.2 kB
  • After compression 16.3 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. 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 83.1 kB or 84% of the original size.

Image Optimization

-20%

Potential reduce by 174.7 kB

  • Original 868.1 kB
  • After minification 693.4 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. Obviously, Atguigu needs image optimization as it can save up to 174.7 kB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-44%

Potential reduce by 30.8 kB

  • Original 69.3 kB
  • After minification 64.5 kB
  • After compression 38.5 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 30.8 kB or 44% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (14%)

Requests Now

92

After Optimization

79

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Atguigu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

atguigu.com accessibility score

60

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

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

atguigu.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

atguigu.com 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 doesn't use 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 Atguigu.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 Atguigu.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

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