Tools & Wizards About Us
youdaxue.com screenshot

Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

youdaxue.com

Learn the Latest Tech Skills; Advance Your Career | Udacity

Page Load Speed

114.7 sec in total

First Response

72 ms

Resources Loaded

6.6 sec

Page Rendered

108 sec

youdaxue.com screenshot

About Website

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

Learn online and advance your career with courses in programming, data science, artificial intelligence, digital marketing, and more. Gain in-demand technical skills. Join today!

Visit youdaxue.com

Key Findings

We analyzed Youdaxue.com page load time and found that the first response time was 72 ms and then it took 114.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

youdaxue.com performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

17/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

9/100

25%

SI (Speed Index)

Value13.0 s

2/100

10%

TBT (Total Blocking Time)

Value23,470 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.124

83/100

15%

TTI (Time to Interactive)

Value46.1 s

0/100

10%

Network Requests Diagram

www.udacity.com

72 ms

www.udacity.com

674 ms

7f2523fe9e19d89e.css

138 ms

76c8ccc82bdb1369.css

223 ms

polyfills-78c92fac7aa8fdd8.js

419 ms

Our browser made a total of 108 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Youdaxue.com, 29% (31 requests) were made to Udacity.com and 9% (10 requests) were made to Uds-assets.udacity.com. The less responsive or slowest element that took the longest time to load (3.9 sec) relates to the external source Cdn.sanity.io.

Page Optimization Overview & Recommendations

Page size can be reduced by 140.0 MB (42%)

Content Size

331.2 MB

After Optimization

191.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Youdaxue.com main page is 331.2 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. Only a small number of websites need less resources to load. Images take 329.5 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 1.4 MB

  • Original 1.7 MB
  • After minification 1.7 MB
  • After compression 358.3 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 1.4 MB or 79% of the original size.

Image Optimization

-42%

Potential reduce by 138.6 MB

  • Original 329.5 MB
  • After minification 190.8 MB

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, Youdaxue needs image optimization as it can save up to 138.6 MB or 42% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 54.2 kB
  • After minification 54.2 kB
  • After compression 54.2 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

-2%

Potential reduce by 71 B

  • Original 3.4 kB
  • After minification 3.4 kB
  • After compression 3.4 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. Youdaxue.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 18 (17%)

Requests Now

106

After Optimization

88

  • Images
  • JavaScript
  • CSS

The browser has sent 106 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Youdaxue. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

www.udacity.com

www.udacity.com

72 ms

www.udacity.com

www.udacity.com

674 ms

7f2523fe9e19d89e.css

7f2523fe9e19d89e.css

138 ms

76c8ccc82bdb1369.css

76c8ccc82bdb1369.css

223 ms

polyfills-78c92fac7aa8fdd8.js

polyfills-78c92fac7aa8fdd8.js

419 ms

airgap.js

airgap.js

473 ms

webpack-68b42e1e0eeae497.js

webpack-68b42e1e0eeae497.js

472 ms

framework-511a18a757f331df.js

framework-511a18a757f331df.js

473 ms

main-21ca4d967e834de1.js

main-21ca4d967e834de1.js

472 ms

_app-28c290f90420b7c8.js

_app-28c290f90420b7c8.js

600 ms

6103-b8a5acbf2ba03cbf.js

6103-b8a5acbf2ba03cbf.js

577 ms

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2714-a3c7e9ec0e845ffe.js

577 ms

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591 ms

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8996-537b43c63829ade5.js

591 ms

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7334-04ccdcb4a9ea2a88.js

590 ms

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6334-213abc6b45634926.js

630 ms

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9286-cea6276f8078dfe0.js

663 ms

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5504-a09a74e0cdf9709e.js

663 ms

2034-6afb5928306b9c63.js

2034-6afb5928306b9c63.js

690 ms

1002-0e80f8ccbdcd38aa.js

1002-0e80f8ccbdcd38aa.js

662 ms

variant_c-a345a293f551c5c0.js

variant_c-a345a293f551c5c0.js

691 ms

_buildManifest.js

_buildManifest.js

691 ms

_ssgManifest.js

_ssgManifest.js

716 ms

school-data-sci-one.svg

school-data-sci-one.svg

621 ms

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902 ms

image

image

631 ms

image

image

629 ms

image

image

639 ms

image

image

633 ms

udacity-accenture-logo.svg

udacity-accenture-logo.svg

611 ms

facebook.svg

facebook.svg

673 ms

twitter.svg

twitter.svg

662 ms

linkedin.svg

linkedin.svg

703 ms

instagram.svg

instagram.svg

660 ms

school-programming-one.svg

school-programming-one.svg

585 ms

school-ai-one.svg

school-ai-one.svg

605 ms

school-business-one.svg

school-business-one.svg

612 ms

school-autonomous-sys-one.svg

school-autonomous-sys-one.svg

635 ms

school-product-mgt-one.svg

school-product-mgt-one.svg

633 ms

school-cloud-computing-one.svg

school-cloud-computing-one.svg

625 ms

avatar-one.svg

avatar-one.svg

630 ms

avatar-three.svg

avatar-three.svg

672 ms

avatar-two.svg

avatar-two.svg

663 ms

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866 ms

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677 ms

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648 ms

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665 ms

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653 ms

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997 ms

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696 ms

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909 ms

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703 ms

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715 ms

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728 ms

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853 ms

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839 ms

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915 ms

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931 ms

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921 ms

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1360 ms

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950 ms

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1280 ms

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1548 ms

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1331 ms

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1055 ms

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1067 ms

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1300 ms

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1646 ms

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1505 ms

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2078 ms

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1805 ms

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2130 ms

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1997 ms

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2121 ms

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2357 ms

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2664 ms

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2716 ms

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2656 ms

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1851 ms

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2085 ms

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2419 ms

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2454 ms

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2504 ms

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2679 ms

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2510 ms

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2669 ms

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3038 ms

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2682 ms

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2969 ms

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2815 ms

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3061 ms

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3365 ms

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3304 ms

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3493 ms

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3299 ms

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3704 ms

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3534 ms

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3895 ms

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3728 ms

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3890 ms

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3915 ms

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3873 ms

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3420 ms

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3558 ms

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3638 ms

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3371 ms

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3303 ms

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3426 ms

Accessibility Review

youdaxue.com accessibility score

94

Accessibility Issues

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

youdaxue.com 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

youdaxue.com SEO score

86

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

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Youdaxue.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Youdaxue.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

youdaxue.com

Open Graph data is detected on the main page of Youdaxue. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: