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learn.polyu.edu.hk screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

learn.polyu.edu.hk

Blackboard Learn

Page Load Speed

5.6 sec in total

First Response

899 ms

Resources Loaded

4.6 sec

Page Rendered

114 ms

learn.polyu.edu.hk screenshot

About Website

Welcome to learn.polyu.edu.hk homepage info - get ready to check Learn Polyu best content for China right away, or after learning these important things about learn.polyu.edu.hk

Visit learn.polyu.edu.hk

Key Findings

We analyzed Learn.polyu.edu.hk page load time and found that the first response time was 899 ms and then it took 4.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

learn.polyu.edu.hk performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.1 s

1/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value7.1 s

30/100

10%

TBT (Total Blocking Time)

Value130 ms

96/100

30%

CLS (Cumulative Layout Shift)

Value0.018

100/100

15%

TTI (Time to Interactive)

Value9.1 s

33/100

10%

Network Requests Diagram

learn.polyu.edu.hk

899 ms

364 ms

shared.css

233 ms

theme.css

458 ms

colorpalette.generated.modern.css

673 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that 90% of them (26 requests) were addressed to the original Learn.polyu.edu.hk, 3% (1 request) were made to Youtube.com and 3% (1 request) were made to S.ytimg.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Learn.polyu.edu.hk.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (80%)

Content Size

1.3 MB

After Optimization

255.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Learn.polyu.edu.hk main page is 1.3 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. 20% of websites need less resources to load. Javascripts take 797.9 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 48.2 kB

  • Original 61.7 kB
  • After minification 58.4 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. 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 48.2 kB or 78% of the original size.

Image Optimization

-15%

Potential reduce by 6.1 kB

  • Original 42.0 kB
  • After minification 35.9 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, Learn Polyu needs image optimization as it can save up to 6.1 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-84%

Potential reduce by 666.3 kB

  • Original 797.9 kB
  • After minification 518.4 kB
  • After compression 131.6 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 666.3 kB or 84% of the original size.

CSS Optimization

-81%

Potential reduce by 305.9 kB

  • Original 380.0 kB
  • After minification 354.5 kB
  • After compression 74.1 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. Learn.polyu.edu.hk needs all CSS files to be minified and compressed as it can save up to 305.9 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (63%)

Requests Now

27

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Learn Polyu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

learn.polyu.edu.hk

learn.polyu.edu.hk

899 ms

364 ms

shared.css

shared.css

233 ms

theme.css

theme.css

458 ms

colorpalette.generated.modern.css

colorpalette.generated.modern.css

673 ms

i18n.js

i18n.js

667 ms

cdn.js

cdn.js

667 ms

34205C7C6951B6CBEB070FA6C96689C2.js

34205C7C6951B6CBEB070FA6C96689C2.js

1555 ms

UserDataDWRFacade.js

UserDataDWRFacade.js

672 ms

MashupDWRFacade.js

MashupDWRFacade.js

679 ms

28C5339EE01B493DBF0F3B35075BA38B.js

28C5339EE01B493DBF0F3B35075BA38B.js

891 ms

BE6C78620EF8B12781E212F3064DAEBA.js

BE6C78620EF8B12781E212F3064DAEBA.js

1118 ms

polyu_check_oct14_mini.js

polyu_check_oct14_mini.js

910 ms

icon-core.css

icon-core.css

663 ms

icon-listing.css

icon-listing.css

673 ms

theme1.css

theme1.css

1106 ms

theme2.css

theme2.css

886 ms

iframe_api

iframe_api

81 ms

spacer.gif

spacer.gif

249 ms

logo_polyu.jpg

logo_polyu.jpg

245 ms

logo_learn.jpg

logo_learn.jpg

249 ms

login_dotline.jpg

login_dotline.jpg

244 ms

tb_head_bg.jpg

tb_head_bg.jpg

242 ms

tb_head_title.jpg

tb_head_title.jpg

250 ms

login_gtick.jpg

login_gtick.jpg

470 ms

login_icon_bulet1.jpg

login_icon_bulet1.jpg

476 ms

www-widgetapi.js

www-widgetapi.js

54 ms

print.css

print.css

227 ms

nr-852.min.js

nr-852.min.js

95 ms

Accessibility Review

learn.polyu.edu.hk accessibility score

94

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

learn.polyu.edu.hk 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

SEO Factors

learn.polyu.edu.hk SEO score

83

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

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 Learn.polyu.edu.hk 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 Learn.polyu.edu.hk 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

learn.polyu.edu.hk

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