Tools & Wizards About Us
islux.lu screenshot

Report Summary

  • 2

    Performance

    Renders faster than
    19% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 89% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 84

    SEO

    Google-friendlier than
    53% of websites

islux.lu

ISL | International School of Luxembourg: Homepage

Page Load Speed

1.3 sec in total

First Response

227 ms

Resources Loaded

983 ms

Page Rendered

92 ms

islux.lu screenshot

About Website

Visit islux.lu now to see the best up-to-date ISL Ux content for Canada and also check out these interesting facts you probably never knew about islux.lu

Welcome to the International School of Luxembourg, a thriving Preschool - Grade 12 international School for boys and girls aged 3 - 18 years

Visit islux.lu

Key Findings

We analyzed Islux.lu page load time and found that the first response time was 227 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

islux.lu performance score

2

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

19/100

10%

LCP (Largest Contentful Paint)

Value25.6 s

0/100

25%

SI (Speed Index)

Value17.6 s

0/100

10%

TBT (Total Blocking Time)

Value10,520 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value1

2/100

15%

TTI (Time to Interactive)

Value24.5 s

0/100

10%

Network Requests Diagram

islux.lu

227 ms

www.islux.lu

388 ms

styles.cfm

71 ms

ss.css

28 ms

jquery.min.js

23 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 47% of them (16 requests) were addressed to the original Islux.lu, 24% (8 requests) were made to Newjs.finalsite.com and 9% (3 requests) were made to Newcss.finalsite.com. The less responsive or slowest element that took the longest time to load (388 ms) belongs to the original domain Islux.lu.

Page Optimization Overview & Recommendations

Page size can be reduced by 402.9 kB (65%)

Content Size

621.9 kB

After Optimization

219.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Islux.lu main page is 621.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Javascripts take 442.5 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 24.7 kB

  • Original 32.8 kB
  • After minification 30.6 kB
  • After compression 8.1 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 24.7 kB or 75% of the original size.

Image Optimization

-8%

Potential reduce by 5.8 kB

  • Original 70.6 kB
  • After minification 64.8 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. ISL Ux images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 308.2 kB

  • Original 442.5 kB
  • After minification 404.0 kB
  • After compression 134.3 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 308.2 kB or 70% of the original size.

CSS Optimization

-84%

Potential reduce by 64.2 kB

  • Original 76.1 kB
  • After minification 57.4 kB
  • After compression 12.0 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. Islux.lu needs all CSS files to be minified and compressed as it can save up to 64.2 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (47%)

Requests Now

32

After Optimization

17

  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ISL Ux. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

islux.lu

islux.lu

227 ms

www.islux.lu

www.islux.lu

388 ms

styles.cfm

styles.cfm

71 ms

ss.css

ss.css

28 ms

jquery.min.js

jquery.min.js

23 ms

fs_global.js

fs_global.js

20 ms

jquery.fsBreakly.js

jquery.fsBreakly.js

20 ms

blog.js

blog.js

20 ms

news.css

news.css

24 ms

jquery.ui.1.8rc3.css

jquery.ui.1.8rc3.css

18 ms

main.css

main.css

70 ms

global_vars.js

global_vars.js

76 ms

fsButtons.min.js

fsButtons.min.js

67 ms

fsSlider.min.js

fsSlider.min.js

109 ms

agj7tum.js

agj7tum.js

163 ms

jquery.ui.min.js

jquery.ui.min.js

5 ms

flash_headers.js

flash_headers.js

64 ms

ga.js

ga.js

88 ms

ISLCTS.png

ISLCTS.png

52 ms

699.medium.jpg

699.medium.jpg

109 ms

poweredBy.svg

poweredBy.svg

40 ms

submit.png

submit.png

49 ms

divider.gif

divider.gif

43 ms

arrow-up.png

arrow-up.png

44 ms

twitter-icon.png

twitter-icon.png

47 ms

facebook-icon.png

facebook-icon.png

45 ms

671.medium.jpg

671.medium.jpg

139 ms

673.medium.jpg

673.medium.jpg

107 ms

ui-bg_flat_75_ffffff_40x100.png

ui-bg_flat_75_ffffff_40x100.png

16 ms

ui-icons_222222_256x240.png

ui-icons_222222_256x240.png

19 ms

news-previous.png

news-previous.png

39 ms

news-next.png

news-next.png

62 ms

__utm.gif

__utm.gif

12 ms

nr-768.min.js

nr-768.min.js

45 ms

Accessibility Review

islux.lu accessibility score

96

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

Links do not have a discernible name

Best Practices

islux.lu best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

islux.lu SEO score

84

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

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Islux.lu 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 Islux.lu main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

islux.lu

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