Access list.lu. Home | Luxembourg Institute of Science and Technology

name

value

score

weighting

FCP (First Contentful Paint)

Value9.5 s

0/100

10%

LCP (Largest Contentful Paint)

Value14.1 s

0/100

25%

SI (Speed Index)

Value11.5 s

5/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.346

32/100

15%

TTI (Time to Interactive)

Value13.9 s

10/100

10%

list.lu

361 ms

08ebfd912dab200071d4ef518d2e9d3aa676ad8326c7766e16a360790878d043de68813e0b982961

346 ms

08ebfd912dab200071d4ef518d2e9d3aa676ad8326c7766e16a360790878d043de68813e0b982961

435 ms

Our browser made a total of 3 requests to load all elements on the main page. We found that all of those requests were addressed to List.lu and no external sources were called. The less responsive or slowest element that took the longest time to load (435 ms) belongs to the original domain List.lu.

Content Size

6.3 MB

After Optimization

6.0 MB

In fact, the total size of List.lu main page is 6.3 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. Only 5% of websites need less resources to load. Images take 6.0 MB which makes up the majority of the site volume.

HTML Optimization

-56%

Potential reduce by 3.3 kB

Original 6.0 kB
After minification 5.9 kB
After compression 2.6 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 3.3 kB or 56% of the original size.

Image Optimization

-6%

Potential reduce by 344.5 kB

Original 6.0 MB
After minification 5.7 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. List images are well optimized though.

JavaScript Optimization

-5%

Potential reduce by 12.7 kB

Original 246.8 kB
After minification 246.3 kB
After compression 234.0 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

-14%

Potential reduce by 5.3 kB

Original 38.2 kB
After minification 38.2 kB
After compression 32.9 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. List.lu needs all CSS files to be minified and compressed as it can save up to 5.3 kB or 14% of the original size.

Requests Now

After Optimization

The browser has sent 2 CSS, Javascripts, AJAX and image requests in order to completely render the main page of List. According to our analytics all requests are already optimized.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise List.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 List.lu 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

list.lu

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