3.6 sec in total
588 ms
2.4 sec
573 ms
Visit astro.ulb.ac.be now to see the best up-to-date Astro Ulb content for Belgium and also check out these interesting facts you probably never knew about astro.ulb.ac.be
Visit astro.ulb.ac.beWe analyzed Astro.ulb.ac.be page load time and found that the first response time was 588 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
astro.ulb.ac.be performance score
name
value
score
weighting
Value2.6 s
62/100
10%
Value2.6 s
87/100
25%
Value4.1 s
79/100
10%
Value10 ms
100/100
30%
Value0.007
100/100
15%
Value2.7 s
97/100
10%
588 ms
514 ms
33 ms
592 ms
501 ms
Our browser made a total of 20 requests to load all elements on the main page. We found that 95% of them (19 requests) were addressed to the original Astro.ulb.ac.be, 5% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Astro.ulb.ac.be.
Page size can be reduced by 14.1 kB (76%)
18.6 kB
4.5 kB
In fact, the total size of Astro.ulb.ac.be main page is 18.6 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. 25% of websites need less resources to load. HTML takes 18.6 kB which makes up the majority of the site volume.
Potential reduce by 14.1 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. This page needs HTML code to be minified as it can gain 2.1 kB, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 14.1 kB or 76% of the original size.
Number of requests can be reduced by 3 (16%)
19
16
The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Astro Ulb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.
astro.ulb.ac.be
588 ms
LaTeXMathML.js
514 ms
jquery.min.js
33 ms
galleria-1.2.5.min.js
592 ms
not2simple.css
501 ms
galleria.classic.min.js
84 ms
Box-Top-Icc.jpg
248 ms
ULBsciences_droit.png
86 ms
Box-Middle.jpg
148 ms
en.png
165 ms
fr.png
166 ms
external.png
169 ms
IMG_0512.JPG
1069 ms
thermometre.jpg
1218 ms
Mira_ALMA-LD.jpg
573 ms
mira_galex_chandra_captions3.gif
732 ms
cover_Mira.gif
574 ms
Box-Bottom.jpg
329 ms
galleria.classic.css
343 ms
galleria.classic.css
426 ms
astro.ulb.ac.be accessibility score
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
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
Image elements do not have [alt] attributes
Links do not have a discernible name
astro.ulb.ac.be best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
astro.ulb.ac.be SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
N/A
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Astro.ulb.ac.be can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Astro.ulb.ac.be 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.
astro.ulb.ac.be
Open Graph description is not detected on the main page of Astro Ulb. 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: