2.5 sec in total
412 ms
2 sec
157 ms
Visit dec.ens.fr now to see the best up-to-date DEC Ens content for France and also check out these interesting facts you probably never knew about dec.ens.fr
Les sciences cognitives s'intéressent aux grandes fonctions mentales comme la perception, la mémoire, le raisonnement, le langage, les émotions, la motricité, la prise de décision.
Visit dec.ens.frWe analyzed Dec.ens.fr page load time and found that the first response time was 412 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
dec.ens.fr performance score
name
value
score
weighting
Value14.0 s
0/100
10%
Value28.3 s
0/100
25%
Value29.0 s
0/100
10%
Value35,770 ms
0/100
30%
Value0.026
100/100
15%
Value58.8 s
0/100
10%
412 ms
83 ms
32 ms
162 ms
82 ms
Our browser made a total of 17 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Dec.ens.fr, 6% (1 request) were made to Ajax.googleapis.com and 6% (1 request) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (802 ms) relates to the external source Cognition.ens.fr.
Page size can be reduced by 93.7 kB (10%)
939.0 kB
845.3 kB
In fact, the total size of Dec.ens.fr main page is 939.0 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. Images take 818.3 kB which makes up the majority of the site volume.
Potential reduce by 7.3 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. This page needs HTML code to be minified as it can gain 2.1 kB, which is 21% 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 7.3 kB or 72% of the original size.
Potential reduce by 12.7 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. DEC Ens images are well optimized though.
Potential reduce by 61.9 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 61.9 kB or 64% of the original size.
Potential reduce by 11.8 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. Dec.ens.fr needs all CSS files to be minified and compressed as it can save up to 11.8 kB or 83% of the original size.
We found no issues to fix!
16
16
The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of DEC Ens. According to our analytics all requests are already optimized.
www.cognition.ens.fr
412 ms
stylesVersionFinale.css
83 ms
jquery.min.js
32 ms
responsiveslides.min.js
162 ms
reset.css
82 ms
widgets.js
36 ms
logoEns.png
82 ms
DEC.png
637 ms
BJA.jpg
399 ms
BDFSC.jpg
480 ms
BIAEDEC.jpg
440 ms
medaille_bronze_2016.jpg
161 ms
Enfant.png
802 ms
ENS_logoDEC.png
478 ms
WensImage.png
558 ms
twitter_20x20.png
520 ms
logos.png
558 ms
dec.ens.fr accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
dec.ens.fr 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
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
dec.ens.fr SEO score
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
Document uses legible font sizes
Tap targets are not sized appropriately
EN
FR
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dec.ens.fr can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed French language. Our system also found out that Dec.ens.fr 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.
dec.ens.fr
Open Graph description is not detected on the main page of DEC Ens. 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: