4.2 sec in total
298 ms
3.7 sec
124 ms
Welcome to ens-lyon.fr homepage info - get ready to check Ens Lyon best content for France right away, or after learning these important things about ens-lyon.fr
S’appuyant sur la tradition française d’excellence des Écoles normales supérieures, l’ENS de Lyon forme les cadres de l’enseignement supérieur et de la recherche en France et dans le monde. Grande é...
Visit ens-lyon.frWe analyzed Ens-lyon.fr page load time and found that the first response time was 298 ms and then it took 3.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
ens-lyon.fr performance score
name
value
score
weighting
Value6.1 s
3/100
10%
Value15.1 s
0/100
25%
Value11.3 s
5/100
10%
Value1,210 ms
20/100
30%
Value0.061
97/100
15%
Value15.4 s
7/100
10%
298 ms
295 ms
1187 ms
213 ms
390 ms
Our browser made a total of 66 requests to load all elements on the main page. We found that 97% of them (64 requests) were addressed to the original Ens-lyon.fr, 2% (1 request) were made to Ens-lyon.eu and 2% (1 request) were made to Pw-mark.ens-lyon.fr. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Ens-lyon.fr.
Page size can be reduced by 443.2 kB (33%)
1.4 MB
919.5 kB
In fact, the total size of Ens-lyon.fr main page is 1.4 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. 30% of websites need less resources to load. Images take 859.6 kB which makes up the majority of the site volume.
Potential reduce by 32.9 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 32.9 kB or 77% of the original size.
Potential reduce by 19.1 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. Ens Lyon images are well optimized though.
Potential reduce by 198.3 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 198.3 kB or 81% of the original size.
Potential reduce by 192.9 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. Ens-lyon.fr needs all CSS files to be minified and compressed as it can save up to 192.9 kB or 89% of the original size.
Number of requests can be reduced by 41 (65%)
63
22
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ens Lyon. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
ens-lyon.fr
298 ms
www.ens-lyon.eu
295 ms
ecole-normale-superieure-de-lyon-accueil-77247.kjsp
1187 ms
screenstyles.css
213 ms
ens-lyon.css
390 ms
page_41589846.css
197 ms
scripts.js
604 ms
fckeditor.js
199 ms
jquery.browser.min.js
293 ms
jquery.easing.1.3.js
297 ms
camera.js
528 ms
camera.css
584 ms
jquery.vticker.min.js
394 ms
drapeau-EN.gif
97 ms
drapeau-FR.gif
100 ms
drapeau-IT.gif
100 ms
question.png
101 ms
imagette-defaut.jpg
294 ms
bg_menu-haut-gris.gif
192 ms
pict-twitter.png
196 ms
pict-facebook.png
196 ms
logo_ens_vide.gif
196 ms
logo_ens.gif
287 ms
logo_site_vide.gif
292 ms
logo_ENSdeLyon.gif
294 ms
logo_idex.jpg
295 ms
logo_univ-lyon.jpg
383 ms
logo_universite_vide.gif
175 ms
logo_chels.png
272 ms
bg_rechercher.gif
177 ms
bouton_valider-2.gif
177 ms
valider_vide.gif
266 ms
puce-blanche.gif
272 ms
cache_blanc.gif
273 ms
fleche.gif
275 ms
4ltrophy_1455781215421-jpg
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tourgueniev-25-02-au-14-04_1456126279781-jpg
738 ms
bandeau-ta-2016-derniers-jours_1456147355829-jpg
659 ms
venice-sunset-15-fev-16_1455089762811-jpg
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classement-the-5e_1453902653751-jpg
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v_tita_1455272409965-jpg
259 ms
v_atelier-humanites-numeriques_1455532182711-jpg
510 ms
v_souris-moncorge-contour_1455699000629-jpg
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arezki-boudaoud-norvege-2014_1456411816897-jpg
897 ms
v_ihrim_1454486178507-jpg
643 ms
joriss-contour_1456335234894-jpg
875 ms
L_vous-etes-defaut.gif
719 ms
L_acces-directs-defaut.gif
740 ms
ens1.js
738 ms
L_annuaire-defaut.gif
759 ms
bg-rechercher.jpg
759 ms
valider-portail.gif
832 ms
L_bienvenue-defaut.gif
856 ms
com.univ.collaboratif.utils.LectureFichiergw
956 ms
haut.gif
867 ms
haut-page_vide.gif
892 ms
frise-defaut.jpg
913 ms
webmestre.gif
925 ms
accessibilite.gif
949 ms
mentions.gif
961 ms
plan.gif
985 ms
ens-pw.js
680 ms
caroussel_precedent.png
257 ms
caroussel_suivant.png
266 ms
printstyles.css
102 ms
impression.css
100 ms
ens-lyon.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.
ens-lyon.fr best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
ens-lyon.fr SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
FR
FR
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ens-lyon.fr can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and it matches the claimed language. Our system also found out that Ens-lyon.fr 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.
ens-lyon.fr
Open Graph description is not detected on the main page of Ens Lyon. 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: