4.4 sec in total
161 ms
3.9 sec
286 ms
Welcome to rosetta-cnes.fr homepage info - get ready to check Rosetta Cnes best content right away, or after learning these important things about rosetta-cnes.fr
Visit rosetta-cnes.frWe analyzed Rosetta-cnes.fr page load time and found that the first response time was 161 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
rosetta-cnes.fr performance score
name
value
score
weighting
Value4.9 s
11/100
10%
Value7.7 s
3/100
25%
Value8.7 s
16/100
10%
Value360 ms
72/100
30%
Value0.061
97/100
15%
Value8.4 s
38/100
10%
161 ms
338 ms
265 ms
253 ms
167 ms
Our browser made a total of 77 requests to load all elements on the main page. We found that 40% of them (31 requests) were addressed to the original Rosetta-cnes.fr, 13% (10 requests) were made to Img.scoop.it and 13% (10 requests) were made to Scoop.it. The less responsive or slowest element that took the longest time to load (1.6 sec) relates to the external source Cnes.fr.
Page size can be reduced by 323.0 kB (31%)
1.0 MB
709.8 kB
In fact, the total size of Rosetta-cnes.fr main page is 1.0 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. 55% of websites need less resources to load. Images take 607.9 kB which makes up the majority of the site volume.
Potential reduce by 21.9 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 21.9 kB or 70% of the original size.
Potential reduce by 9.8 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. Rosetta Cnes images are well optimized though.
Potential reduce by 143.1 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 143.1 kB or 66% of the original size.
Potential reduce by 148.2 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. Rosetta-cnes.fr needs all CSS files to be minified and compressed as it can save up to 148.2 kB or 84% of the original size.
Number of requests can be reduced by 24 (32%)
74
50
The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rosetta Cnes. 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 4 to 1 for CSS and as a result speed up the page load time.
161 ms
bootstrap.css
338 ms
bootstrap-responsive.css
265 ms
home.css
253 ms
jquery.reject.css
167 ms
rosetta.min.js
566 ms
twitter-fetcher.js
250 ms
jquery.reject.min.js
327 ms
update.js
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index-background-c.jpg
971 ms
close.png
82 ms
loading.gif
182 ms
prev.png
85 ms
next.png
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Blog_Visit.png
90 ms
logoRosetta.png
477 ms
actu-background.png
179 ms
pictocnes.png
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pictotwitter_gris.png
185 ms
logocnes.png
264 ms
mission.png
422 ms
philae.png
373 ms
sonde.png
273 ms
resultats.png
500 ms
comete.png
371 ms
outils.png
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stainless-lightregular-webfont.woff
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stainless-regularitalic-webfont.woff
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stainless-boldregular-webfont.woff
607 ms
stainless-regularregular-webfont.woff
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analytics.js
30 ms
countdown.xml
252 ms
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load
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api.php
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proxy.jpg
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accueil_site_instit
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rosetta-cnes.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.
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
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
rosetta-cnes.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
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
rosetta-cnes.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
FR
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rosetta-cnes.fr can be misinterpreted by Google and other search engines. Our service has detected that French 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 Rosetta-cnes.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.
rosetta-cnes.fr
Open Graph description is not detected on the main page of Rosetta Cnes. 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: