3.8 sec in total
438 ms
2.8 sec
600 ms
Visit osur.univ-rennes1.fr now to see the best up-to-date OSUR Univ Rennes 1 content for France and also check out these interesting facts you probably never knew about osur.univ-rennes1.fr
L'Observatoire des sciences de l'univers de Rennes (OSUR) est une unité d'appui et de recherche soutenue par l'Université de Rennes 1, l'Université Rennes 2, le CNRS, l'I...
Visit osur.univ-rennes1.frWe analyzed Osur.univ-rennes1.fr page load time and found that the first response time was 438 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
osur.univ-rennes1.fr performance score
name
value
score
weighting
Value3.1 s
47/100
10%
Value15.2 s
0/100
25%
Value7.3 s
29/100
10%
Value2,800 ms
3/100
30%
Value0.166
71/100
15%
Value7.4 s
48/100
10%
438 ms
1037 ms
784 ms
186 ms
450 ms
Our browser made a total of 44 requests to load all elements on the main page. We found that 82% of them (36 requests) were addressed to the original Osur.univ-rennes1.fr, 7% (3 requests) were made to Cibul.s3.amazonaws.com and 7% (3 requests) were made to Static.addtoany.com. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Osur.univ-rennes1.fr.
Page size can be reduced by 220.9 kB (9%)
2.4 MB
2.2 MB
In fact, the total size of Osur.univ-rennes1.fr main page is 2.4 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. 45% of websites need less resources to load. Images take 2.2 MB which makes up the majority of the site volume.
Potential reduce by 96.8 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 20.2 kB, which is 17% 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 96.8 kB or 80% of the original size.
Potential reduce by 123.5 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. OSUR Univ Rennes 1 images are well optimized though.
Potential reduce by 0 B
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.
Potential reduce by 607 B
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. Osur.univ-rennes1.fr has all CSS files already compressed.
Number of requests can be reduced by 7 (21%)
34
27
The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of OSUR Univ Rennes 1. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
osur.univ-rennes1.fr
438 ms
osur.univ-rennes1.fr
1037 ms
matomo.js
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css_nu0y6Yvb9CIm3vGdzNKN6HEqo_GeSB3vS5TjOru5Ym8.css
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css_gKufwAHSXYiML8Votzrv3dS-obDSiomv2VLzRrjPkwc.css
266 ms
logo_OSUR_simple-transparent_twitter1-removebg-preview.png
764 ms
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osur.univ-rennes1.fr accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
ARIA input fields do not have accessible names
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
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
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
osur.univ-rennes1.fr best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
osur.univ-rennes1.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
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Osur.univ-rennes1.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 Osur.univ-rennes1.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.
osur.univ-rennes1.fr
Open Graph description is not detected on the main page of OSUR Univ Rennes 1. 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: