4.4 sec in total
426 ms
3.3 sec
598 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 426 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 65% of websites can load faster.
osur.univ-rennes1.fr performance score
name
value
score
weighting
Value3.6 s
32/100
10%
Value9.7 s
0/100
25%
Value6.8 s
34/100
10%
Value180 ms
91/100
30%
Value0.076
95/100
15%
Value10.3 s
25/100
10%
426 ms
353 ms
1327 ms
704 ms
170 ms
Our browser made a total of 56 requests to load all elements on the main page. We found that 4% of them (2 requests) were addressed to the original Osur.univ-rennes1.fr, 82% (46 requests) were made to Osur.univ-rennes.fr and 5% (3 requests) were made to Cibul.s3.amazonaws.com. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source Osur.univ-rennes.fr.
Page size can be reduced by 187.9 kB (7%)
2.7 MB
2.5 MB
In fact, the total size of Osur.univ-rennes1.fr main page is 2.7 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. 50% of websites need less resources to load. Images take 2.4 MB which makes up the majority of the site volume.
Potential reduce by 70.5 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 14.1 kB, which is 16% 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 70.5 kB or 82% of the original size.
Potential reduce by 117.3 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 89 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 42 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 9 (22%)
41
32
The browser has sent 41 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 7 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
426 ms
osur.univ-rennes1.fr
353 ms
osur.univ-rennes.fr
1327 ms
matomo.js
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css_QXzNqWQwE50ivVG6Dv-_CaPyqj6ekUGbNDzNltRFPpk.css
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css_i7tTq3AibrtGTXHHDcp3rVN0kkSDVsQsT8uG0jHeUkw.css
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css_U3gUM2AQGe682w1kFvIjqWK2m3vdiiq53Z74l76pRNA.css
265 ms
logo_OSUR_simple-transparent_twitter1-removebg-preview.png
690 ms
b76b43c930cf4dfca8c4dca1e0506bcf.base.image.jpg
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page.js
29 ms
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js_JPICiHY253DAgpA4zMF630YiXL5-1sXpkAQpro63lBc.js
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bf29a53ea6404dd59553851b3d380046.base.image.jpg
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Recherche2.jpg
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LOGO_CNRS_2019_RVB.png
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656 ms
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590 ms
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597 ms
Roboto-Light.woff
611 ms
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611 ms
Roboto-Bold.woff
673 ms
Unirennes-Light.woff
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Unirennes-Regular.woff
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matomo.php
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88 ms
osur.univ-rennes1.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.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
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
Page is blocked from indexing
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: