Tools & Wizards About Us
osur.univ-rennes1.fr screenshot

Report Summary

  • 51

    Performance

    Renders faster than
    69% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

osur.univ-rennes1.fr

Accueil | OSUR

Page Load Speed

4.4 sec in total

First Response

426 ms

Resources Loaded

3.3 sec

Page Rendered

598 ms

osur.univ-rennes1.fr screenshot

About Website

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.fr

Key Findings

We 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.

Performance Metrics

osur.univ-rennes1.fr performance score

51

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

32/100

10%

LCP (Largest Contentful Paint)

Value9.7 s

0/100

25%

SI (Speed Index)

Value6.8 s

34/100

10%

TBT (Total Blocking Time)

Value180 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.076

95/100

15%

TTI (Time to Interactive)

Value10.3 s

25/100

10%

Network Requests Diagram

osur.univ-rennes1.fr

426 ms

osur.univ-rennes1.fr

353 ms

osur.univ-rennes.fr

1327 ms

matomo.js

704 ms

css_QXzNqWQwE50ivVG6Dv-_CaPyqj6ekUGbNDzNltRFPpk.css

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 Optimization Overview & Recommendations

Page size can be reduced by 187.9 kB (7%)

Content Size

2.7 MB

After Optimization

2.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

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.

HTML Optimization

-82%

Potential reduce by 70.5 kB

  • Original 85.8 kB
  • After minification 71.7 kB
  • After compression 15.3 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 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.

Image Optimization

-5%

Potential reduce by 117.3 kB

  • Original 2.4 MB
  • After minification 2.2 MB

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.

JavaScript Optimization

-0%

Potential reduce by 91 B

  • Original 134.3 kB
  • After minification 134.3 kB
  • After compression 134.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 42 B

  • Original 97.3 kB
  • After minification 97.3 kB
  • After compression 97.3 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. Osur.univ-rennes1.fr has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (22%)

Requests Now

41

After Optimization

32

  • AJAX
  • Images
  • JavaScript
  • CSS

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.

Network Requests Diagram

osur.univ-rennes1.fr

osur.univ-rennes1.fr

426 ms

osur.univ-rennes1.fr

osur.univ-rennes1.fr

353 ms

osur.univ-rennes.fr

osur.univ-rennes.fr

1327 ms

matomo.js

matomo.js

704 ms

css_QXzNqWQwE50ivVG6Dv-_CaPyqj6ekUGbNDzNltRFPpk.css

css_QXzNqWQwE50ivVG6Dv-_CaPyqj6ekUGbNDzNltRFPpk.css

170 ms

css_i7tTq3AibrtGTXHHDcp3rVN0kkSDVsQsT8uG0jHeUkw.css

css_i7tTq3AibrtGTXHHDcp3rVN0kkSDVsQsT8uG0jHeUkw.css

343 ms

css_U3gUM2AQGe682w1kFvIjqWK2m3vdiiq53Z74l76pRNA.css

css_U3gUM2AQGe682w1kFvIjqWK2m3vdiiq53Z74l76pRNA.css

265 ms

logo_OSUR_simple-transparent_twitter1-removebg-preview.png

logo_OSUR_simple-transparent_twitter1-removebg-preview.png

690 ms

b76b43c930cf4dfca8c4dca1e0506bcf.base.image.jpg

b76b43c930cf4dfca8c4dca1e0506bcf.base.image.jpg

366 ms

AAA3_.png

AAA3_.png

610 ms

2029c26a05_50150963_fotolia-270605917-subscription-monthly-m_1.jpg

2029c26a05_50150963_fotolia-270605917-subscription-monthly-m_1.jpg

368 ms

AAA1.png

AAA1.png

689 ms

IMG_2641.jpg

IMG_2641.jpg

438 ms

UnivRenn_taxe-apprentissage-2024.jpg

UnivRenn_taxe-apprentissage-2024.jpg

432 ms

Christoff-Anderman_NatureWater_juil24-fig7-drupal.jpg

Christoff-Anderman_NatureWater_juil24-fig7-drupal.jpg

626 ms

Alexandrine-Pannard_.jpg

Alexandrine-Pannard_.jpg

603 ms

js_ZH1AwiuHG4b7X7fRxfZpP38q8hgJXIAi_wDdi4jJnJA.js

js_ZH1AwiuHG4b7X7fRxfZpP38q8hgJXIAi_wDdi4jJnJA.js

525 ms

page.js

page.js

29 ms

js_Bfpeal9if86OpgVs30eGJyyBUXwMbB-OATGSTpEVItQ.js

js_Bfpeal9if86OpgVs30eGJyyBUXwMbB-OATGSTpEVItQ.js

612 ms

accordion.frontend.min.js

accordion.frontend.min.js

690 ms

js_JPICiHY253DAgpA4zMF630YiXL5-1sXpkAQpro63lBc.js

js_JPICiHY253DAgpA4zMF630YiXL5-1sXpkAQpro63lBc.js

696 ms

bf29a53ea6404dd59553851b3d380046.base.image.jpg

bf29a53ea6404dd59553851b3d380046.base.image.jpg

476 ms

f6c36262ccf14fa4b1fe3c8071474366.base.image.jpg

f6c36262ccf14fa4b1fe3c8071474366.base.image.jpg

598 ms

Recherche2.jpg

Recherche2.jpg

693 ms

Observation4.png

Observation4.png

712 ms

Formation2_0.png

Formation2_0.png

713 ms

LOGO_CNRS_2019_RVB.png

LOGO_CNRS_2019_RVB.png

774 ms

inrae_logo_369_x149_0.png

inrae_logo_369_x149_0.png

775 ms

UNIRENNES_LOGOnoir_CMJN.png

UNIRENNES_LOGOnoir_CMJN.png

778 ms

logo_universite-rennes2c.jpg

logo_universite-rennes2c.jpg

781 ms

logo_INSTITUT_AGRO_Rennes-Angers_CMJN_png.png

logo_INSTITUT_AGRO_Rennes-Angers_CMJN_png.png

783 ms

republique-francaise-logo.png

republique-francaise-logo.png

796 ms

hr.png

hr.png

859 ms

ddrs.png

ddrs.png

860 ms

educ.png

educ.png

864 ms

bienvenue.png

bienvenue.png

867 ms

shn.png

shn.png

873 ms

star.svg

star.svg

594 ms

arrow_left_grey.svg

arrow_left_grey.svg

656 ms

arrow_right_grey.svg

arrow_right_grey.svg

657 ms

Roboto-Regular.woff

Roboto-Regular.woff

590 ms

Roboto-Medium.woff

Roboto-Medium.woff

597 ms

Roboto-Light.woff

Roboto-Light.woff

611 ms

Roboto-Thin.woff

Roboto-Thin.woff

611 ms

Roboto-Bold.woff

Roboto-Bold.woff

673 ms

Unirennes-Light.woff

Unirennes-Light.woff

672 ms

Unirennes-Regular.woff

Unirennes-Regular.woff

678 ms

Unirennes-Bold.woff

Unirennes-Bold.woff

690 ms

Unirennes-ExtraBold.woff

Unirennes-ExtraBold.woff

632 ms

fa-solid-900.woff

fa-solid-900.woff

626 ms

sm.25.html

sm.25.html

26 ms

eso.D0Uc7kY6.js

eso.D0Uc7kY6.js

39 ms

fa-regular-400.woff

fa-regular-400.woff

578 ms

fa-brands-400.woff

fa-brands-400.woff

527 ms

matomo.php

matomo.php

210 ms

css_Y4H_4BqmgyCtG7E7YdseTs2qvy9C34c51kBamDdgark.css

css_Y4H_4BqmgyCtG7E7YdseTs2qvy9C34c51kBamDdgark.css

88 ms

Accessibility Review

osur.univ-rennes1.fr accessibility score

95

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

High

Links do not have a discernible name

Best Practices

osur.univ-rennes1.fr best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

osur.univ-rennes1.fr SEO score

84

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    FR

  • Language Claimed

    FR

  • Encoding

    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.

Social Sharing Optimization

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: