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

Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 99

    Accessibility

    Visual factors better than
    that of 96% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

irmar.univ-rennes1.fr

IRMAR - Institut de recherche mathématique de Rennes

Page Load Speed

4.6 sec in total

First Response

560 ms

Resources Loaded

3.8 sec

Page Rendered

266 ms

irmar.univ-rennes1.fr screenshot

About Website

Click here to check amazing IRMAR Univ Rennes 1 content for France. Otherwise, check out these important facts you probably never knew about irmar.univ-rennes1.fr

L'Institut de recherche mathématique de Rennes (IRMAR - UMR CNRS 6625) est une structure de recherche soutenue par l'Université de Rennes et le CNRS.

Visit irmar.univ-rennes1.fr

Key Findings

We analyzed Irmar.univ-rennes1.fr page load time and found that the first response time was 560 ms and then it took 4 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

irmar.univ-rennes1.fr performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

13/100

10%

LCP (Largest Contentful Paint)

Value11.5 s

0/100

25%

SI (Speed Index)

Value8.9 s

15/100

10%

TBT (Total Blocking Time)

Value310 ms

78/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value10.7 s

22/100

10%

Network Requests Diagram

irmar.univ-rennes1.fr

560 ms

irmar.univ-rennes1.fr

349 ms

irmar.univ-rennes.fr

1554 ms

matomo.js

825 ms

css_M6_Yh0qKc8k2nrTmPtfRzdCuvk_jYwlQm_SwwDx03oc.css

169 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Irmar.univ-rennes1.fr, 73% (47 requests) were made to Irmar.univ-rennes.fr and 6% (4 requests) were made to Unpkg.com. The less responsive or slowest element that took the longest time to load (1.6 sec) relates to the external source Irmar.univ-rennes.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 239.8 kB (15%)

Content Size

1.7 MB

After Optimization

1.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Irmar.univ-rennes1.fr main page is 1.7 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. 55% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 123.0 kB

  • Original 145.0 kB
  • After minification 138.2 kB
  • After compression 22.1 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 123.0 kB or 85% of the original size.

Image Optimization

-12%

Potential reduce by 116.5 kB

  • Original 1.0 MB
  • After minification 891.3 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. Obviously, IRMAR Univ Rennes 1 needs image optimization as it can save up to 116.5 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 93 B

  • Original 386.8 kB
  • After minification 386.8 kB
  • After compression 386.7 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 159 B

  • Original 110.4 kB
  • After minification 110.4 kB
  • After compression 110.2 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. Irmar.univ-rennes1.fr has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 25 (48%)

Requests Now

52

After Optimization

27

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of IRMAR 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 15 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

irmar.univ-rennes1.fr

irmar.univ-rennes1.fr

560 ms

irmar.univ-rennes1.fr

irmar.univ-rennes1.fr

349 ms

irmar.univ-rennes.fr

irmar.univ-rennes.fr

1554 ms

matomo.js

matomo.js

825 ms

css_M6_Yh0qKc8k2nrTmPtfRzdCuvk_jYwlQm_SwwDx03oc.css

css_M6_Yh0qKc8k2nrTmPtfRzdCuvk_jYwlQm_SwwDx03oc.css

169 ms

leaflet.css

leaflet.css

51 ms

css_ih4zQKCJq9Bo6bwMUAm7ig4YSPbnHpoCUUCRovsamxg.css

css_ih4zQKCJq9Bo6bwMUAm7ig4YSPbnHpoCUUCRovsamxg.css

256 ms

leaflet.fullscreen.css

leaflet.fullscreen.css

29 ms

leaflet-gesture-handling.min.css

leaflet-gesture-handling.min.css

67 ms

css_9VKwuSTTKysWHEjLPYkGvlyqfXAY8w4OKTqUO97vDzQ.css

css_9VKwuSTTKysWHEjLPYkGvlyqfXAY8w4OKTqUO97vDzQ.css

344 ms

css_qN9_uX_U8HKnlYGszY58NUMUCTlrG739Vwtv32xIZPM.css

css_qN9_uX_U8HKnlYGszY58NUMUCTlrG739Vwtv32xIZPM.css

260 ms

css_rdnUNp6BXi-udYU68toGKBLT0GeqUytU_Jx8wjK9dS0.css

css_rdnUNp6BXi-udYU68toGKBLT0GeqUytU_Jx8wjK9dS0.css

261 ms

css_WSoxk2ubvMMhdtAKKOvRgx3DnTmMgHM4bOuJeuAmTSE.css

css_WSoxk2ubvMMhdtAKKOvRgx3DnTmMgHM4bOuJeuAmTSE.css

433 ms

css_fDdF7CaIAnXh7xcrARGp_EW6zxYjmwu4gzyt9lqUSnE.css

css_fDdF7CaIAnXh7xcrARGp_EW6zxYjmwu4gzyt9lqUSnE.css

275 ms

leaflet.js

leaflet.js

83 ms

leaflet-providers.min.js

leaflet-providers.min.js

44 ms

Leaflet.fullscreen.min.js

Leaflet.fullscreen.min.js

26 ms

leaflet-gesture-handling.min.js

leaflet-gesture-handling.min.js

69 ms

js_RoVgYOtYF0zh_IwETTQgVqXJKuPu3dA7mWdBF36klnY.js

js_RoVgYOtYF0zh_IwETTQgVqXJKuPu3dA7mWdBF36klnY.js

346 ms

page.js

page.js

36 ms

js_xMflL1kvglWTW1sk1c9i6b3P7tC8zzNjVHZ6fpCT6g0.js

js_xMflL1kvglWTW1sk1c9i6b3P7tC8zzNjVHZ6fpCT6g0.js

536 ms

accordion.frontend.min.js

accordion.frontend.min.js

268 ms

js_utYdX10wHL3glPOr9YFLg_ZjlvE5-qWISKyeUzgsdYA.js

js_utYdX10wHL3glPOr9YFLg_ZjlvE5-qWISKyeUzgsdYA.js

451 ms

MathJax.js

MathJax.js

16 ms

js_oQ_clbsLU72B8yFZHUpmFNmzURR3Tu6l-FmW3SKkBXY.js

js_oQ_clbsLU72B8yFZHUpmFNmzURR3Tu6l-FmW3SKkBXY.js

622 ms

star.svg

star.svg

98 ms

irmar_0.png

irmar_0.png

99 ms

dsc02965-c.jpg

dsc02965-c.jpg

228 ms

carrousel_chl_0.png

carrousel_chl_0.png

228 ms

agence_lebesgue_5.png

agence_lebesgue_5.png

435 ms

photobibdoc-c.jpg

photobibdoc-c.jpg

377 ms

dsc02535-c.jpg

dsc02535-c.jpg

345 ms

arrow_left_grey.svg

arrow_left_grey.svg

343 ms

arrow_right_grey.svg

arrow_right_grey.svg

344 ms

italo2005.jpg

italo2005.jpg

346 ms

yafaev.JPG

yafaev.JPG

432 ms

IMG_20240624_111543_0.jpg

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378 ms

republique-francaise-logo.png

republique-francaise-logo.png

406 ms

hr.png

hr.png

405 ms

ddrs.png

ddrs.png

437 ms

educ.png

educ.png

437 ms

bienvenue.png

bienvenue.png

490 ms

shn.png

shn.png

490 ms

logo_cnrs_2020.png

logo_cnrs_2020.png

517 ms

logo-ens.png

logo-ens.png

519 ms

logo-insa.png

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523 ms

logo-ur_0.png

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522 ms

logo-ur2.png

logo-ur2.png

575 ms

Roboto-Regular.woff

Roboto-Regular.woff

504 ms

Roboto-Medium.woff

Roboto-Medium.woff

614 ms

Roboto-Light.woff

Roboto-Light.woff

531 ms

Roboto-Thin.woff

Roboto-Thin.woff

539 ms

Roboto-Bold.woff

Roboto-Bold.woff

627 ms

Unirennes-Light.woff

Unirennes-Light.woff

587 ms

Unirennes-Regular.woff

Unirennes-Regular.woff

592 ms

Unirennes-Bold.woff

Unirennes-Bold.woff

617 ms

Unirennes-ExtraBold.woff

Unirennes-ExtraBold.woff

628 ms

sm.25.html

sm.25.html

21 ms

eso.D0Uc7kY6.js

eso.D0Uc7kY6.js

34 ms

TeX-AMS-MML_HTMLorMML.js

TeX-AMS-MML_HTMLorMML.js

12 ms

accessibility-menu.js

accessibility-menu.js

51 ms

matomo.php

matomo.php

196 ms

css_bb4f2J-N0s6N1oFsrBFFk0nevGwo8I_U4LtHwc2RGLg.css

css_bb4f2J-N0s6N1oFsrBFFk0nevGwo8I_U4LtHwc2RGLg.css

87 ms

css_Y4H_4BqmgyCtG7E7YdseTs2qvy9C34c51kBamDdgark.css

css_Y4H_4BqmgyCtG7E7YdseTs2qvy9C34c51kBamDdgark.css

87 ms

Accessibility Review

irmar.univ-rennes1.fr accessibility score

99

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

irmar.univ-rennes1.fr best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

irmar.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 Irmar.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 Irmar.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

irmar.univ-rennes1.fr

Open Graph description is not detected on the main page of IRMAR 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: