Report Summary

  • 28

    Performance

    Renders faster than
    48% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 75% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

irmar.univ-rennes1.fr

IRMAR - Institut de recherche mathématique de Rennes

Page Load Speed

3 sec in total

First Response

440 ms

Resources Loaded

2.4 sec

Page Rendered

131 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 440 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

irmar.univ-rennes1.fr performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

17/100

10%

LCP (Largest Contentful Paint)

Value9.8 s

0/100

25%

SI (Speed Index)

Value19.8 s

0/100

10%

TBT (Total Blocking Time)

Value810 ms

36/100

30%

CLS (Cumulative Layout Shift)

Value0.079

94/100

15%

TTI (Time to Interactive)

Value11.2 s

19/100

10%

Network Requests Diagram

irmar.univ-rennes1.fr

440 ms

base.css

699 ms

jquery.js

1207 ms

jquery.ui.js

1135 ms

jquery.accordion.js

711 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Irmar.univ-rennes1.fr, 96% (44 requests) were made to Ressources-infoglue.univ-rennes1.fr and 2% (1 request) were made to Visites.univ-rennes1.fr. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Ressources-infoglue.univ-rennes1.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 605.0 kB (77%)

Content Size

783.0 kB

After Optimization

178.0 kB

In fact, the total size of Irmar.univ-rennes1.fr main page is 783.0 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Javascripts take 677.4 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 15.6 kB

  • Original 21.6 kB
  • After minification 20.0 kB
  • After compression 6.0 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 15.6 kB or 72% of the original size.

Image Optimization

-32%

Potential reduce by 6.0 kB

  • Original 18.8 kB
  • After minification 12.8 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. Obviously, IRMAR Univ Rennes 1 needs image optimization as it can save up to 6.0 kB or 32% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-78%

Potential reduce by 529.3 kB

  • Original 677.4 kB
  • After minification 517.3 kB
  • After compression 148.2 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 529.3 kB or 78% of the original size.

CSS Optimization

-83%

Potential reduce by 54.1 kB

  • Original 65.1 kB
  • After minification 48.7 kB
  • After compression 11.1 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 needs all CSS files to be minified and compressed as it can save up to 54.1 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 39 (87%)

Requests Now

45

After Optimization

6

The browser has sent 45 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 10 to 1 for JavaScripts and from 24 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

irmar.univ-rennes1.fr accessibility score

90

Accessibility Issues

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

High

ARIA input fields do not have accessible names

High

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

High

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

Best Practices

irmar.univ-rennes1.fr best practices score

83

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

Missing source maps for large first-party JavaScript

SEO Factors

irmar.univ-rennes1.fr SEO score

92

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

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

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: