Access esir.univ-rennes1.fr. ESIR | Ecole supérieure d'ingénieurs de Rennes

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

13/100

10%

LCP (Largest Contentful Paint)

Value13.4 s

0/100

25%

SI (Speed Index)

Value6.9 s

34/100

10%

TBT (Total Blocking Time)

Value260 ms

83/100

30%

CLS (Cumulative Layout Shift)

Value0.077

95/100

15%

TTI (Time to Interactive)

Value9.9 s

27/100

10%

esir.univ-rennes1.fr

259 ms

esir.univ-rennes1.fr

358 ms

esir.univ-rennes.fr

572 ms

matomo.js

789 ms

css_LLiICWna101nNIKOt54Q7E-mxH73Y8zRqXpwcB9skKc.css

168 ms

Our browser made a total of 123 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Esir.univ-rennes1.fr, 86% (106 requests) were made to Esir.univ-rennes.fr and 3% (4 requests) were made to Unpkg.com. The less responsive or slowest element that took the longest time to load (789 ms) relates to the external source Visites.univ-rennes1.fr.

Content Size

2.5 MB

After Optimization

2.2 MB

In fact, the total size of Esir.univ-rennes1.fr main page is 2.5 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. 70% of websites need less resources to load. Images take 2.1 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 105.0 kB

Original 127.8 kB
After minification 119.8 kB
After compression 22.8 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. 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 105.0 kB or 82% of the original size.

Image Optimization

-8%

Potential reduce by 168.4 kB

Original 2.1 MB
After minification 1.9 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. ESIR Univ Rennes 1 images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 205 B

Original 223.5 kB
After minification 223.5 kB
After compression 223.3 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 108 B

Original 103.3 kB
After minification 103.3 kB
After compression 103.2 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. Esir.univ-rennes1.fr has all CSS files already compressed.

Requests Now

110

After Optimization

The browser has sent 110 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ESIR 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 9 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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.

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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

High

Links are not crawlable

High

Page is blocked from indexing

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/).

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 Esir.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 Esir.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

esir.univ-rennes1.fr

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

Report Summary

Performance

Accessibility

Best Practices

SEO

ESIR | Ecole supérieure d'ingénieurs de Rennes

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

esir.univ-rennes1.fr

esir.univ-rennes1.fr

esir.univ-rennes.fr

matomo.js

css_LLiICWna101nNIKOt54Q7E-mxH73Y8zRqXpwcB9skKc.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

esir.univ-rennes1.fr

esir.univ-rennes1.fr

esir.univ-rennes.fr

matomo.js

css_LLiICWna101nNIKOt54Q7E-mxH73Y8zRqXpwcB9skKc.css

leaflet.css

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css_HEtSVRXYy3qnXm7MAsd_VVQKf2GDsP5iYrTcI3LSKpE.css

leaflet.js

leaflet-providers.min.js

Leaflet.fullscreen.min.js

leaflet-gesture-handling.min.js

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page.js

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accordion.frontend.min.js

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MathJax.js

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star.svg

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promo.jpg

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