Tools & Wizards About Us
unis.ens-lyon.fr screenshot

Report Summary

  • 75

    Performance

    Renders faster than
    84% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 64

    SEO

    Google-friendlier than
    24% of websites

unis.ens-lyon.fr

Usages Numériques et Ingénierie des Savoirs

Page Load Speed

8.3 sec in total

First Response

900 ms

Resources Loaded

7.2 sec

Page Rendered

151 ms

unis.ens-lyon.fr screenshot

About Website

Click here to check amazing Unis Ens Lyon content for France. Otherwise, check out these important facts you probably never knew about unis.ens-lyon.fr

Visit unis.ens-lyon.fr

Key Findings

We analyzed Unis.ens-lyon.fr page load time and found that the first response time was 900 ms and then it took 7.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

unis.ens-lyon.fr performance score

75

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

37/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

38/100

25%

SI (Speed Index)

Value4.2 s

77/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.053

98/100

15%

TTI (Time to Interactive)

Value3.5 s

92/100

10%

Network Requests Diagram

unis.ens-lyon.fr

900 ms

base-cachekey-689d5a00871a0dbdb103ee78759326a5.css

331 ms

collective.js.jqueryui.custom.min-cachekey-554725c20337c904be5ab5aae75a862c.css

368 ms

columns-cachekey-65cf20d658bd876df4d5cf9ea3ba9764.css

357 ms

dropdown-menu-cachekey-169ac69e6f54eec62c23240002f837a6.css

237 ms

Our browser made a total of 35 requests to load all elements on the main page. We found that all of those requests were addressed to Unis.ens-lyon.fr and no external sources were called. The less responsive or slowest element that took the longest time to load (4.9 sec) belongs to the original domain Unis.ens-lyon.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 42.3 kB (80%)

Content Size

53.0 kB

After Optimization

10.7 kB

  • HTML
  • Images

In fact, the total size of Unis.ens-lyon.fr main page is 53.0 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. 30% of websites need less resources to load. HTML takes 47.6 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 40.3 kB

  • Original 47.6 kB
  • After minification 37.9 kB
  • After compression 7.3 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 9.7 kB, which is 20% 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 40.3 kB or 85% of the original size.

Image Optimization

-37%

Potential reduce by 2.0 kB

  • Original 5.4 kB
  • After minification 3.4 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, Unis Ens Lyon needs image optimization as it can save up to 2.0 kB or 37% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

Requests Breakdown

Number of requests can be reduced by 19 (66%)

Requests Now

29

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Unis Ens Lyon. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

unis.ens-lyon.fr

unis.ens-lyon.fr

900 ms

base-cachekey-689d5a00871a0dbdb103ee78759326a5.css

base-cachekey-689d5a00871a0dbdb103ee78759326a5.css

331 ms

collective.js.jqueryui.custom.min-cachekey-554725c20337c904be5ab5aae75a862c.css

collective.js.jqueryui.custom.min-cachekey-554725c20337c904be5ab5aae75a862c.css

368 ms

columns-cachekey-65cf20d658bd876df4d5cf9ea3ba9764.css

columns-cachekey-65cf20d658bd876df4d5cf9ea3ba9764.css

357 ms

dropdown-menu-cachekey-169ac69e6f54eec62c23240002f837a6.css

dropdown-menu-cachekey-169ac69e6f54eec62c23240002f837a6.css

237 ms

print-cachekey-932614f566095963d725c61ba527ccf2.css

print-cachekey-932614f566095963d725c61ba527ccf2.css

373 ms

genclass-cachekey-34d824f737a5d97f0de1800b982d52e7.css

genclass-cachekey-34d824f737a5d97f0de1800b982d52e7.css

481 ms

enslyon-cachekey-9653d96606d0bb7897d5456fbae81492.css

enslyon-cachekey-9653d96606d0bb7897d5456fbae81492.css

556 ms

ploneCustom-cachekey-b49a8be0cc4f760c3b46d5f9880de554.css

ploneCustom-cachekey-b49a8be0cc4f760c3b46d5f9880de554.css

484 ms

resourceplone.app.jquery-cachekey-56d8ea91ee73208b11316c55711a3251.js

resourceplone.app.jquery-cachekey-56d8ea91ee73208b11316c55711a3251.js

1079 ms

resourcedropdown-menu-cachekey-ac93d5a76c1d303a1a899f3f379ca156.js

resourcedropdown-menu-cachekey-ac93d5a76c1d303a1a899f3f379ca156.js

694 ms

resourcepoipoi-cachekey-03b621b6b329239f73e6312d0314ccd9.js

resourcepoipoi-cachekey-03b621b6b329239f73e6312d0314ccd9.js

4925 ms

input_background.gif

input_background.gif

3598 ms

logoVert.gif

logoVert.gif

603 ms

arrowRight.gif

arrowRight.gif

488 ms

folder_icon.gif

folder_icon.gif

139 ms

text.png

text.png

310 ms

tar.png

tar.png

359 ms

pdf.png

pdf.png

391 ms

PoiTracker.gif

PoiTracker.gif

413 ms

application.png

application.png

412 ms

bg_search.gif

bg_search.gif

462 ms

btn_search.gif

btn_search.gif

496 ms

gb.gif

gb.gif

557 ms

fr.gif

fr.gif

654 ms

%3Cplone.app.layout.icons.icons.PloneSiteContentIcon%20object%20at%200xc987d10%3E

%3Cplone.app.layout.icons.icons.PloneSiteContentIcon%20object%20at%200xc987d10%3E

1093 ms

linkTransparent.gif

linkTransparent.gif

1207 ms

ens.png

ens.png

1102 ms

fleche.gif

fleche.gif

1112 ms

icones_plan.gif

icones_plan.gif

1142 ms

icones_accessibilite.gif

icones_accessibilite.gif

1151 ms

icones_mail.gif

icones_mail.gif

1211 ms

friseVert.gif

friseVert.gif

1218 ms

spinner.gif

spinner.gif

1219 ms

ens.png

ens.png

158 ms

Accessibility Review

unis.ens-lyon.fr accessibility score

92

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

Best Practices

unis.ens-lyon.fr best practices score

67

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

User Experience

Impact

Issue

High

Serves images with low resolution

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

unis.ens-lyon.fr SEO score

64

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

Language and Encoding

  • Language Detected

    FR

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Unis.ens-lyon.fr can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and it does not match the claimed English language. Our system also found out that Unis.ens-lyon.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

unis.ens-lyon.fr

Open Graph description is not detected on the main page of Unis Ens Lyon. 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: