Tools & Wizards About Us
chercheurs.edf.com screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

chercheurs.edf.com

R&D : innover pour inventer le futur de l’énergie | EDF FR

Page Load Speed

3.5 sec in total

First Response

518 ms

Resources Loaded

2.8 sec

Page Rendered

161 ms

chercheurs.edf.com screenshot

About Website

Welcome to chercheurs.edf.com homepage info - get ready to check Chercheurs EDF best content for France right away, or after learning these important things about chercheurs.edf.com

Activités, projets et travaux de recherche : EDF met la R&D au cœur de ses activités pour améliorer sa performance et concevoir les technologies de demain.

Visit chercheurs.edf.com

Key Findings

We analyzed Chercheurs.edf.com page load time and found that the first response time was 518 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

chercheurs.edf.com performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value7.9 s

3/100

25%

SI (Speed Index)

Value10.3 s

8/100

10%

TBT (Total Blocking Time)

Value5,060 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.175

69/100

15%

TTI (Time to Interactive)

Value11.8 s

17/100

10%

Network Requests Diagram

chercheurs.edf.com

518 ms

chercheurs-edf-209797.html

425 ms

AC_RunActiveContent.js

172 ms

block_SCOOP_IT.css

177 ms

habillageHome.php

181 ms

Our browser made a total of 50 requests to load all elements on the main page. We found that 92% of them (46 requests) were addressed to the original Chercheurs.edf.com, 4% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Sb.scorecardresearch.com. The less responsive or slowest element that took the longest time to load (748 ms) belongs to the original domain Chercheurs.edf.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 550.9 kB (48%)

Content Size

1.2 MB

After Optimization

606.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chercheurs.edf.com main page is 1.2 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. 15% of websites need less resources to load. Javascripts take 591.3 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 28.8 kB

  • Original 37.2 kB
  • After minification 36.3 kB
  • After compression 8.4 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 28.8 kB or 77% of the original size.

Image Optimization

-4%

Potential reduce by 15.7 kB

  • Original 419.8 kB
  • After minification 404.1 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. Chercheurs EDF images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 415.1 kB

  • Original 591.3 kB
  • After minification 577.8 kB
  • After compression 176.3 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 415.1 kB or 70% of the original size.

CSS Optimization

-84%

Potential reduce by 91.3 kB

  • Original 108.7 kB
  • After minification 85.4 kB
  • After compression 17.4 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. Chercheurs.edf.com needs all CSS files to be minified and compressed as it can save up to 91.3 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (63%)

Requests Now

48

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chercheurs EDF. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

chercheurs.edf.com

chercheurs.edf.com

518 ms

chercheurs-edf-209797.html

chercheurs-edf-209797.html

425 ms

AC_RunActiveContent.js

AC_RunActiveContent.js

172 ms

block_SCOOP_IT.css

block_SCOOP_IT.css

177 ms

habillageHome.php

habillageHome.php

181 ms

template_T1.css

template_T1.css

270 ms

template_tools.css

template_tools.css

178 ms

jquery.fancybox.css

jquery.fancybox.css

193 ms

page_T1P1.css

page_T1P1.css

265 ms

block_coveflow_T1P1_T1P2.css

block_coveflow_T1P1_T1P2.css

272 ms

site_blocsModulaires.css

site_blocsModulaires.css

364 ms

jquery.full.edf.js

jquery.full.edf.js

748 ms

custom.edf.js

custom.edf.js

297 ms

block_coverflow_T1P1_T1P2.js

block_coverflow_T1P1_T1P2.js

354 ms

site_blocsModulaires.js

site_blocsModulaires.js

369 ms

cs.js

cs.js

27 ms

wreport_Chercheurs.js

wreport_Chercheurs.js

308 ms

wreport_grp.js

wreport_grp.js

356 ms

wysiwyg.css

wysiwyg.css

282 ms

habillageHome.php

habillageHome.php

104 ms

t1_logo_edf.png

t1_logo_edf.png

92 ms

t1_header_top_separator.png

t1_header_top_separator.png

99 ms

picto-toggle-arrow-bg.png

picto-toggle-arrow-bg.png

97 ms

header-search-btn.png

header-search-btn.png

100 ms

analytics.js

analytics.js

5 ms

t1_main_navigation_bg.png

t1_main_navigation_bg.png

97 ms

t1_main_navigation_separator.png

t1_main_navigation_separator.png

176 ms

loader-teaser.gif

loader-teaser.gif

190 ms

button-bg.png

button-bg.png

186 ms

slider_theses_resultats_3.jpg

slider_theses_resultats_3.jpg

380 ms

ville-durable-carrousel-2.jpg

ville-durable-carrousel-2.jpg

286 ms

643px_la_PAC_industrielle.jpg

643px_la_PAC_industrielle.jpg

483 ms

smartgrids.jpg

smartgrids.jpg

354 ms

soultz_slider.jpg

soultz_slider.jpg

569 ms

200_PACbatiments.jpg

200_PACbatiments.jpg

287 ms

list-arrow-bg.png

list-arrow-bg.png

381 ms

t1_footer_actions_top_bg.png

t1_footer_actions_top_bg.png

381 ms

tc_EspaceVisiteurEDF_1.js

tc_EspaceVisiteurEDF_1.js

437 ms

serviceGetNavigationTop.php

serviceGetNavigationTop.php

656 ms

serviceGetCookieBox.php

serviceGetCookieBox.php

743 ms

collect

collect

11 ms

teaser-scroll-right.png

teaser-scroll-right.png

435 ms

teaser-scroll-left.png

teaser-scroll-left.png

491 ms

200_PACbatiments.jpg

200_PACbatiments.jpg

536 ms

cs.js

cs.js

78 ms

block_cookie_box.css

block_cookie_box.css

97 ms

close.png

close.png

89 ms

list-arrow-bg_white.png

list-arrow-bg_white.png

96 ms

template_T1_print.css

template_T1_print.css

97 ms

page_T1P1_print.css

page_T1P1_print.css

98 ms

Accessibility Review

chercheurs.edf.com accessibility score

100

Accessibility Issues

Best Practices

chercheurs.edf.com best practices score

75

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

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

chercheurs.edf.com SEO score

97

Search Engine Optimization Advices

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 Chercheurs.edf.com 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 Chercheurs.edf.com 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

chercheurs.edf.com

Open Graph description is not detected on the main page of Chercheurs EDF. 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: