Tools & Wizards About Us
www-instn.cea.fr screenshot

Report Summary

  • 25

    Performance

    Renders faster than
    44% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

www-instn.cea.fr

INSTN, the French school for energy and health technology

Page Load Speed

9.1 sec in total

First Response

509 ms

Resources Loaded

7.5 sec

Page Rendered

1.1 sec

www-instn.cea.fr screenshot

About Website

Welcome to www-instn.cea.fr homepage info - get ready to check Www INSTN Cea best content for France right away, or after learning these important things about www-instn.cea.fr

For more than 60 years, INSTN has been delivering highly specialized education programs and continuing professional development courses for operators, technicians, engineers, and scientists in France ...

Visit www-instn.cea.fr

Key Findings

We analyzed Www-instn.cea.fr page load time and found that the first response time was 509 ms and then it took 8.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

www-instn.cea.fr performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.5 s

6/100

10%

LCP (Largest Contentful Paint)

Value16.3 s

0/100

25%

SI (Speed Index)

Value12.6 s

3/100

10%

TBT (Total Blocking Time)

Value1,080 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value0.049

99/100

15%

TTI (Time to Interactive)

Value10.9 s

21/100

10%

Network Requests Diagram

www-instn.cea.fr

509 ms

1662 ms

style.min.css

186 ms

styles.css

289 ms

oxygen.css

334 ms

Our browser made a total of 108 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Www-instn.cea.fr, 84% (91 requests) were made to Instn.cea.fr and 6% (7 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (3.1 sec) relates to the external source Instn.cea.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 140.1 kB (4%)

Content Size

3.6 MB

After Optimization

3.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Www-instn.cea.fr main page is 3.6 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. 65% of websites need less resources to load. Images take 3.4 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 134.6 kB

  • Original 168.1 kB
  • After minification 164.9 kB
  • After compression 33.5 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 134.6 kB or 80% of the original size.

Image Optimization

-0%

Potential reduce by 5.4 kB

  • Original 3.4 MB
  • After minification 3.4 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. Www INSTN Cea images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 101 B

  • Original 21.6 kB
  • After minification 21.6 kB
  • After compression 21.5 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

-1%

Potential reduce by 42 B

  • Original 4.2 kB
  • After minification 4.2 kB
  • After compression 4.2 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. Www-instn.cea.fr has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 29 (31%)

Requests Now

94

After Optimization

65

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 94 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Www INSTN Cea. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www-instn.cea.fr

www-instn.cea.fr

509 ms

1662 ms

style.min.css

style.min.css

186 ms

styles.css

styles.css

289 ms

oxygen.css

oxygen.css

334 ms

front.min.css

front.min.css

304 ms

style.css

style.css

303 ms

jquery.min.js

jquery.min.js

350 ms

public_functions.js

public_functions.js

279 ms

front.min.js

front.min.js

322 ms

js

js

151 ms

css

css

149 ms

1631 ms

1493 ms

universal.css

universal.css

457 ms

slick.css

slick.css

147 ms

slick.min.js

slick.min.js

165 ms

unslider.css

unslider.css

408 ms

je_suis_je_cherche.css

je_suis_je_cherche.css

459 ms

regenerator-runtime.min.js

regenerator-runtime.min.js

459 ms

wp-polyfill.min.js

wp-polyfill.min.js

458 ms

index.js

index.js

555 ms

script.js

script.js

555 ms

script.js

script.js

520 ms

api.js

api.js

128 ms

index.js

index.js

521 ms

je_suis_je_cherche.js

je_suis_je_cherche.js

625 ms

unslider-min.js

unslider-min.js

613 ms

jquery.event.move.js

jquery.event.move.js

637 ms

jquery.event.swipe.js

jquery.event.swipe.js

625 ms

lazyload.min.js

lazyload.min.js

708 ms

analytics.js

analytics.js

120 ms

collect

collect

27 ms

pe03MImSLYBIv1o4X1M8cc8WAc5tU1Q.ttf

pe03MImSLYBIv1o4X1M8cc8WAc5tU1Q.ttf

54 ms

pe03MImSLYBIv1o4X1M8cc9yAs5tU1Q.ttf

pe03MImSLYBIv1o4X1M8cc9yAs5tU1Q.ttf

54 ms

pe0qMImSLYBIv1o4X1M8cce9I94.ttf

pe0qMImSLYBIv1o4X1M8cce9I94.ttf

53 ms

pe03MImSLYBIv1o4X1M8cc9iB85tU1Q.ttf

pe03MImSLYBIv1o4X1M8cc9iB85tU1Q.ttf

54 ms

pe03MImSLYBIv1o4X1M8cc8GBs5tU1Q.ttf

pe03MImSLYBIv1o4X1M8cc8GBs5tU1Q.ttf

80 ms

pe03MImSLYBIv1o4X1M8cc8aBc5tU1Q.ttf

pe03MImSLYBIv1o4X1M8cc8aBc5tU1Q.ttf

80 ms

pe03MImSLYBIv1o4X1M8cc8-BM5tU1Q.ttf

pe03MImSLYBIv1o4X1M8cc8-BM5tU1Q.ttf

65 ms

cea_logo_blanc.png

cea_logo_blanc.png

230 ms

instn_logo_blanc.png

instn_logo_blanc.png

226 ms

5.1.0-DSC_6776.jpg

5.1.0-DSC_6776.jpg

640 ms

Formation-continue-scaled.jpg

Formation-continue-scaled.jpg

707 ms

these.jpg

these.jpg

315 ms

conseil-1.jpg

conseil-1.jpg

324 ms

Aix-Marseille_Universite_Logo.png

Aix-Marseille_Universite_Logo.png

404 ms

CNAM_Logo.png

CNAM_Logo.png

411 ms

Esme-sudria-logo.png

Esme-sudria-logo.png

497 ms

ISTP-logo.png

ISTP-logo.png

498 ms

Logo_Sorbonne_Universit%C3%A9.png

Logo_Sorbonne_Universit%C3%A9.png

2183 ms

Logo_Universit%C3%A9_Grenoble-Alpes_2020.jpg

Logo_Universit%C3%A9_Grenoble-Alpes_2020.jpg

2441 ms

LOGO-PSL.png

LOGO-PSL.png

777 ms

LOGO-UNICAEN.png

LOGO-UNICAEN.png

835 ms

Universite-nimes.jpg

Universite-nimes.jpg

887 ms

universit-paris-saclay.png

universit-paris-saclay.png

950 ms

universite-de-montpellier-removebg-preview.png

universite-de-montpellier-removebg-preview.png

977 ms

apth.gif

apth.gif

1029 ms

CNESTEN.png

CNESTEN.png

1041 ms

hbni.jpg

hbni.jpg

1106 ms

ITHEMBA-LOGO-scaled.jpg

ITHEMBA-LOGO-scaled.jpg

1290 ms

LG-Vinatom.png

LG-Vinatom.png

1192 ms

logo_hyliad.jpg

logo_hyliad.jpg

1226 ms

MESRI.png

MESRI.png

1193 ms

Assystem.png

Assystem.png

1225 ms

collect

collect

61 ms

Bureau_Veritas.png

Bureau_Veritas.png

1231 ms

IRSN.png

IRSN.png

1291 ms

logo-edf-DP2D.png

logo-edf-DP2D.png

1293 ms

Logo-Framatome-HD.png

Logo-Framatome-HD.png

1401 ms

naval-group-removebg-preview.png

naval-group-removebg-preview.png

1310 ms

nuvia-removebg-preview.png

nuvia-removebg-preview.png

1298 ms

orano-removebg-preview-e1625584460324.png

orano-removebg-preview-e1625584460324.png

1299 ms

technicatom-removebg-preview-1.png

technicatom-removebg-preview-1.png

1288 ms

Dimplome.svg

Dimplome.svg

1338 ms

Formation.svg

Formation.svg

1331 ms

Conseil-accompagnement.svg

Conseil-accompagnement.svg

1330 ms

Th%C3%A8ses.svg

Th%C3%A8ses.svg

3087 ms

qualiopi.png

qualiopi.png

1256 ms

afaq.png

afaq.png

1177 ms

logo_sefri_blanc.png

logo_sefri_blanc.png

1176 ms

logo_cifmd_blanc.png

logo_cifmd_blanc.png

1155 ms

logo_iaea_blanc.png

logo_iaea_blanc.png

1176 ms

etat.png

etat.png

1039 ms

Capture-d%C3%A9cran-2021-04-23-%C3%A0-17.01.40.png

Capture-d%C3%A9cran-2021-04-23-%C3%A0-17.01.40.png

2705 ms

Capture-d%C3%A9cran-2021-04-23-%C3%A0-17.05.00.png

Capture-d%C3%A9cran-2021-04-23-%C3%A0-17.05.00.png

2718 ms

IMG-Home.jpg

IMG-Home.jpg

929 ms

846-964-thermal-hydraulics.jpg

846-964-thermal-hydraulics.jpg

992 ms

beryllium_Be.jpg

beryllium_Be.jpg

1113 ms

CEA-DCOM_0002657_WEB_Mur-dimages-de-la-Direction-de-lenergie-nucleaire.-Simulation-pour-la-conception-de-reacteurs-a-neutrons-rapides-de-4eme-generation..jpg

CEA-DCOM_0002657_WEB_Mur-dimages-de-la-Direction-de-lenergie-nucleaire.-Simulation-pour-la-conception-de-reacteurs-a-neutrons-rapides-de-4eme-generation..jpg

1335 ms

CEA_DCOM_0030396_WEB_LAMA-demantelement.jpg

CEA_DCOM_0030396_WEB_LAMA-demantelement.jpg

1225 ms

Structure-Gr-D-2.svg

Structure-Gr-D-2.svg

1320 ms

DSC_7037.jpg

DSC_7037.jpg

1669 ms

CEA-DCOM_0008668_ORI-scaled.jpg

CEA-DCOM_0008668_ORI-scaled.jpg

1556 ms

reacteur.jpg

reacteur.jpg

1405 ms

par-20191126-036-scaled.jpg

par-20191126-036-scaled.jpg

1580 ms

fond_home_actus.png

fond_home_actus.png

1624 ms

Arrow-Couleur-2.svg

Arrow-Couleur-2.svg

1659 ms

mooc-syst%C3%A8mes-energetiques-1.JPG

mooc-syst%C3%A8mes-energetiques-1.JPG

1716 ms

radiopharmaceutique-scaled.jpg

radiopharmaceutique-scaled.jpg

1700 ms

recaptcha__en.js

recaptcha__en.js

39 ms

radiopro-BTS.jpg

radiopro-BTS.jpg

1717 ms

conditionnement-dechets.png

conditionnement-dechets.png

1765 ms

Structure-Gr-D-3.svg

Structure-Gr-D-3.svg

1754 ms

cd-top-arrow.svg

cd-top-arrow.svg

1689 ms

Arrow-Couleur-D.svg

Arrow-Couleur-D.svg

1734 ms

Arrow-Gris-D.svg

Arrow-Gris-D.svg

1619 ms

Arrow-Gris-G.svg

Arrow-Gris-G.svg

1652 ms

Accessibility Review

www-instn.cea.fr accessibility score

95

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.

Names and labels

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.

Impact

Issue

High

Links do not have a discernible name

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

www-instn.cea.fr best practices score

83

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

SEO Factors

www-instn.cea.fr SEO score

84

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Www-instn.cea.fr can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Www-instn.cea.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

www-instn.cea.fr

Open Graph data is detected on the main page of Www INSTN Cea. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: