Tools & Wizards About Us
gustaveroussy.fr screenshot

Report Summary

  • 28

    Performance

    Renders faster than
    47% of other websites

  • 66

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

gustaveroussy.fr

Gustave Roussy | 1er centre de lutte contre le cancer en Europe

Page Load Speed

4.8 sec in total

First Response

263 ms

Resources Loaded

4.1 sec

Page Rendered

386 ms

gustaveroussy.fr screenshot

About Website

Click here to check amazing Gustave Roussy content for France. Otherwise, check out these important facts you probably never knew about gustaveroussy.fr

Premier centre de lutte contre le cancer en Europe, Gustave Roussy place l’innovation au cœur des soins et de la recherche contre le cancer, au bénéfice des patients.

Visit gustaveroussy.fr

Key Findings

We analyzed Gustaveroussy.fr page load time and found that the first response time was 263 ms and then it took 4.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

gustaveroussy.fr performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

20/100

10%

LCP (Largest Contentful Paint)

Value6.8 s

7/100

25%

SI (Speed Index)

Value4.8 s

67/100

10%

TBT (Total Blocking Time)

Value1,490 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0.145

77/100

15%

TTI (Time to Interactive)

Value11.4 s

19/100

10%

Network Requests Diagram

gustaveroussy.fr

263 ms

www.gustaveroussy.fr

1552 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

160 ms

css_MDQrMEOpwSL76Eo9PeEzwpjmm0edK2qJf2uCw-1440c.css

244 ms

css_HVxqfTmUYuVkKxkCTGaAsT_dnlFw6jIBSi9FjAtfN7A.css

324 ms

Our browser made a total of 82 requests to load all elements on the main page. We found that 83% of them (68 requests) were addressed to the original Gustaveroussy.fr, 2% (2 requests) were made to Fonts.googleapis.com and 2% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Gustaveroussy.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (37%)

Content Size

2.9 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Gustaveroussy.fr main page is 2.9 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. 50% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 96.6 kB

  • Original 117.8 kB
  • After minification 113.1 kB
  • After compression 21.2 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 96.6 kB or 82% of the original size.

Image Optimization

-4%

Potential reduce by 71.0 kB

  • Original 1.6 MB
  • After minification 1.5 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. Gustave Roussy images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 412.0 kB

  • Original 580.8 kB
  • After minification 481.7 kB
  • After compression 168.8 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 412.0 kB or 71% of the original size.

CSS Optimization

-84%

Potential reduce by 472.8 kB

  • Original 562.0 kB
  • After minification 526.8 kB
  • After compression 89.3 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. Gustaveroussy.fr needs all CSS files to be minified and compressed as it can save up to 472.8 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 33 (42%)

Requests Now

79

After Optimization

46

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 79 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Gustave Roussy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

gustaveroussy.fr

gustaveroussy.fr

263 ms

www.gustaveroussy.fr

www.gustaveroussy.fr

1552 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

160 ms

css_MDQrMEOpwSL76Eo9PeEzwpjmm0edK2qJf2uCw-1440c.css

css_MDQrMEOpwSL76Eo9PeEzwpjmm0edK2qJf2uCw-1440c.css

244 ms

css_HVxqfTmUYuVkKxkCTGaAsT_dnlFw6jIBSi9FjAtfN7A.css

css_HVxqfTmUYuVkKxkCTGaAsT_dnlFw6jIBSi9FjAtfN7A.css

324 ms

css_n5p0HGlmhgmp1yDStRNNXVSoGmD5ywFxGt2Fp95E6B0.css

css_n5p0HGlmhgmp1yDStRNNXVSoGmD5ywFxGt2Fp95E6B0.css

330 ms

css_WJF4873c9zEKjPB7TPEtklkHwHzVuQNPurLtlzSUTNY.css

css_WJF4873c9zEKjPB7TPEtklkHwHzVuQNPurLtlzSUTNY.css

330 ms

css_Zn2Jwov0oxfMZF15oTGHGqjLzMDSD3N7PWrnFO46Ays.css

css_Zn2Jwov0oxfMZF15oTGHGqjLzMDSD3N7PWrnFO46Ays.css

405 ms

css_jix1serKFVDfuBPilKHufP4mPtXDtFWvYwpFtAQlPqw.css

css_jix1serKFVDfuBPilKHufP4mPtXDtFWvYwpFtAQlPqw.css

491 ms

andre.css

andre.css

501 ms

robin.css

robin.css

486 ms

sergi.css

sergi.css

566 ms

jquery-1.8.2.min.js

jquery-1.8.2.min.js

25 ms

js_IkgOrrVZK1UTp2HktvFi5vo1g7b25Muyr5GoySikuic.js

js_IkgOrrVZK1UTp2HktvFi5vo1g7b25Muyr5GoySikuic.js

584 ms

js_9PoCIpaBdXzAfwjeoO2ibi_TtEs6jMROpVOwk-_WIBw.js

js_9PoCIpaBdXzAfwjeoO2ibi_TtEs6jMROpVOwk-_WIBw.js

585 ms

js_hbIBsOmf85-qXhwBWvt1klWpa5bdw6p7vSQjJA8YJYY.js

js_hbIBsOmf85-qXhwBWvt1klWpa5bdw6p7vSQjJA8YJYY.js

648 ms

js_5oTOCKyiEQZhpryhpMXLz7TNDT_SCfP9At5qiZI8VrU.js

js_5oTOCKyiEQZhpryhpMXLz7TNDT_SCfP9At5qiZI8VrU.js

652 ms

js_SXQoTqTwN5HldV1WwvIXRbxHMPNEmMuuV09dFwKb8GI.js

js_SXQoTqTwN5HldV1WwvIXRbxHMPNEmMuuV09dFwKb8GI.js

657 ms

js_-bVkX_zSBhrwwel5perScRuOcKVjxCWfC1HKuzqnnGo.js

js_-bVkX_zSBhrwwel5perScRuOcKVjxCWfC1HKuzqnnGo.js

1129 ms

js_np3LcDElS1mSFdfGY6yIJAgAo6vuCBCtAX7FFRXIIUk.js

js_np3LcDElS1mSFdfGY6yIJAgAo6vuCBCtAX7FFRXIIUk.js

819 ms

andre.js

andre.js

738 ms

css

css

56 ms

js_TulgkrgWVFMvT_7EUbhvXcXhDpJ_hCuecBJqYsBLPrA.js

js_TulgkrgWVFMvT_7EUbhvXcXhDpJ_hCuecBJqYsBLPrA.js

748 ms

css

css

17 ms

analytics.js

analytics.js

15 ms

collect

collect

2 ms

collect

collect

62 ms

ga-audiences

ga-audiences

34 ms

jquery.mousewheel.min.js

jquery.mousewheel.min.js

203 ms

5ZuFm4JBhcE

5ZuFm4JBhcE

236 ms

menumobile-left.png

menumobile-left.png

249 ms

logo.png

logo.png

250 ms

menumobile-right.png

menumobile-right.png

248 ms

magnifier.png

magnifier.png

249 ms

loupe.png

loupe.png

248 ms

male-user.png

male-user.png

252 ms

picto-social2.png

picto-social2.png

340 ms

gustave-roussy_enseigne_haute.jpg

gustave-roussy_enseigne_haute.jpg

498 ms

prisme.png

prisme.png

410 ms

banniere-infvous-plume_1.jpg

banniere-infvous-plume_1.jpg

496 ms

slide_marsbleu_2016-03-01.jpg

slide_marsbleu_2016-03-01.jpg

577 ms

slide-manifeste_1.jpg

slide-manifeste_1.jpg

568 ms

essais_cliniques_1.jpg

essais_cliniques_1.jpg

820 ms

consultation_sagatchian.jpg

consultation_sagatchian.jpg

649 ms

equipes_de_recherche_9.jpg

equipes_de_recherche_9.jpg

739 ms

patiente-cindy_1.jpg

patiente-cindy_1.jpg

659 ms

picto-soin.png

picto-soin.png

649 ms

btn-green.png

btn-green.png

659 ms

right-vert.png

right-vert.png

730 ms

close-vert.png

close-vert.png

732 ms

current-tab-nav.png

current-tab-nav.png

741 ms

sep-nav-table.png

sep-nav-table.png

741 ms

actu_marsbleu_2016-03-01.jpg

actu_marsbleu_2016-03-01.jpg

810 ms

picto-right-link.png

picto-right-link.png

811 ms

bg-programme-home_2.jpg

bg-programme-home_2.jpg

900 ms

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picto-programme_2.png

820 ms

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jefaisundon_2.jpg

900 ms

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890 ms

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1132 ms

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900 ms

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picto-sociaux.png

901 ms

gv-social.png

gv-social.png

972 ms

player.png

player.png

981 ms

trait-after.png

trait-after.png

980 ms

gutave_roussy.jpg

gutave_roussy.jpg

1061 ms

ytc.js

ytc.js

152 ms

picto-bottom-link.png

picto-bottom-link.png

831 ms

www-embed-player-vflQrT_sR.css

www-embed-player-vflQrT_sR.css

30 ms

www-embed-player.js

www-embed-player.js

49 ms

picto-comite-charte.jpg

picto-comite-charte.jpg

810 ms

picto-hon-code.jpg

picto-hon-code.jpg

818 ms

slider-nav.png

slider-nav.png

818 ms

backup.png

backup.png

818 ms

fr.png

fr.png

887 ms

en.png

en.png

895 ms

6BOEML_YqI6cKINK5dmh8ZufcXg7sBa4jeB-I9gQ0xI.js

6BOEML_YqI6cKINK5dmh8ZufcXg7sBa4jeB-I9gQ0xI.js

24 ms

ad_status.js

ad_status.js

67 ms

title-bg.gif

title-bg.gif

807 ms

arrow_lang.png

arrow_lang.png

737 ms

chosen-sprite.png

chosen-sprite.png

652 ms

cross.png

cross.png

719 ms

cross2.png

cross2.png

652 ms

Accessibility Review

gustaveroussy.fr accessibility score

66

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

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

Image elements do not have [alt] attributes

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

gustaveroussy.fr best practices score

75

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

SEO Factors

gustaveroussy.fr SEO score

93

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

Image elements do not have [alt] attributes

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

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 Gustaveroussy.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 Gustaveroussy.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

gustaveroussy.fr

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