Tools & Wizards About Us
videotheque.cnrs.fr screenshot

Report Summary

  • 53

    Performance

    Renders faster than
    70% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

videotheque.cnrs.fr

CNRS Images - Découvrez la recherche scientifique en images

Page Load Speed

5.5 sec in total

First Response

524 ms

Resources Loaded

3.7 sec

Page Rendered

1.4 sec

videotheque.cnrs.fr screenshot

About Website

Click here to check amazing Videotheque CNRS content for France. Otherwise, check out these important facts you probably never knew about videotheque.cnrs.fr

CNRS Images est la plateforme d’images du CNRS : photos, videos, films et expositions sur l’actualité de la recherche, tous les domaines scientifiques et les sciences au 20e siècle.

Visit videotheque.cnrs.fr

Key Findings

We analyzed Videotheque.cnrs.fr page load time and found that the first response time was 524 ms and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

videotheque.cnrs.fr performance score

53

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

6/100

10%

LCP (Largest Contentful Paint)

Value11.1 s

0/100

25%

SI (Speed Index)

Value6.7 s

35/100

10%

TBT (Total Blocking Time)

Value70 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value8.4 s

38/100

10%

Network Requests Diagram

images.cnrs.fr

524 ms

css_z_ua_8O9Cs4HhRTfsFW8rQYZPNEvFyYhOCCPeaJln8Y.css

162 ms

css_e_5GTlixH3A9hGNRG3-UbMLcvYVYnKPBTvs5lTpCSyU.css

712 ms

css_9fp6D-MgZ2zBN9eLAobtHIAXyEIwGjct8_Fo2Jw_qNc.css

242 ms

cnrs_20240013_0001_HD.jpg

400 ms

Our browser made a total of 76 requests to load all elements on the main page. We found that all of those requests were addressed to Videotheque.cnrs.fr and no external sources were called. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Images.cnrs.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (31%)

Content Size

3.7 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Videotheque.cnrs.fr main page is 3.7 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 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 81.8 kB

  • Original 97.2 kB
  • After minification 89.3 kB
  • After compression 15.4 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 81.8 kB or 84% of the original size.

Image Optimization

-3%

Potential reduce by 68.6 kB

  • Original 2.4 MB
  • After minification 2.4 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. Videotheque CNRS images are well optimized though.

JavaScript Optimization

-75%

Potential reduce by 412.2 kB

  • Original 552.9 kB
  • After minification 552.9 kB
  • After compression 140.7 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 412.2 kB or 75% of the original size.

CSS Optimization

-88%

Potential reduce by 579.8 kB

  • Original 660.9 kB
  • After minification 658.2 kB
  • After compression 81.2 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. Videotheque.cnrs.fr needs all CSS files to be minified and compressed as it can save up to 579.8 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (4%)

Requests Now

73

After Optimization

70

  • Images
  • JavaScript
  • CSS

The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Videotheque CNRS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

images.cnrs.fr

images.cnrs.fr

524 ms

css_z_ua_8O9Cs4HhRTfsFW8rQYZPNEvFyYhOCCPeaJln8Y.css

css_z_ua_8O9Cs4HhRTfsFW8rQYZPNEvFyYhOCCPeaJln8Y.css

162 ms

css_e_5GTlixH3A9hGNRG3-UbMLcvYVYnKPBTvs5lTpCSyU.css

css_e_5GTlixH3A9hGNRG3-UbMLcvYVYnKPBTvs5lTpCSyU.css

712 ms

css_9fp6D-MgZ2zBN9eLAobtHIAXyEIwGjct8_Fo2Jw_qNc.css

css_9fp6D-MgZ2zBN9eLAobtHIAXyEIwGjct8_Fo2Jw_qNc.css

242 ms

cnrs_20240013_0001_HD.jpg

cnrs_20240013_0001_HD.jpg

400 ms

logo-cnrs-blanc.svg

logo-cnrs-blanc.svg

247 ms

Chambord%202.png

Chambord%202.png

558 ms

CNRS_20240060_0002_71101.jpg

CNRS_20240060_0002_71101.jpg

365 ms

CNRS_20210071_0001_64345.jpg

CNRS_20210071_0001_64345.jpg

457 ms

CNRS_20230003_0007_68525.jpg

CNRS_20230003_0007_68525.jpg

551 ms

CNRS_20230013_0024_68650.jpg

CNRS_20230013_0024_68650.jpg

581 ms

CNRS_20220152_0015_68452.jpg

CNRS_20220152_0015_68452.jpg

592 ms

CNRS_20200003_0002_62421.jpg

CNRS_20200003_0002_62421.jpg

687 ms

CNRS_20150001_0119_4430.jpg

CNRS_20150001_0119_4430.jpg

965 ms

CNRS_20070001_0707_14851.jpg

CNRS_20070001_0707_14851.jpg

963 ms

CNRS_20150001_0154_1162.jpg

CNRS_20150001_0154_1162.jpg

964 ms

CNRS_20190044_0074_61330.jpg

CNRS_20190044_0074_61330.jpg

967 ms

MN03486_hd_00033000.jpg

MN03486_hd_00033000.jpg

893 ms

js_4BAwYStXzUS1AesLONOzJKtBC2KRl_t6JMcgbkhh1cE.js

js_4BAwYStXzUS1AesLONOzJKtBC2KRl_t6JMcgbkhh1cE.js

890 ms

CNRS_20240028_0007_70577.jpg

CNRS_20240028_0007_70577.jpg

939 ms

MN03533_hd_00013300.jpg

MN03533_hd_00013300.jpg

899 ms

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MN03479_hd_00012500.jpg

899 ms

photo_destins.jpg

photo_destins.jpg

899 ms

CNRS_20240032_0003_70611.jpg

CNRS_20240032_0003_70611.jpg

1058 ms

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900 ms

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900 ms

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913 ms

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929 ms

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955 ms

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955 ms

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994 ms

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1010 ms

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1017 ms

cnrs_20170038_0007.jpg

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1034 ms

CNRS_19000001_0484.jpg

CNRS_19000001_0484.jpg

1035 ms

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CNRS_19000001_1224.jpg

1075 ms

CNRS_19000001_1259.jpg

CNRS_19000001_1259.jpg

1091 ms

oYcF_fXPWxOpFPvbDRUJpMWdWYpG-SwguyiSOesKwp0.jpg

oYcF_fXPWxOpFPvbDRUJpMWdWYpG-SwguyiSOesKwp0.jpg

1021 ms

ngGIMG_4rL2Y8grXcbxz8SSFZAn92hgs7ZrSBHserwM.jpg

ngGIMG_4rL2Y8grXcbxz8SSFZAn92hgs7ZrSBHserwM.jpg

958 ms

CNRS_20230114_0001_70054.jpg

CNRS_20230114_0001_70054.jpg

1142 ms

CNRS_20230105_0009_69984.jpg

CNRS_20230105_0009_69984.jpg

1003 ms

CNRS_20230105_0007_69940.jpg

CNRS_20230105_0007_69940.jpg

1001 ms

CNRS_20230104_0018_69979.jpg

CNRS_20230104_0018_69979.jpg

1072 ms

CNRS_20230104_0016_69936.jpg

CNRS_20230104_0016_69936.jpg

1049 ms

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CNRS_20230093_0010_69688.jpg

1058 ms

CNRS_20230108_0010_69997.jpg

CNRS_20230108_0010_69997.jpg

1036 ms

MN03422_hd_00032400.jpg

MN03422_hd_00032400.jpg

880 ms

CNRS_20240008_0002_70413.jpg

CNRS_20240008_0002_70413.jpg

1004 ms

CNRS_20230109_0001_69999.jpg

CNRS_20230109_0001_69999.jpg

837 ms

MN03389_hd_00001200.jpg

MN03389_hd_00001200.jpg

646 ms

CNRS_20230113_0004_70053.jpg

CNRS_20230113_0004_70053.jpg

861 ms

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CNRS_20230104_0010_69934.jpg

912 ms

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CNRS_20230094_0088_69781.jpg

907 ms

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CNRS_20230097_0013_69845.jpg

917 ms

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CNRS_20230092_0002_69680.jpg

993 ms

CNRS_20230113_0009_70208.jpg

CNRS_20230113_0009_70208.jpg

1341 ms

CNRS_20240010_0001_70433.jpg

CNRS_20240010_0001_70433.jpg

1462 ms

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culture_physique_EP2_capture_1%5B1%5D.jpg

978 ms

Image%20Echos%2013.tif_.jpg

Image%20Echos%2013.tif_.jpg

980 ms

icomoon.ttf

icomoon.ttf

995 ms

icomoon.ttf

icomoon.ttf

1051 ms

CNRS_20210036_0053rec.jpg

CNRS_20210036_0053rec.jpg

1035 ms

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1049 ms

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1033 ms

yt_logo_rgb_light.png

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1087 ms

instagram-logo.png

instagram-logo.png

1049 ms

cnrsjournal.png

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1039 ms

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la_saga_de_logo_v2.png

1040 ms

marianne.svg

marianne.svg

1092 ms

logo.svg

logo.svg

1089 ms

menu-expanded.png

menu-expanded.png

1073 ms

lettre_ZDS.svg

lettre_ZDS.svg

1062 ms

lettre_CNRS.svg

lettre_CNRS.svg

1113 ms

drag-cursor-small.svg

drag-cursor-small.svg

1107 ms

drag-cursor.svg

drag-cursor.svg

1094 ms

css_2kzwaZgA7pkS2JjRz2DbOO3SdeTlfNiiJ6_nLxcUCuM.css

css_2kzwaZgA7pkS2JjRz2DbOO3SdeTlfNiiJ6_nLxcUCuM.css

83 ms

Accessibility Review

videotheque.cnrs.fr accessibility score

88

Accessibility Issues

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

High

Links do not have a discernible name

Best Practices

videotheque.cnrs.fr best practices score

92

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

Missing source maps for large first-party JavaScript

SEO Factors

videotheque.cnrs.fr SEO score

84

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

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 Videotheque.cnrs.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 Videotheque.cnrs.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

videotheque.cnrs.fr

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