Tools & Wizards About Us
phototheque.cnrs.fr screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 78% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

phototheque.cnrs.fr

CNRS Images - Découvrez la recherche scientifique en images

Page Load Speed

2.7 sec in total

First Response

375 ms

Resources Loaded

2 sec

Page Rendered

320 ms

phototheque.cnrs.fr screenshot

About Website

Welcome to phototheque.cnrs.fr homepage info - get ready to check Phototheque CNRS best content for France right away, or after learning these important things about phototheque.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 phototheque.cnrs.fr

Key Findings

We analyzed Phototheque.cnrs.fr page load time and found that the first response time was 375 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

phototheque.cnrs.fr performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.9 s

4/100

10%

LCP (Largest Contentful Paint)

Value11.3 s

0/100

25%

SI (Speed Index)

Value13.8 s

1/100

10%

TBT (Total Blocking Time)

Value770 ms

38/100

30%

CLS (Cumulative Layout Shift)

Value0.053

98/100

15%

TTI (Time to Interactive)

Value18.7 s

3/100

10%

Network Requests Diagram

phototheque.cnrs.fr

375 ms

font.css

152 ms

common.css

237 ms

sidebar.css

165 ms

rendering.css

240 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that all of those requests were addressed to Phototheque.cnrs.fr and no external sources were called. The less responsive or slowest element that took the longest time to load (876 ms) belongs to the original domain Phototheque.cnrs.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 392.5 kB (71%)

Content Size

551.7 kB

After Optimization

159.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Phototheque.cnrs.fr main page is 551.7 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. 25% of websites need less resources to load. Javascripts take 393.6 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 20.7 kB

  • Original 27.8 kB
  • After minification 25.3 kB
  • After compression 7.0 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 20.7 kB or 75% of the original size.

Image Optimization

-11%

Potential reduce by 3.7 kB

  • Original 32.4 kB
  • After minification 28.8 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, Phototheque CNRS needs image optimization as it can save up to 3.7 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-72%

Potential reduce by 284.9 kB

  • Original 393.6 kB
  • After minification 381.0 kB
  • After compression 108.7 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 284.9 kB or 72% of the original size.

CSS Optimization

-85%

Potential reduce by 83.2 kB

  • Original 98.0 kB
  • After minification 78.7 kB
  • After compression 14.7 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. Phototheque.cnrs.fr needs all CSS files to be minified and compressed as it can save up to 83.2 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (50%)

Requests Now

24

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Phototheque 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 6 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

phototheque.cnrs.fr

phototheque.cnrs.fr

375 ms

font.css

font.css

152 ms

common.css

common.css

237 ms

sidebar.css

sidebar.css

165 ms

rendering.css

rendering.css

240 ms

loadingbar.css

loadingbar.css

165 ms

jquery.ui.css

jquery.ui.css

242 ms

jquery.mCustomScrollbar.css

jquery.mCustomScrollbar.css

227 ms

jquery.vegas.min.css

jquery.vegas.min.css

245 ms

jquery_1.9.1.js

jquery_1.9.1.js

478 ms

jquery_migrate.js

jquery_migrate.js

306 ms

jquery-ui-1.10.2.custom.min.js

jquery-ui-1.10.2.custom.min.js

699 ms

jquery.vegas.min.js

jquery.vegas.min.js

316 ms

jquery.mCustomScrollbar.js

jquery.mCustomScrollbar.js

434 ms

jquery.cookie.js

jquery.cookie.js

319 ms

20130001_1874.jpg

20130001_1874.jpg

876 ms

bulle.png

bulle.png

82 ms

Arial%20Narrow-webfont.woff

Arial%20Narrow-webfont.woff

83 ms

Arial%20Narrow%20Bold-webfont.ttf

Arial%20Narrow%20Bold-webfont.ttf

238 ms

logo.FR.png

logo.FR.png

83 ms

top-degrade.gif

top-degrade.gif

82 ms

collapser.png

collapser.png

157 ms

logo_small.png

logo_small.png

159 ms

info.png

info.png

159 ms

loupe_big.png

loupe_big.png

159 ms

users.gif

users.gif

235 ms

password.gif

password.gif

231 ms

Accessibility Review

phototheque.cnrs.fr accessibility score

92

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

phototheque.cnrs.fr best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

phototheque.cnrs.fr SEO score

91

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

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Phototheque.cnrs.fr can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Phototheque.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

phototheque.cnrs.fr

Open Graph description is not detected on the main page of Phototheque CNRS. 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: