Access pourlascience.fr. Pour la Science - la science expliquée par ceux qui la font

name

value

score

weighting

FCP (First Contentful Paint)

Value8.8 s

0/100

10%

LCP (Largest Contentful Paint)

Value19.4 s

0/100

25%

SI (Speed Index)

Value14.9 s

1/100

10%

TBT (Total Blocking Time)

Value2,480 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.201

62/100

15%

TTI (Time to Interactive)

Value23.9 s

1/100

10%

pourlascience.fr

384 ms

www.pourlascience.fr

477 ms

authorize

411 ms

login

154 ms

www.pourlascience.fr

867 ms

Our browser made a total of 99 requests to load all elements on the main page. We found that 30% of them (30 requests) were addressed to the original Pourlascience.fr, 43% (43 requests) were made to Medias.pourlascience.fr and 4% (4 requests) were made to Bat.bing.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Medias.pourlascience.fr.

Content Size

1.7 MB

After Optimization

1.3 MB

In fact, the total size of Pourlascience.fr main page is 1.7 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 961.5 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 140.6 kB

Original 165.9 kB
After minification 130.5 kB
After compression 25.3 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. This page needs HTML code to be minified as it can gain 35.3 kB, which is 21% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 140.6 kB or 85% of the original size.

Image Optimization

-1%

Potential reduce by 11.1 kB

Original 961.5 kB
After minification 950.4 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. Pour La Science images are well optimized though.

JavaScript Optimization

-37%

Potential reduce by 147.9 kB

Original 403.0 kB
After minification 403.0 kB
After compression 255.1 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 147.9 kB or 37% of the original size.

CSS Optimization

-83%

Potential reduce by 146.8 kB

Original 176.7 kB
After minification 169.2 kB
After compression 29.9 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. Pourlascience.fr needs all CSS files to be minified and compressed as it can save up to 146.8 kB or 83% of the original size.

Requests Now

After Optimization

The browser has sent 87 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Pour La Science. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

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

High

Heading elements are not in a sequentially-descending order

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

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

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

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

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

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/).

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 Pourlascience.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 Pourlascience.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

pourlascience.fr

Open Graph description is not detected on the main page of Pour La Science. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

Pour la Science - la science expliquée par ceux qui la font

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

pourlascience.fr

www.pourlascience.fr

authorize

login

www.pourlascience.fr

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

pourlascience.fr

www.pourlascience.fr

authorize

login

www.pourlascience.fr

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