Tools & Wizards About Us
vertigo.revues.org screenshot

Report Summary

  • 51

    Performance

    Renders faster than
    69% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

vertigo.revues.org

VertigO - la revue électronique en sciences de l'environnement

Page Load Speed

3.3 sec in total

First Response

313 ms

Resources Loaded

2.5 sec

Page Rendered

517 ms

vertigo.revues.org screenshot

About Website

Visit vertigo.revues.org now to see the best up-to-date VertigO Revue S content for France and also check out these interesting facts you probably never knew about vertigo.revues.org

La revue électronique VertigO, fondée en avril 2000, s'est donnée pour mandat la promotion et la diffusion, au sein de la francophonie, de recherches et d'opinions scientifiques sur les problématiques...

Visit vertigo.revues.org

Key Findings

We analyzed Vertigo.revues.org page load time and found that the first response time was 313 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

vertigo.revues.org performance score

51

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

14/100

10%

LCP (Largest Contentful Paint)

Value8.1 s

2/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value170 ms

93/100

30%

CLS (Cumulative Layout Shift)

Value0.091

92/100

15%

TTI (Time to Interactive)

Value8.3 s

40/100

10%

Network Requests Diagram

vertigo.revues.org

313 ms

533 ms

common.css

105 ms

base.css

208 ms

main.css

15 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Vertigo.revues.org, 60% (26 requests) were made to Journals.openedition.org and 33% (14 requests) were made to Static.openedition.org. The less responsive or slowest element that took the longest time to load (618 ms) relates to the external source Journals.openedition.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 226.7 kB (42%)

Content Size

538.4 kB

After Optimization

311.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vertigo.revues.org main page is 538.4 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. Images take 221.7 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 97.9 kB

  • Original 127.3 kB
  • After minification 110.7 kB
  • After compression 29.4 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. This page needs HTML code to be minified as it can gain 16.7 kB, which is 13% 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 97.9 kB or 77% of the original size.

Image Optimization

-12%

Potential reduce by 26.5 kB

  • Original 221.7 kB
  • After minification 195.2 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, VertigO Revue S needs image optimization as it can save up to 26.5 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-60%

Potential reduce by 99.0 kB

  • Original 165.8 kB
  • After minification 165.8 kB
  • After compression 66.8 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 99.0 kB or 60% of the original size.

CSS Optimization

-14%

Potential reduce by 3.2 kB

  • Original 23.6 kB
  • After minification 23.6 kB
  • After compression 20.4 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. Vertigo.revues.org needs all CSS files to be minified and compressed as it can save up to 3.2 kB or 14% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (50%)

Requests Now

40

After Optimization

20

  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of VertigO Revue S. 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 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vertigo.revues.org

vertigo.revues.org

313 ms

533 ms

common.css

common.css

105 ms

base.css

base.css

208 ms

main.css

main.css

15 ms

sitename.png

sitename.png

596 ms

jquery.js

jquery.js

490 ms

common.min.js

common.min.js

307 ms

tarteaucitron.js

tarteaucitron.js

14 ms

main.js

main.js

14 ms

jquery.jsonp-latest.min.js

jquery.jsonp-latest.min.js

14 ms

vertigo_page_de_couverture_vol_23_n_2-small250.png

vertigo_page_de_couverture_vol_23_n_2-small250.png

414 ms

twitter.png

twitter.png

395 ms

linkedin.png

linkedin.png

408 ms

google.png

google.png

414 ms

facebook.png

facebook.png

489 ms

rss.png

rss.png

511 ms

logo-vertigo.png

logo-vertigo.png

515 ms

Lg_ISE_2.5mm_3c.jpg

Lg_ISE_2.5mm_3c.jpg

517 ms

logo_FQRSC-small100.jpg

logo_FQRSC-small100.jpg

592 ms

sshrc_logo-small120.png

sshrc_logo-small120.png

590 ms

doaj.svg

doaj.svg

615 ms

logo-oej.png

logo-oej.png

618 ms

yui-cssreset.css

yui-cssreset.css

419 ms

maquette.css

maquette.css

486 ms

openeditionicon.css

openeditionicon.css

485 ms

sans-serif.css

sans-serif.css

104 ms

minimaliste.css

minimaliste.css

98 ms

breadcrumb-sep.png

breadcrumb-sep.png

46 ms

widgets.png

widgets.png

103 ms

bg.png

bg.png

99 ms

matomo.js

matomo.js

601 ms

langues_off.svg

langues_off.svg

20 ms

partager_off.svg

partager_off.svg

4 ms

fb_partage_off.svg

fb_partage_off.svg

6 ms

tweet_partager_off.svg

tweet_partager_off.svg

10 ms

google_partager_off.svg

google_partager_off.svg

5 ms

loupe_search_grey.svg

loupe_search_grey.svg

7 ms

tout_openedition.svg

tout_openedition.svg

8 ms

fb_off.svg

fb_off.svg

9 ms

tweet_off.svg

tweet_off.svg

10 ms

authenticate

authenticate

454 ms

print.css

print.css

105 ms

Accessibility Review

vertigo.revues.org accessibility score

78

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-hidden="true"] elements contain focusable descendents

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

Buttons do not have an accessible name

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

Some elements have a [tabindex] value greater than 0

Best Practices

vertigo.revues.org best practices score

58

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

High

Browser errors were logged to the console

SEO Factors

vertigo.revues.org SEO score

86

Search Engine Optimization Advices

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 doesn't use 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 Vertigo.revues.org 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 Vertigo.revues.org 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

vertigo.revues.org

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