Tools & Wizards About Us
vertigo.revues.org screenshot

Report Summary

  • 23

    Performance

    Renders faster than
    42% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 43% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 89

    SEO

    Google-friendlier than
    67% of websites

vertigo.revues.org

VertigO - la revue électronique en sciences de l'environnement

Page Load Speed

7.6 sec in total

First Response

380 ms

Resources Loaded

4 sec

Page Rendered

3.2 sec

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 380 ms and then it took 7.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

vertigo.revues.org performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value7.0 s

6/100

25%

SI (Speed Index)

Value8.0 s

22/100

10%

TBT (Total Blocking Time)

Value2,160 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.091

92/100

15%

TTI (Time to Interactive)

Value10.8 s

22/100

10%

Network Requests Diagram

vertigo.revues.org

380 ms

519 ms

common.css

95 ms

screen.css

272 ms

main.css

545 ms

Our browser made a total of 45 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, 51% (23 requests) were made to Journals.openedition.org and 31% (14 requests) were made to Static-origin.openedition.org. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Journals.openedition.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 190.0 kB (50%)

Content Size

378.2 kB

After Optimization

188.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vertigo.revues.org main page is 378.2 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. 35% of websites need less resources to load. Javascripts take 163.9 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 81.1 kB

  • Original 107.1 kB
  • After minification 93.4 kB
  • After compression 26.0 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. This page needs HTML code to be minified as it can gain 13.7 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 81.1 kB or 76% of the original size.

Image Optimization

-10%

Potential reduce by 9.0 kB

  • Original 88.3 kB
  • After minification 79.4 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. VertigO Revue S images are well optimized though.

JavaScript Optimization

-60%

Potential reduce by 97.9 kB

  • Original 163.9 kB
  • After minification 163.9 kB
  • After compression 66.1 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 97.9 kB or 60% of the original size.

CSS Optimization

-11%

Potential reduce by 2.1 kB

  • Original 18.8 kB
  • After minification 18.8 kB
  • After compression 16.7 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. Vertigo.revues.org needs all CSS files to be minified and compressed as it can save up to 2.1 kB or 11% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (50%)

Requests Now

38

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 38 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 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vertigo.revues.org

vertigo.revues.org

380 ms

519 ms

common.css

common.css

95 ms

screen.css

screen.css

272 ms

main.css

main.css

545 ms

jquery.js

jquery.js

844 ms

common.min.js

common.min.js

475 ms

tarteaucitron.js

tarteaucitron.js

1357 ms

main.js

main.js

628 ms

jquery.jsonp-latest.min.js

jquery.jsonp-latest.min.js

1353 ms

glace_top.jpg

glace_top.jpg

1441 ms

twitter.png

twitter.png

581 ms

linkedin.png

linkedin.png

579 ms

google.png

google.png

618 ms

facebook.png

facebook.png

606 ms

rss.png

rss.png

1332 ms

logo-vertigo.png

logo-vertigo.png

1331 ms

logo-DOAJ-small120.png

logo-DOAJ-small120.png

1421 ms

Lg_ISE_2.5mm_3c.jpg

Lg_ISE_2.5mm_3c.jpg

1418 ms

logo_FQRSC-small100.jpg

logo_FQRSC-small100.jpg

1414 ms

logoCRSHC-small100.png

logoCRSHC-small100.png

1413 ms

logo-revues-org.png

logo-revues-org.png

1391 ms

css

css

90 ms

sitename.png

sitename.png

663 ms

widgets.png

widgets.png

693 ms

more-alt-main.png

more-alt-main.png

695 ms

more-alt.png

more-alt.png

649 ms

more.png

more.png

648 ms

breadcrumb-sep.png

breadcrumb-sep.png

643 ms

print.css

print.css

583 ms

KFOmCnqEu92Fr1Mu4mxM.woff

KFOmCnqEu92Fr1Mu4mxM.woff

683 ms

KFOlCnqEu92Fr1MmEU9fBBc-.woff

KFOlCnqEu92Fr1MmEU9fBBc-.woff

670 ms

KFOlCnqEu92Fr1MmSU5fBBc-.woff

KFOlCnqEu92Fr1MmSU5fBBc-.woff

741 ms

KFOlCnqEu92Fr1MmWUlfBBc-.woff

KFOlCnqEu92Fr1MmWUlfBBc-.woff

739 ms

pk.js

pk.js

1313 ms

langues_off.svg

langues_off.svg

920 ms

partager_off.svg

partager_off.svg

466 ms

fb_partage_off.svg

fb_partage_off.svg

461 ms

tweet_partager_off.svg

tweet_partager_off.svg

452 ms

google_partager_off.svg

google_partager_off.svg

518 ms

loupe_search_grey.svg

loupe_search_grey.svg

492 ms

tout_openedition.svg

tout_openedition.svg

481 ms

fb_off.svg

fb_off.svg

493 ms

tweet_off.svg

tweet_off.svg

565 ms

authenticate

authenticate

686 ms

Accessibility Review

vertigo.revues.org accessibility score

76

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

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

[lang] attributes do not have a valid value

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

89

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: