Tools & Wizards About Us
ville-cergy.fr screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 99

    SEO

    Google-friendlier than
    93% of websites

ville-cergy.fr

Accueil - Ville de Cergy

Page Load Speed

9.8 sec in total

First Response

271 ms

Resources Loaded

8.6 sec

Page Rendered

915 ms

ville-cergy.fr screenshot

About Website

Welcome to ville-cergy.fr homepage info - get ready to check Ville Cergy best content for France right away, or after learning these important things about ville-cergy.fr

Site officiel de la ville de Cergy. Guide pratique et interactif de la vie cergyssoise : services publics, élus, équipements, démarches administratives et visite guidée au coeur de la commune.

Visit ville-cergy.fr

Key Findings

We analyzed Ville-cergy.fr page load time and found that the first response time was 271 ms and then it took 9.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

ville-cergy.fr performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

20/100

10%

LCP (Largest Contentful Paint)

Value21.5 s

0/100

25%

SI (Speed Index)

Value8.8 s

16/100

10%

TBT (Total Blocking Time)

Value500 ms

58/100

30%

CLS (Cumulative Layout Shift)

Value0.716

7/100

15%

TTI (Time to Interactive)

Value19.1 s

3/100

10%

Network Requests Diagram

ville-cergy.fr

271 ms

1700 ms

style.css

241 ms

tarteaucitron.js

318 ms

303 ms

Our browser made a total of 81 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Ville-cergy.fr, 81% (66 requests) were made to Cergy.fr and 9% (7 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (4.1 sec) relates to the external source Cergy.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 780.5 kB (13%)

Content Size

5.8 MB

After Optimization

5.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Ville-cergy.fr main page is 5.8 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. 50% of websites need less resources to load. Images take 5.1 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 470.9 kB

  • Original 549.5 kB
  • After minification 331.2 kB
  • After compression 78.7 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 218.4 kB, which is 40% 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 470.9 kB or 86% of the original size.

Image Optimization

-6%

Potential reduce by 305.7 kB

  • Original 5.1 MB
  • After minification 4.8 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. Ville Cergy images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 3.5 kB

  • Original 143.5 kB
  • After minification 143.5 kB
  • After compression 140.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-1%

Potential reduce by 417 B

  • Original 52.2 kB
  • After minification 52.2 kB
  • After compression 51.8 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. Ville-cergy.fr has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 27 (38%)

Requests Now

71

After Optimization

44

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 71 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ville Cergy. 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

ville-cergy.fr

ville-cergy.fr

271 ms

1700 ms

style.css

style.css

241 ms

tarteaucitron.js

tarteaucitron.js

318 ms

303 ms

stratis.tarteaucitron.services.js

stratis.tarteaucitron.services.js

327 ms

controller.css

controller.css

490 ms

locallang.js

locallang.js

390 ms

jquery-1.8.2.min.js

jquery-1.8.2.min.js

557 ms

style.css

style.css

538 ms

vhs-assets-7d81124743ce7e54dcde0958c06d26ec.css

vhs-assets-7d81124743ce7e54dcde0958c06d26ec.css

554 ms

vhs-assets-601e062ce0b3dd2165883cd75ae83092.js

vhs-assets-601e062ce0b3dd2165883cd75ae83092.js

740 ms

css

css

37 ms

css

css

57 ms

css

css

57 ms

sddefault.jpg

sddefault.jpg

224 ms

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209 ms

sddefault_live.jpg

sddefault_live.jpg

1172 ms

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1170 ms

logo.png

logo.png

208 ms

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1500 ms

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1171 ms

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1247 ms

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1408 ms

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1466 ms

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1622 ms

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1635 ms

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1886 ms

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1960 ms

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2021 ms

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1893 ms

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1937 ms

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2346 ms

ico-volume.svg

ico-volume.svg

2132 ms

ico-facebook.svg

ico-facebook.svg

2173 ms

ico-facebook_gr.svg

ico-facebook_gr.svg

2196 ms

ico-youtube.svg

ico-youtube.svg

2221 ms

ico-youtube_gr.svg

ico-youtube_gr.svg

2350 ms

ico-instagram.svg

ico-instagram.svg

2411 ms

ico-instagram_gr.svg

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2433 ms

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2614 ms

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2459 ms

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2817 ms

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2729 ms

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2834 ms

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2852 ms

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3237 ms

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3007 ms

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3124 ms

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3131 ms

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3150 ms

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3090 ms

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3419 ms

logo-footer.png

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3302 ms

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48 ms

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800 ms

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882 ms

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879 ms

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880 ms

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879 ms

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880 ms

default-icons-webfont.woff

default-icons-webfont.woff

3165 ms

index.php

index.php

4076 ms

ico-fb.svg

ico-fb.svg

2293 ms

logo-white.png

logo-white.png

2554 ms

ico-instagram.svg

ico-instagram.svg

2250 ms

ico-yt.svg

ico-yt.svg

2235 ms

ico-in.svg

ico-in.svg

2203 ms

ico-email.svg

ico-email.svg

2148 ms

ico-mob.svg

ico-mob.svg

2261 ms

bg-decor-06.png

bg-decor-06.png

2280 ms

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2136 ms

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2104 ms

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2171 ms

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2114 ms

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2137 ms

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2106 ms

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2178 ms

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2241 ms

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2153 ms

print.css

print.css

331 ms

Accessibility Review

ville-cergy.fr accessibility score

91

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 IDs are not unique

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

Links do not have a discernible name

Best Practices

ville-cergy.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

High

Page has valid source maps

SEO Factors

ville-cergy.fr SEO score

99

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 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 Ville-cergy.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 Ville-cergy.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

ville-cergy.fr

Open Graph description is not detected on the main page of Ville Cergy. 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: