Tools & Wizards About Us
luz.fr screenshot

Report Summary

  • 46

    Performance

    Renders faster than
    64% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

luz.fr

LUZ, centrale indépendante de référencement, de paiement et de services pour opticiens et audioprothésistes indépendants.

Page Load Speed

4.6 sec in total

First Response

1.3 sec

Resources Loaded

2.9 sec

Page Rendered

473 ms

luz.fr screenshot

About Website

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

LUZ : 1ère centrale, dirigée par des opticiens toujours en exercice. 5 domaines d'expertise : optique lunetterie, audioprothèse, centrale d'achat, animation de réseaux, édition de logiciels métiers po...

Visit luz.fr

Key Findings

We analyzed Luz.fr page load time and found that the first response time was 1.3 sec and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

luz.fr performance score

46

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value7.5 s

4/100

25%

SI (Speed Index)

Value5.8 s

49/100

10%

TBT (Total Blocking Time)

Value210 ms

89/100

30%

CLS (Cumulative Layout Shift)

Value0.412

24/100

15%

TTI (Time to Interactive)

Value7.3 s

49/100

10%

Network Requests Diagram

www.luz.fr

1252 ms

_search-results.min.css

124 ms

_swiper.min.css

259 ms

module_87977270746_search-input.min.css

359 ms

module_87977270714_buttons.min.css

362 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 81% of them (22 requests) were addressed to the original Luz.fr, 7% (2 requests) were made to Analytics-eu.clickdimensions.com and 4% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Luz.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 116.3 kB (73%)

Content Size

158.3 kB

After Optimization

42.0 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Luz.fr main page is 158.3 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. 20% of websites need less resources to load. HTML takes 110.7 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 96.8 kB

  • Original 110.7 kB
  • After minification 94.2 kB
  • After compression 13.9 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 16.5 kB, which is 15% 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 96.8 kB or 87% of the original size.

JavaScript Optimization

-47%

Potential reduce by 18.5 kB

  • Original 39.0 kB
  • After minification 39.0 kB
  • After compression 20.5 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 18.5 kB or 47% of the original size.

CSS Optimization

-12%

Potential reduce by 1.0 kB

  • Original 8.6 kB
  • After minification 8.6 kB
  • After compression 7.6 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. Luz.fr needs all CSS files to be minified and compressed as it can save up to 1.0 kB or 12% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (85%)

Requests Now

26

After Optimization

4

  • Images
  • JavaScript
  • CSS

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of LUZ. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.luz.fr

www.luz.fr

1252 ms

_search-results.min.css

_search-results.min.css

124 ms

_swiper.min.css

_swiper.min.css

259 ms

module_87977270746_search-input.min.css

module_87977270746_search-input.min.css

359 ms

module_87977270714_buttons.min.css

module_87977270714_buttons.min.css

362 ms

module_87977270724_custom-rich-text-buttons.min.css

module_87977270724_custom-rich-text-buttons.min.css

390 ms

module_87977270730_features.min.css

module_87977270730_features.min.css

467 ms

module_87977155290_boxes.min.css

module_87977155290_boxes.min.css

468 ms

module_87977270728_features-banner.min.css

module_87977270728_features-banner.min.css

572 ms

module_87977270749_social-follow.min.css

module_87977270749_social-follow.min.css

510 ms

js

js

111 ms

embed.js

embed.js

57 ms

project.js

project.js

538 ms

main.min.js

main.min.js

618 ms

swiper.min.js

swiper.min.js

620 ms

initInformationsCarousels.min.js

initInformationsCarousels.min.js

621 ms

initMenus.min.js

initMenus.min.js

840 ms

module_87977270741_menu.min.js

module_87977270741_menu.min.js

749 ms

module_87977270746_search-input.min.js

module_87977270746_search-input.min.js

689 ms

initAnchors.min.js

initAnchors.min.js

698 ms

initCarousels.min.js

initCarousels.min.js

727 ms

27058459.js

27058459.js

1227 ms

index.js

index.js

823 ms

ts.js

ts.js

450 ms

HEADER_HOME-4.webp

HEADER_HOME-4.webp

482 ms

methodology-carousel-bg.svg

methodology-carousel-bg.svg

263 ms

tsr.js

tsr.js

171 ms

Accessibility Review

luz.fr accessibility score

88

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

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

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.

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

Tables and lists

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

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

luz.fr best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

luz.fr SEO score

100

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

Language and Encoding

  • Language Detected

    FR

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Luz.fr can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and it does not match the claimed English language. Our system also found out that Luz.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

luz.fr

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