Access semiv-velizy.fr. Semiv, agence immobilière Vélizy Villacoublay et environs de Vélizy

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value13.1 s

2/100

10%

TBT (Total Blocking Time)

Value850 ms

34/100

30%

CLS (Cumulative Layout Shift)

Value0.18

67/100

15%

TTI (Time to Interactive)

Value30.4 s

0/100

10%

www.semiv-velizy.fr

462 ms

css

88 ms

css

107 ms

css

115 ms

css

114 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 28% of them (18 requests) were addressed to the original Semiv-velizy.fr, 25% (16 requests) were made to Cdnjs.cloudflare.com and 16% (10 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Semiv-velizy.fr.

Content Size

9.9 MB

After Optimization

7.5 MB

In fact, the total size of Semiv-velizy.fr main page is 9.9 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. 65% of websites need less resources to load. Images take 9.7 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 40.7 kB

Original 50.4 kB
After minification 38.0 kB
After compression 9.7 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 12.3 kB, which is 25% 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 40.7 kB or 81% of the original size.

Image Optimization

-24%

Potential reduce by 2.4 MB

Original 9.7 MB
After minification 7.4 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. Obviously, Semiv Velizy needs image optimization as it can save up to 2.4 MB or 24% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-19%

Potential reduce by 11.9 kB

Original 64.1 kB
After minification 64.1 kB
After compression 52.2 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 11.9 kB or 19% of the original size.

CSS Optimization

-1%

Potential reduce by 489 B

Original 36.7 kB
After minification 36.7 kB
After compression 36.2 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. Semiv-velizy.fr has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Semiv Velizy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 19 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

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

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

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

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

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 doesn't use legible font sizes

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 Semiv-velizy.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 Semiv-velizy.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

semiv-velizy.fr

Open Graph description is not detected on the main page of Semiv Velizy. 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

Semiv, agence immobilière Vélizy Villacoublay et environs de Vélizy

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

www.semiv-velizy.fr

css

css

css

css

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

www.semiv-velizy.fr

css

css

css

css

jquery-ui.min.css

bootstrap.min.css

font-awesome.min.css

animate.css

css

bootstrap-select.min.css

lightgallery.css

lightslider.css

style.css

expre.css

jquery.min.js

jquery-ui.min.js

jarallax.min.js

jarallax-element.min.js

jarallax-video.min.js

popper.min.js

bootstrap.min.js

bootstrap-select.min.js

bodymovin.js

jquery.sharrre.min.js

anime.min.js

scrollMonitor.js

jquery-jvectormap.min.js

build_82876cba56a65b89242ec428be2a89e2.js

build_1de216c6d257b1ba0ec75fd7595e44d5.js

css

css

css2

css2

css2

gtm.js

photo_5c9ea19502e7ac99bf1b81dcff70ddbc.jpg

coeur.png

logoSite.png

1.jpg

agence_contact.jpg

1.jpg

2.jpg