Tools & Wizards About Us

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

polytech.univ-nantes.fr

Devenez ingénieur avec Polytech Nantes - Polytech Nantes - Ecole d'ingénieurs

Page Load Speed

6.9 sec in total

First Response

570 ms

Resources Loaded

5.6 sec

Page Rendered

749 ms

About Website

Visit polytech.univ-nantes.fr now to see the best up-to-date Polytech Univ Nantes content for France and also check out these interesting facts you probably never knew about polytech.univ-nantes.fr

Composante de Nantes Université, Polytech Nantes est la première école polytechnique universitaire. Située sur 3 campus, elle délivre des diplômes d'ingénieurs habilités par la CTI dans 10 spécial...

Visit polytech.univ-nantes.fr

Key Findings

We analyzed Polytech.univ-nantes.fr page load time and found that the first response time was 570 ms and then it took 6.3 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

polytech.univ-nantes.fr performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value27.8 s

0/100

25%

SI (Speed Index)

Value9.4 s

12/100

10%

TBT (Total Blocking Time)

Value4,540 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.028

100/100

15%

TTI (Time to Interactive)

Value16.6 s

5/100

10%

Network Requests Diagram

polytech.univ-nantes.fr

570 ms

db299ce59b61ec5f70e3659bba547fcf5ded590a.css

354 ms

e74d38d32cf9e49681b3ffcfb1568b2a9c11ddf7.css

551 ms

7d2bde2be433fed2f5cc6d522c2842afa67ccb0b.css

258 ms

3e2a2a5ede328e3de915256cc57ee61179a8cad1.js

451 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 75% of them (53 requests) were addressed to the original Polytech.univ-nantes.fr, 11% (8 requests) were made to Youtube.com and 6% (4 requests) were made to Jnn-pa.googleapis.com. The less responsive or slowest element that took the longest time to load (3.6 sec) belongs to the original domain Polytech.univ-nantes.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 861.9 kB (8%)

Content Size

11.2 MB

After Optimization

10.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Polytech.univ-nantes.fr main page is 11.2 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 10.8 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 195.6 kB

  • Original 218.6 kB
  • After minification 162.0 kB
  • After compression 23.0 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 56.7 kB, which is 26% 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 195.6 kB or 89% of the original size.

Image Optimization

-6%

Potential reduce by 663.5 kB

  • Original 10.8 MB
  • After minification 10.1 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. Polytech Univ Nantes images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 2.8 kB

  • Original 166.6 kB
  • After minification 166.5 kB
  • After compression 163.7 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

-0%

Potential reduce by 0 B

  • Original 59.3 kB
  • After minification 59.3 kB
  • After compression 59.3 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. Polytech.univ-nantes.fr has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 15 (25%)

Requests Now

60

After Optimization

45

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Polytech Univ Nantes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

polytech.univ-nantes.fr accessibility score

79

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

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

polytech.univ-nantes.fr best practices score

75

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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

polytech.univ-nantes.fr SEO score

93

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

    FR

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Polytech.univ-nantes.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 Polytech.univ-nantes.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

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