Tools & Wizards About Us
planetarium.u-strasbg.fr screenshot

Report Summary

  • 45

    Performance

    Renders faster than
    64% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

planetarium.u-strasbg.fr

Jardin des Sciences : Planétarium - Université de Strasbourg

Page Load Speed

2.8 sec in total

First Response

363 ms

Resources Loaded

2.3 sec

Page Rendered

197 ms

planetarium.u-strasbg.fr screenshot

About Website

Welcome to planetarium.u-strasbg.fr homepage info - get ready to check Planetarium U Strasbg best content for France right away, or after learning these important things about planetarium.u-strasbg.fr

Le Jardin des Sciences, mis en place depuis septembre 2008 dans le prolongement de la Mission Culture Scientifique et Technique, regroupe les actions de diffusion de la culture scientifique et techniq...

Visit planetarium.u-strasbg.fr

Key Findings

We analyzed Planetarium.u-strasbg.fr page load time and found that the first response time was 363 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

planetarium.u-strasbg.fr performance score

45

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value340 ms

74/100

30%

CLS (Cumulative Layout Shift)

Value0.217

57/100

15%

TTI (Time to Interactive)

Value7.6 s

47/100

10%

Network Requests Diagram

363 ms

473 ms

unistra-signature-full.css

108 ms

slick.css

43 ms

styles.css

214 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Planetarium.u-strasbg.fr, 10% (4 requests) were made to Typodun.unistra.fr and 5% (2 requests) were made to Cdn.jsdelivr.net. The less responsive or slowest element that took the longest time to load (523 ms) relates to the external source Typodun.unistra.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 27.5 kB (11%)

Content Size

239.5 kB

After Optimization

212.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Planetarium.u-strasbg.fr main page is 239.5 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. 30% of websites need less resources to load. Images take 129.4 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 20.5 kB

  • Original 25.4 kB
  • After minification 20.2 kB
  • After compression 5.0 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 5.2 kB, which is 21% 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 20.5 kB or 80% of the original size.

Image Optimization

-0%

Potential reduce by 449 B

  • Original 129.4 kB
  • After minification 128.9 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. Planetarium U Strasbg images are well optimized though.

JavaScript Optimization

-6%

Potential reduce by 4.5 kB

  • Original 72.9 kB
  • After minification 72.9 kB
  • After compression 68.4 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

-18%

Potential reduce by 2.1 kB

  • Original 11.8 kB
  • After minification 11.8 kB
  • After compression 9.7 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. Planetarium.u-strasbg.fr needs all CSS files to be minified and compressed as it can save up to 2.1 kB or 18% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (60%)

Requests Now

35

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Planetarium U Strasbg. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

363 ms

473 ms

unistra-signature-full.css

unistra-signature-full.css

108 ms

slick.css

slick.css

43 ms

styles.css

styles.css

214 ms

scrollup_01.css

scrollup_01.css

417 ms

stylesheet_71758cc652.css

stylesheet_71758cc652.css

304 ms

jquery.fancybox.css

jquery.fancybox.css

308 ms

swfobject.js

swfobject.js

316 ms

javascript_93077bb238.js

javascript_93077bb238.js

311 ms

font-awesome.min.css

font-awesome.min.css

36 ms

jquery.min.js

jquery.min.js

35 ms

unistra-symbol.css

unistra-symbol.css

322 ms

unistraA-font.css

unistraA-font.css

315 ms

unistra-signature.js

unistra-signature.js

421 ms

slick.min.js

slick.min.js

36 ms

jquery.anchor_02.js

jquery.anchor_02.js

523 ms

scrollup_01.js

scrollup_01.js

522 ms

jquery.mousewheel-3.0.6.pack.js

jquery.mousewheel-3.0.6.pack.js

400 ms

jquery.fancybox.js

jquery.fancybox.js

406 ms

jquery.matchHeight-min.js

jquery.matchHeight-min.js

409 ms

effects.js

effects.js

413 ms

javascript_a0d00b73eb.js

javascript_a0d00b73eb.js

413 ms

menu.css

menu.css

214 ms

ga.js

ga.js

165 ms

bg-header.jpg

bg-header.jpg

370 ms

RTEmagicC_plane_montage_2019-2.jpg.jpg

RTEmagicC_plane_montage_2019-2.jpg.jpg

265 ms

RTEmagicC_logo40.png.png

RTEmagicC_logo40.png.png

167 ms

967c467686.png

967c467686.png

170 ms

b52f1510ef.png

b52f1510ef.png

172 ms

99776ac7ed.jpg

99776ac7ed.jpg

165 ms

0f56f3faeb.jpg

0f56f3faeb.jpg

267 ms

5988327923.jpg

5988327923.jpg

270 ms

87f823b835.png

87f823b835.png

273 ms

131653dba9.jpg

131653dba9.jpg

276 ms

ca79217ff8.jpg

ca79217ff8.jpg

365 ms

UnistraA-Regular.woff

UnistraA-Regular.woff

450 ms

UnistraA-Bold.woff

UnistraA-Bold.woff

457 ms

unistrasymbol-webfont.woff

unistrasymbol-webfont.woff

351 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

20 ms

__utm.gif

__utm.gif

13 ms

Accessibility Review

planetarium.u-strasbg.fr accessibility score

80

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 input fields do not have accessible names

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.

Best Practices

planetarium.u-strasbg.fr best practices score

67

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

SEO Factors

planetarium.u-strasbg.fr SEO score

77

Search Engine Optimization Advices

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 Planetarium.u-strasbg.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 Planetarium.u-strasbg.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

planetarium.u-strasbg.fr

Open Graph description is not detected on the main page of Planetarium U Strasbg. 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: