Tools & Wizards About Us
aldebaran.cz screenshot

Report Summary

  • 76

    Performance

    Renders faster than
    84% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

aldebaran.cz

Aldebaran homepage

Page Load Speed

3.1 sec in total

First Response

627 ms

Resources Loaded

2.4 sec

Page Rendered

107 ms

aldebaran.cz screenshot

About Website

Welcome to aldebaran.cz homepage info - get ready to check Aldebaran best content for Czech Republic right away, or after learning these important things about aldebaran.cz

Server věnovaný fyzice a astronomii

Visit aldebaran.cz

Key Findings

We analyzed Aldebaran.cz page load time and found that the first response time was 627 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

aldebaran.cz performance score

76

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

40/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

55/100

25%

SI (Speed Index)

Value4.0 s

81/100

10%

TBT (Total Blocking Time)

Value160 ms

93/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.4 s

71/100

10%

Network Requests Diagram

aldebaran.cz

627 ms

aldebaran.cz

430 ms

www.aldebaran.cz

456 ms

aldebaran.css

107 ms

ald_layout.css

106 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 88% of them (23 requests) were addressed to the original Aldebaran.cz, 8% (2 requests) were made to Google-analytics.com and 4% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (627 ms) belongs to the original domain Aldebaran.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 16.1 kB (11%)

Content Size

146.0 kB

After Optimization

129.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Aldebaran.cz main page is 146.0 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. Images take 111.0 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 8.4 kB

  • Original 11.4 kB
  • After minification 10.3 kB
  • After compression 3.0 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 8.4 kB or 74% of the original size.

Image Optimization

-6%

Potential reduce by 7.2 kB

  • Original 111.0 kB
  • After minification 103.8 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. Aldebaran images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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

-20%

Potential reduce by 499 B

  • Original 2.5 kB
  • After minification 2.5 kB
  • After compression 2.0 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. Aldebaran.cz needs all CSS files to be minified and compressed as it can save up to 499 B or 20% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

23

After Optimization

23

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Aldebaran. According to our analytics all requests are already optimized.

Network Requests Diagram

aldebaran.cz

aldebaran.cz

627 ms

aldebaran.cz

aldebaran.cz

430 ms

www.aldebaran.cz

www.aldebaran.cz

456 ms

aldebaran.css

aldebaran.css

107 ms

ald_layout.css

ald_layout.css

106 ms

ald_menu.css

ald_menu.css

211 ms

analytics.js

analytics.js

38 ms

ald_small_a.gif

ald_small_a.gif

109 ms

bg_block.gif

bg_block.gif

237 ms

ru_1.gif

ru_1.gif

235 ms

logo-w.png

logo-w.png

327 ms

logo-3.png

logo-3.png

445 ms

Kitz_100.png

Kitz_100.png

343 ms

logo.gif

logo.gif

342 ms

2023_CERN_logo.gif

2023_CERN_logo.gif

340 ms

logo.png

logo.png

343 ms

Astro_175.png

Astro_175.png

428 ms

skoky.jpg

skoky.jpg

444 ms

iter.jpg

iter.jpg

549 ms

hpm_175.jpg

hpm_175.jpg

551 ms

basket_th2.jpg

basket_th2.jpg

451 ms

poweredby.gif

poweredby.gif

528 ms

search_th.png

search_th.png

549 ms

ru_2.gif

ru_2.gif

547 ms

collect

collect

14 ms

js

js

72 ms

Accessibility Review

aldebaran.cz accessibility score

75

Accessibility Issues

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

Form elements do not have associated labels

Best Practices

aldebaran.cz best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

aldebaran.cz SEO score

77

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Aldebaran.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Aldebaran.cz 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

aldebaran.cz

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