6.5 sec in total
1.1 sec
4 sec
1.4 sec
Click here to check amazing Astronomie content for Czech Republic. Otherwise, check out these important facts you probably never knew about astronomie.cz
Visit astronomie.czWe analyzed Astronomie.cz page load time and found that the first response time was 1.1 sec and then it took 5.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
astronomie.cz performance score
name
value
score
weighting
Value3.8 s
27/100
10%
Value4.0 s
50/100
25%
Value14.8 s
1/100
10%
Value90 ms
99/100
30%
Value0.195
63/100
15%
Value6.6 s
57/100
10%
1102 ms
234 ms
233 ms
234 ms
236 ms
Our browser made a total of 103 requests to load all elements on the main page. We found that 60% of them (62 requests) were addressed to the original Astronomie.cz, 24% (25 requests) were made to Static.xx.fbcdn.net and 5% (5 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Astronomie.cz.
Page size can be reduced by 237.2 kB (19%)
1.3 MB
1.0 MB
In fact, the total size of Astronomie.cz main page is 1.3 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. 60% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.
Potential reduce by 70.5 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 70.5 kB or 77% of the original size.
Potential reduce by 91.3 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. Astronomie images are well optimized though.
Potential reduce by 48.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 48.7 kB or 53% of the original size.
Potential reduce by 26.7 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. Astronomie.cz needs all CSS files to be minified and compressed as it can save up to 26.7 kB or 87% of the original size.
Number of requests can be reduced by 52 (51%)
102
50
The browser has sent 102 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Astronomie. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.
www.astronomie.cz
1102 ms
polls-css.css
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postratings-css.css
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pagenavi-css.css
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colorbox.css
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download-css.css
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jquery.js
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jquery.colorbox-min.js
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polls-js.js
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code
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style.css
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controls.png
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astronomie.cz accessibility score
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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Form elements do not have associated labels
Links do not have a discernible name
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
astronomie.cz best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
astronomie.cz SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
CS
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Astronomie.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Astronomie.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.
astronomie.cz
Open Graph description is not detected on the main page of Astronomie. 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: