4.4 sec in total
442 ms
3.8 sec
178 ms
Welcome to dobre-knihy.cz homepage info - get ready to check Dobre Knihy best content for Czech Republic right away, or after learning these important things about dobre-knihy.cz
Kniha,knihy i knižní novinky v online knihkupectví Dobré Knihy. Dobré knihy a levné knihy i knižní novinky v našem knihkupectví online.
Visit dobre-knihy.czWe analyzed Dobre-knihy.cz page load time and found that the first response time was 442 ms and then it took 3.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
dobre-knihy.cz performance score
name
value
score
weighting
Value7.0 s
1/100
10%
Value9.3 s
1/100
25%
Value12.6 s
3/100
10%
Value1,180 ms
21/100
30%
Value0.04
99/100
15%
Value22.5 s
1/100
10%
442 ms
1230 ms
345 ms
373 ms
11 ms
Our browser made a total of 94 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Dobre-knihy.cz, 29% (27 requests) were made to Pimages.dcdn.cz and 23% (22 requests) were made to Static.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Dobre-knihy.cz.
Page size can be reduced by 139.7 kB (8%)
1.7 MB
1.5 MB
In fact, the total size of Dobre-knihy.cz main page is 1.7 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. CSS take 660.5 kB which makes up the majority of the site volume.
Potential reduce by 80.5 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 80.5 kB or 82% of the original size.
Potential reduce by 57.4 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. Obviously, Dobre Knihy needs image optimization as it can save up to 57.4 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 1.7 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.
Potential reduce by 47 B
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. Dobre-knihy.cz has all CSS files already compressed.
Number of requests can be reduced by 44 (49%)
89
45
The browser has sent 89 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dobre Knihy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 41 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
dobre-knihy.cz
442 ms
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dobre-knihy.cz accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
<frame> or <iframe> elements do not have a title
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
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
dobre-knihy.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
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
dobre-knihy.cz SEO score
CS
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dobre-knihy.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 Dobre-knihy.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.
dobre-knihy.cz
Open Graph description is not detected on the main page of Dobre Knihy. 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: