5.1 sec in total
366 ms
4.3 sec
476 ms
Click here to check amazing Cbdb content for Czech Republic. Otherwise, check out these important facts you probably never knew about cbdb.cz
CBDB.cz - Databáze knih. Životopisy autorů a jejich díla. Rozsáhlá knižní databáze.
Visit cbdb.czWe analyzed Cbdb.cz page load time and found that the first response time was 366 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
cbdb.cz performance score
name
value
score
weighting
Value3.7 s
29/100
10%
Value8.3 s
2/100
25%
Value7.2 s
29/100
10%
Value2,500 ms
4/100
30%
Value0.24
52/100
15%
Value19.7 s
2/100
10%
366 ms
608 ms
273 ms
253 ms
258 ms
Our browser made a total of 118 requests to load all elements on the main page. We found that 92% of them (108 requests) were addressed to the original Cbdb.cz, 3% (4 requests) were made to Themes.googleusercontent.com and 2% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Cbdb.cz.
Page size can be reduced by 435.1 kB (28%)
1.6 MB
1.1 MB
In fact, the total size of Cbdb.cz main page is 1.6 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 1.1 MB which makes up the majority of the site volume.
Potential reduce by 35.3 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 35.3 kB or 74% of the original size.
Potential reduce by 71.0 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. Cbdb images are well optimized though.
Potential reduce by 101.2 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 101.2 kB or 70% of the original size.
Potential reduce by 227.6 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. Cbdb.cz needs all CSS files to be minified and compressed as it can save up to 227.6 kB or 87% of the original size.
Number of requests can be reduced by 28 (25%)
112
84
The browser has sent 112 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cbdb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
cbdb.cz
366 ms
www.cbdb.cz
608 ms
styles.css
273 ms
layout.css
253 ms
components.css
258 ms
jquery-latest.min.js
6 ms
smartbanner.js
256 ms
main.js
261 ms
notifications.js
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font-awesome.min.css
369 ms
golden-forms.css
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index.js
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extended.js
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analytics.js
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account_line.png
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top_cs_lang_active.png
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logo.png
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1074 ms
cbdb.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
Image elements do not have [alt] attributes
Links do not have a discernible name
cbdb.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
Missing source maps for large first-party JavaScript
cbdb.cz SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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
Document uses legible font sizes
CS
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cbdb.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 Cbdb.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.
cbdb.cz
Open Graph description is not detected on the main page of Cbdb. 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: