3.7 sec in total
489 ms
2.9 sec
284 ms
Visit book-online.com.ua now to see the best up-to-date Book Online content for Russia and also check out these interesting facts you probably never knew about book-online.com.ua
Электронная библиотека book-online.com.ua - Большой выбор книг. Художественная, учебная, деловая литература, справочники. Читайте бесплатно и без регистрации
Visit book-online.com.uaWe analyzed Book-online.com.ua page load time and found that the first response time was 489 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
book-online.com.ua performance score
name
value
score
weighting
Value2.0 s
84/100
10%
Value2.3 s
93/100
25%
Value2.2 s
99/100
10%
Value90 ms
98/100
30%
Value0
100/100
15%
Value5.2 s
75/100
10%
489 ms
286 ms
492 ms
685 ms
330 ms
Our browser made a total of 85 requests to load all elements on the main page. We found that 53% of them (45 requests) were addressed to the original Book-online.com.ua, 8% (7 requests) were made to Apis.google.com and 7% (6 requests) were made to Directadvert.ru. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Book-online.com.ua.
Page size can be reduced by 332.2 kB (49%)
684.1 kB
351.8 kB
In fact, the total size of Book-online.com.ua main page is 684.1 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. 40% of websites need less resources to load. Javascripts take 358.1 kB which makes up the majority of the site volume.
Potential reduce by 59.1 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 59.1 kB or 82% of the original size.
Potential reduce by 13.6 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. Book Online images are well optimized though.
Potential reduce by 245.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 245.9 kB or 69% of the original size.
Potential reduce by 13.6 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. Book-online.com.ua needs all CSS files to be minified and compressed as it can save up to 13.6 kB or 84% of the original size.
Number of requests can be reduced by 37 (46%)
80
43
The browser has sent 80 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Book Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and as a result speed up the page load time.
book-online.com.ua
489 ms
style.css
286 ms
jquery-1.4.min.js
492 ms
jquery-ui.min.js
685 ms
function.js
330 ms
share.js
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top100.jcn
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show.cgi
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top100.scn
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ga.js
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cb=gapi.loaded_0
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top_m.jpg
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book-online.com.ua 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.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
book-online.com.ua 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
Page has valid source maps
book-online.com.ua SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
Tap targets are not sized appropriately
RU
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Book-online.com.ua can be misinterpreted by Google and other search engines. Our service has detected that Russian 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 Book-online.com.ua 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.
book-online.com.ua
Open Graph description is not detected on the main page of Book Online. 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: