8 sec in total
1.3 sec
6.3 sec
331 ms
Welcome to book.ru homepage info - get ready to check BOOK best content for Russia right away, or after learning these important things about book.ru
Электронно-библиотечная система BOOK.RU более 10 лет служит незаменимым интеллектуальным помощником для преподавателей, аспирантов, студентов, научных работников. В состав базовой коллекции включены у...
Visit book.ruWe analyzed Book.ru page load time and found that the first response time was 1.3 sec and then it took 6.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
book.ru performance score
name
value
score
weighting
Value3.3 s
39/100
10%
Value7.0 s
6/100
25%
Value9.4 s
12/100
10%
Value3,900 ms
1/100
30%
Value0.028
100/100
15%
Value11.3 s
19/100
10%
1310 ms
1393 ms
270 ms
265 ms
258 ms
Our browser made a total of 61 requests to load all elements on the main page. We found that 87% of them (53 requests) were addressed to the original Book.ru, 5% (3 requests) were made to Mc.yandex.ru and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (2.9 sec) relates to the external source Knorus.ru.
Page size can be reduced by 367.5 kB (49%)
745.2 kB
377.8 kB
In fact, the total size of Book.ru main page is 745.2 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. 30% of websites need less resources to load. Images take 253.3 kB which makes up the majority of the site volume.
Potential reduce by 41.4 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. This page needs HTML code to be minified as it can gain 6.7 kB, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 41.4 kB or 80% of the original size.
Potential reduce by 6.7 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 images are well optimized though.
Potential reduce by 143.8 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 143.8 kB or 61% of the original size.
Potential reduce by 175.7 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. Book.ru needs all CSS files to be minified and compressed as it can save up to 175.7 kB or 86% of the original size.
Number of requests can be reduced by 37 (64%)
58
21
The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of BOOK. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
book.ru
1310 ms
www.book.ru
1393 ms
bootstrap.css
270 ms
bootstrap-theme.css
265 ms
style.css
258 ms
layout.css
269 ms
accordion.css
267 ms
paginator3000.css
264 ms
imgareaselect.css
384 ms
simplemodal.css
392 ms
ddaccordion.js
385 ms
jquery.js
642 ms
paginator3000.js
391 ms
jquery.imgareaselect.min.js
388 ms
jquery.simplemodal.min.js
511 ms
global.js
511 ms
feedback.js
515 ms
switch.css
516 ms
analytics.js
48 ms
bezlimit.png
2942 ms
program_diplom.gif
1161 ms
tail-top.gif
137 ms
logo.gif
136 ms
bn-ebs-vkr.jpg
265 ms
918900.jpg
258 ms
918551.jpg
135 ms
918538.jpg
258 ms
918086.jpg
391 ms
917953.jpg
391 ms
917230.jpg
260 ms
916691.jpg
512 ms
916583.jpg
387 ms
916540.jpg
389 ms
916536.jpg
392 ms
916605.jpg
1113 ms
914460.jpg
518 ms
watch.js
696 ms
header-tail.gif
506 ms
nav-bg.png
507 ms
border-right.gif
507 ms
border-bot.gif
628 ms
marker-1.png
635 ms
border-top.gif
603 ms
border.gif
605 ms
marker-9.gif
606 ms
border-top2.gif
1234 ms
border-bot1.gif
730 ms
left-top-corner3.gif
731 ms
right-top-corner2.gif
732 ms
right-bot-corner2.gif
733 ms
left-bot-corner2.gif
858 ms
border-top1.gif
859 ms
left-top-corner2.gif
859 ms
right-top-corner1.gif
860 ms
right-bot-corner1.gif
985 ms
left-bot-corner1.gif
986 ms
glyphicons-halflings-regular.woff
1112 ms
115813
165 ms
collect
26 ms
advert.gif
114 ms
1
115 ms
book.ru accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-hidden="true"] elements contain focusable descendents
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
[id] attributes on active, focusable elements are not unique
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
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
Links do not have a discernible name
book.ru best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
book.ru SEO score
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
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Book.ru can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it does not match the claimed English language. Our system also found out that Book.ru 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.ru
Open Graph description is not detected on the main page of BOOK. 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: