Report Summary

  • 93

    Performance

    Renders faster than
    93% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

book-online.com.ua

Читать книги онлайн бесплатно и без регистрации. Электронная библиотека book-online.com.ua

Page Load Speed

3.7 sec in total

First Response

489 ms

Resources Loaded

2.9 sec

Page Rendered

284 ms

book-online.com.ua screenshot

About Website

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.ua

Key Findings

We 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 50% of websites can load faster.

Performance Metrics

book-online.com.ua performance score

93

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value2.3 s

93/100

25%

SI (Speed Index)

Value2.2 s

99/100

10%

TBT (Total Blocking Time)

Value90 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.2 s

75/100

10%

Network Requests Diagram

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

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 Optimization Overview & Recommendations

Page size can be reduced by 332.2 kB (49%)

Content Size

684.1 kB

After Optimization

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.

HTML Optimization

-82%

Potential reduce by 59.1 kB

  • Original 72.2 kB
  • After minification 66.7 kB
  • After compression 13.0 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.

Image Optimization

-6%

Potential reduce by 13.6 kB

  • Original 237.6 kB
  • After minification 224.0 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. Book Online images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 245.9 kB

  • Original 358.1 kB
  • After minification 349.1 kB
  • After compression 112.1 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.

CSS Optimization

-84%

Potential reduce by 13.6 kB

  • Original 16.2 kB
  • After minification 12.6 kB
  • After compression 2.7 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-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.

Requests Breakdown

Number of requests can be reduced by 37 (46%)

Requests Now

80

After Optimization

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.

Accessibility Review

book-online.com.ua accessibility score

82

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

book-online.com.ua best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

book-online.com.ua SEO score

82

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    RU

  • Language Claimed

    N/A

  • Encoding

    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.

Social Sharing Optimization

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: