Tools & Wizards About Us
rubook.org screenshot

Report Summary

  • 33

    Performance

    Renders faster than
    53% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

rubook.org

Электронная библиотека :: Читать книги онлайн

Page Load Speed

9.9 sec in total

First Response

305 ms

Resources Loaded

6.3 sec

Page Rendered

3.2 sec

rubook.org screenshot

About Website

Welcome to rubook.org homepage info - get ready to check Rubook best content for Russia right away, or after learning these important things about rubook.org

Приветствуем Вас в нашей онлайн библиотеке. В библиотеке представлены различные жанры: проза, фантастика, детектив и многое другое.

Visit rubook.org

Key Findings

We analyzed Rubook.org page load time and found that the first response time was 305 ms and then it took 9.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

rubook.org performance score

33

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

9/100

25%

SI (Speed Index)

Value5.4 s

56/100

10%

TBT (Total Blocking Time)

Value1,340 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value9.5 s

30/100

10%

Network Requests Diagram

rubook.org

305 ms

lyasse.ru

1246 ms

app.js

587 ms

swiper-bundle.min.js

46 ms

css

62 ms

Our browser made a total of 146 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Rubook.org, 72% (105 requests) were made to Lyasse.ru and 14% (21 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (3.1 sec) relates to the external source Lyasse.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.8 MB (12%)

Content Size

14.5 MB

After Optimization

12.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rubook.org main page is 14.5 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. Only a small number of websites need less resources to load. Images take 14.2 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 180.5 kB

  • Original 202.6 kB
  • After minification 150.3 kB
  • After compression 22.0 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. This page needs HTML code to be minified as it can gain 52.3 kB, which is 26% 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 180.5 kB or 89% of the original size.

Image Optimization

-11%

Potential reduce by 1.6 MB

  • Original 14.2 MB
  • After minification 12.6 MB

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, Rubook needs image optimization as it can save up to 1.6 MB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 15 B

  • Original 89.5 kB
  • After minification 89.5 kB
  • After compression 89.4 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.

CSS Optimization

-16%

Potential reduce by 524 B

  • Original 3.3 kB
  • After minification 3.3 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. Rubook.org needs all CSS files to be minified and compressed as it can save up to 524 B or 16% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (12%)

Requests Now

122

After Optimization

107

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 122 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rubook. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

rubook.org

rubook.org

305 ms

lyasse.ru

lyasse.ru

1246 ms

app.js

app.js

587 ms

swiper-bundle.min.js

swiper-bundle.min.js

46 ms

css

css

62 ms

css2

css2

82 ms

css2

css2

86 ms

css2

css2

85 ms

swiper-bundle.min.css

swiper-bundle.min.css

47 ms

bootstrap.min.css

bootstrap.min.css

49 ms

bootstrap.bundle.min.js

bootstrap.bundle.min.js

59 ms

site.css

site.css

390 ms

e5b8335da0.js

e5b8335da0.js

89 ms

jquery-3.6.0.min.js

jquery-3.6.0.min.js

47 ms

star-rating.min.css

star-rating.min.css

59 ms

theme.css

theme.css

71 ms

star-rating.min.js

star-rating.min.js

73 ms

theme.js

theme.js

74 ms

ru.js

ru.js

91 ms

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tag.js

tag.js

940 ms

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCuM70w-Y3tco5q6.ttf

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCuM70w-Y3tco5q6.ttf

28 ms

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82 ms

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106 ms

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106 ms

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111 ms

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110 ms

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110 ms

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109 ms

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtr6Uw-Y3tco5q6.ttf

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109 ms

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177 ms

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111 ms

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177 ms

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176 ms

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110 ms

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176 ms

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178 ms

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179 ms

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advert.gif

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sync_cookie_image_decide

146 ms

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Accessibility Review

rubook.org accessibility score

85

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.

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

rubook.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

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

rubook.org SEO score

85

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    RU

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rubook.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Russian language. Our system also found out that Rubook.org 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

rubook.org

Open Graph description is not detected on the main page of Rubook. 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: