Report Summary

  • 40

    Performance

    Renders faster than
    60% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 88

    SEO

    Google-friendlier than
    66% of websites

coollib.net

КулЛиб - Классная библиотека, скачать книги, читать онлайн fb2

Page Load Speed

3.2 sec in total

First Response

358 ms

Resources Loaded

2.1 sec

Page Rendered

782 ms

coollib.net screenshot

About Website

Visit coollib.net now to see the best up-to-date Coollib content for Russia and also check out these interesting facts you probably never knew about coollib.net

CoolLib.net ( КулЛиб ) - Классная библиотека! Много книг. Все книги можно скачать и прочитать бесплатно и без регистрации. Самиздат (СИ). Любительский перевод (ЛП). Фанфики, бестселлеры, топ книг. Чит...

Visit coollib.net

Key Findings

We analyzed Coollib.net page load time and found that the first response time was 358 ms and then it took 2.9 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

coollib.net performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

88/100

10%

LCP (Largest Contentful Paint)

Value7.0 s

6/100

25%

SI (Speed Index)

Value6.4 s

41/100

10%

TBT (Total Blocking Time)

Value980 ms

28/100

30%

CLS (Cumulative Layout Shift)

Value0.089

92/100

15%

TTI (Time to Interactive)

Value9.4 s

31/100

10%

Network Requests Diagram

coollib.net

358 ms

codefilter.css

171 ms

css_c95bf16ac9e4756af7a853e7367a02c3.css

262 ms

js_caa8285cae15cdffec37da51a8b9d89c.jsmin.js

482 ms

adsbygoogle.js

5 ms

Our browser made a total of 81 requests to load all elements on the main page. We found that 20% of them (16 requests) were addressed to the original Coollib.net, 20% (16 requests) were made to Ftp.coollib.net and 16% (13 requests) were made to Vk.com. The less responsive or slowest element that took the longest time to load (538 ms) relates to the external source Vk.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 418.8 kB (47%)

Content Size

884.4 kB

After Optimization

465.6 kB

In fact, the total size of Coollib.net main page is 884.4 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. 55% of websites need less resources to load. Javascripts take 441.9 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 60.9 kB

  • Original 83.3 kB
  • After minification 81.8 kB
  • After compression 22.4 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. 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 60.9 kB or 73% of the original size.

Image Optimization

-5%

Potential reduce by 12.5 kB

  • Original 270.5 kB
  • After minification 258.0 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. Coollib images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 274.4 kB

  • Original 441.9 kB
  • After minification 383.3 kB
  • After compression 167.6 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 274.4 kB or 62% of the original size.

CSS Optimization

-80%

Potential reduce by 71.1 kB

  • Original 88.6 kB
  • After minification 80.4 kB
  • After compression 17.6 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. Coollib.net needs all CSS files to be minified and compressed as it can save up to 71.1 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 33 (44%)

Requests Now

75

After Optimization

42

The browser has sent 75 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coollib. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

coollib.net accessibility score

95

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

Best Practices

coollib.net 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

SEO Factors

coollib.net SEO score

88

Search Engine Optimization Advices

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

    RU

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Coollib.net can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that Coollib.net 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 Coollib. 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: