Access biblio-online.ru. Образовательная платформа Юрайт. Для вузов и ссузов.

name

value

score

weighting

FCP (First Contentful Paint)

Value7.0 s

1/100

10%

LCP (Largest Contentful Paint)

Value13.1 s

0/100

25%

SI (Speed Index)

Value19.9 s

0/100

10%

TBT (Total Blocking Time)

Value4,570 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value29.1 s

0/100

10%

biblio-online.ru

402 ms

urait.ru

1359 ms

bvi.min.css

365 ms

css

48 ms

style.css

631 ms

Our browser made a total of 63 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Biblio-online.ru, 73% (46 requests) were made to Urait.ru and 8% (5 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Urait.ru.

Content Size

1.1 MB

After Optimization

815.3 kB

In fact, the total size of Biblio-online.ru main page is 1.1 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. 70% of websites need less resources to load. Images take 379.7 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 240.0 kB

Original 342.6 kB
After minification 277.4 kB
After compression 102.6 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 65.2 kB, which is 19% 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 240.0 kB or 70% of the original size.

Image Optimization

-4%

Potential reduce by 14.2 kB

Original 379.7 kB
After minification 365.5 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. Biblio Online images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 2.0 kB

Original 245.8 kB
After minification 245.8 kB
After compression 243.7 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

-33%

Potential reduce by 50.5 kB

Original 154.0 kB
After minification 115.1 kB
After compression 103.5 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. Biblio-online.ru needs all CSS files to be minified and compressed as it can save up to 50.5 kB or 33% of the original size.

Requests Now

After Optimization

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Biblio 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 22 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

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

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.

High

ARIA IDs are not unique

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

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 Biblio-online.ru 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 Biblio-online.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.

Social Sharing Optimization

biblio-online.ru

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Образовательная платформа Юрайт. Для вузов и ссузов.

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

biblio-online.ru

urait.ru

bvi.min.css

css

style.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

biblio-online.ru

urait.ru

bvi.min.css

css

style.css

vendor.css

ut-font.css

app.css

manifest.js

vendor.js

common.js

jquery.form.min.js

bootstrap.min.js

jquery.noty.packaged.min.js

book-list.js

design.js

old-google_analytics.js

events.js

optimize.js

api.js

catalog.js

catalog-loger.js

donate-book.css

jquery.bxslider.min.js

donate-book.js

vmClQbDcwX

bvi.min.js

analytics.js

gtm.js

recaptcha__ru.js

logo_206x56.svg

active-users-minus.svg

notify-close.svg

line-chart.png

video.svg

chevron_right_24px_black.svg

arrow_forward_24px_white.svg

arrow_forward_24px_dark.svg

mobile-google-play.svg

mobile-app-store.svg

books.svg

courses.svg

quiz.svg