Access history.drofa-ventana.ru. Линия УМК И. Л. Андреева, О. В. Волобуева. История (6-10) – издательство Дрофа – Вентана-граф

history.drofa-ventana.ru screenshot

17

Performance

Renders faster than
33% of other websites
81

Accessibility

Visual factors better than
that of 52% of websites
67

Best Practices

More advanced features
available than in
24% of websites
89

SEO

Google-friendlier than
67% of websites

First Response

627 ms

Resources Loaded

3.7 sec

Page Rendered

5 sec

history.drofa-ventana.ru screenshot

About Website

Welcome to history.drofa-ventana.ru homepage info - get ready to check History Drofa Ventana best content for Russia right away, or after learning these important things about history.drofa-ventana.ru

На сайте объединенной издательской группы Дрофа – Вентана-граф представлена подробная информация о серии Линия УМК И. Л. Андреева, О. В. Волобуева. История (6-10): все компоненты, описание, видео, мет...

Visit history.drofa-ventana.ru

Key Findings

We analyzed History.drofa-ventana.ru page load time and found that the first response time was 627 ms and then it took 8.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

name

value

score

weighting

FCP (First Contentful Paint)

Value5.2 s

8/100

10%

LCP (Largest Contentful Paint)

Value7.5 s

4/100

25%

SI (Speed Index)

Value16.3 s

0/100

10%

TBT (Total Blocking Time)

Value14,250 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.013

100/100

15%

TTI (Time to Interactive)

Value25.5 s

0/100

10%

history.drofa-ventana.ru

627 ms

history.rosuchebnik.ru

723 ms

kernel_main.css

541 ms

kernel_socialservices.css

541 ms

template_a69f9e5ec1b6bad2f1ee413bb2cee886.css

541 ms

Our browser made a total of 166 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original History.drofa-ventana.ru, 63% (104 requests) were made to Cdn.rosuchebnik.ru and 21% (35 requests) were made to Rosuchebnik.ru. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source Cdn.rosuchebnik.ru.

Content Size

328.2 kB

After Optimization

148.2 kB

In fact, the total size of History.drofa-ventana.ru main page is 328.2 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. 25% of websites need less resources to load. HTML takes 202.4 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 179.2 kB

Original 202.4 kB
After minification 164.4 kB
After compression 23.2 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 38.0 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 179.2 kB or 89% of the original size.

JavaScript Optimization

-0%

Potential reduce by 266 B

Original 125.1 kB
After minification 125.1 kB
After compression 124.8 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. This website has mostly compressed JavaScripts.

CSS Optimization

-75%

Potential reduce by 568 B

Original 756 B
After minification 689 B
After compression 188 B

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. History.drofa-ventana.ru needs all CSS files to be minified and compressed as it can save up to 568 B or 75% of the original size.

Requests Now

18

After Optimization

10

The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of History Drofa Ventana. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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 keyboard navigation in your application.

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

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

High

Displays images with incorrect aspect ratio

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

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

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 History.drofa-ventana.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 History.drofa-ventana.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

history.drofa-ventana.ru

Open Graph description is not detected on the main page of History Drofa Ventana. 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: