Tools & Wizards About Us

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

cleverstudents.ru

Математика на cleverstudents (ru) - теория, примеры, решения.

Page Load Speed

3.1 sec in total

First Response

601 ms

Resources Loaded

2.4 sec

Page Rendered

182 ms

About Website

Welcome to cleverstudents.ru homepage info - get ready to check Cleverstudents best content for Russia right away, or after learning these important things about cleverstudents.ru

cleverstudents (ru) - теория и практика по математике. Доступно изложенная теория по различным математическим дисциплинам, разобранные решения характерных примеров и типовых задач.

Visit cleverstudents.ru

Key Findings

We analyzed Cleverstudents.ru page load time and found that the first response time was 601 ms and then it took 2.5 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

cleverstudents.ru performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

22/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

38/100

25%

SI (Speed Index)

Value4.0 s

80/100

10%

TBT (Total Blocking Time)

Value380 ms

70/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.3 s

72/100

10%

Network Requests Diagram

cleverstudents.ru

601 ms

www.cleverstudents.ru

469 ms

js

60 ms

share.js

374 ms

style_mainpage.css

125 ms

Our browser made a total of 11 requests to load all elements on the main page. We found that 45% of them (5 requests) were addressed to the original Cleverstudents.ru, 27% (3 requests) were made to Counter.yadro.ru and 9% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (813 ms) relates to the external source Mc.yandex.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 89.1 kB (44%)

Content Size

200.6 kB

After Optimization

111.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cleverstudents.ru main page is 200.6 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. Only 10% of websites need less resources to load. HTML takes 108.6 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 88.8 kB

  • Original 108.6 kB
  • After minification 108.2 kB
  • After compression 19.7 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 88.8 kB or 82% of the original size.

Image Optimization

-1%

Potential reduce by 55 B

  • Original 5.5 kB
  • After minification 5.5 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. Cleverstudents images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 85.2 kB
  • After minification 85.2 kB
  • After compression 85.2 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

-17%

Potential reduce by 239 B

  • Original 1.4 kB
  • After minification 1.4 kB
  • After compression 1.1 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. Cleverstudents.ru needs all CSS files to be minified and compressed as it can save up to 239 B or 17% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

7

After Optimization

7

  • Images
  • JavaScript
  • CSS

The browser has sent 7 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cleverstudents. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

cleverstudents.ru accessibility score

83

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Links do not have a discernible name

Best Practices

cleverstudents.ru best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Page has valid source maps

SEO Factors

cleverstudents.ru SEO score

97

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

    N/A

  • Encoding

    WINDOWS-1251

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cleverstudents.ru 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 Cleverstudents.ru main page’s claimed encoding is windows-1251. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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