Tools & Wizards About Us
dz-online.ru screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 42

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

dz-online.ru

Информационно-образовательный портал для всей семьи

Page Load Speed

19.3 sec in total

First Response

7 sec

Resources Loaded

11.6 sec

Page Rendered

790 ms

dz-online.ru screenshot

About Website

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

Как не оставить школьника без задания на дом? Как не забыть о нужной информации для завтрашнего открытого урока? Как быстро связаться с учителем? Как быть в курсе последних событий школы? Информационн...

Visit dz-online.ru

Key Findings

We analyzed Dz-online.ru page load time and found that the first response time was 7 sec and then it took 12.4 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

dz-online.ru performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

54/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

54/100

25%

SI (Speed Index)

Value22.5 s

0/100

10%

TBT (Total Blocking Time)

Value2,700 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.55

13/100

15%

TTI (Time to Interactive)

Value57.0 s

0/100

10%

Network Requests Diagram

dz-online.ru

6954 ms

style.css

279 ms

jquery-1.8.3.min.js

421 ms

jquery.stepy.css

294 ms

jquery.stepy.min.js

286 ms

Our browser made a total of 193 requests to load all elements on the main page. We found that 52% of them (101 requests) were addressed to the original Dz-online.ru, 16% (31 requests) were made to I.okcdn.ru and 4% (8 requests) were made to Vk.com. The less responsive or slowest element that took the longest time to load (7 sec) belongs to the original domain Dz-online.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 973.4 kB (7%)

Content Size

13.3 MB

After Optimization

12.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dz-online.ru main page is 13.3 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 12.2 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 328.9 kB

  • Original 387.8 kB
  • After minification 280.0 kB
  • After compression 58.8 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 107.8 kB, which is 28% 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 328.9 kB or 85% of the original size.

Image Optimization

-5%

Potential reduce by 576.8 kB

  • Original 12.2 MB
  • After minification 11.6 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. Dz Online images are well optimized though.

JavaScript Optimization

-12%

Potential reduce by 42.3 kB

  • Original 359.0 kB
  • After minification 359.0 kB
  • After compression 316.6 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 42.3 kB or 12% of the original size.

CSS Optimization

-7%

Potential reduce by 25.3 kB

  • Original 342.7 kB
  • After minification 342.7 kB
  • After compression 317.4 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. Dz-online.ru has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 54 (33%)

Requests Now

163

After Optimization

109

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 163 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dz 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 29 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dz-online.ru

dz-online.ru

6954 ms

style.css

style.css

279 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

421 ms

jquery.stepy.css

jquery.stepy.css

294 ms

jquery.stepy.min.js

jquery.stepy.min.js

286 ms

jquery.validate.min.js

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297 ms

domo.js

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431 ms

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432 ms

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449 ms

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440 ms

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443 ms

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373 ms

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6 ms

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22 ms

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270 ms

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271 ms

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247 ms

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40 ms

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12 ms

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525 ms

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674 ms

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352 ms

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1392 ms

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493 ms

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385 ms

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153 ms

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1291 ms

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375 ms

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482 ms

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724 ms

lite.6d09ff63.css

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508 ms

lang3_2.js

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389 ms

c3d11fba.093082a5.js

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386 ms

base.c26e5b58.css

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134 ms

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137 ms

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90 ms

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642 ms

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143 ms

Accessibility Review

dz-online.ru accessibility score

79

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

ARIA

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.

Impact

Issue

High

ARIA IDs are not unique

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

dz-online.ru best practices score

42

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

dz-online.ru SEO score

69

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

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 Dz-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 Dz-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

dz-online.ru

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