Tools & Wizards About Us
tetrab.ru screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

tetrab.ru

Ответы к рабочим тетрадям по всем предметам для 1-11 классов

Page Load Speed

5 sec in total

First Response

659 ms

Resources Loaded

4.1 sec

Page Rendered

220 ms

tetrab.ru screenshot

About Website

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

Ответы к рабочим тетрадям для 1-11 классов по биологии, истории, английскому языку, географии и другим предметам.

Visit tetrab.ru

Key Findings

We analyzed Tetrab.ru page load time and found that the first response time was 659 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

tetrab.ru performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

34/100

25%

SI (Speed Index)

Value7.5 s

27/100

10%

TBT (Total Blocking Time)

Value1,360 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.146

77/100

15%

TTI (Time to Interactive)

Value11.6 s

18/100

10%

Network Requests Diagram

tetrab.ru

659 ms

zcode11.me

323 ms

style.css

188 ms

openapi.js

341 ms

context.js

1020 ms

Our browser made a total of 90 requests to load all elements on the main page. We found that 14% of them (13 requests) were addressed to the original Tetrab.ru, 52% (47 requests) were made to St6-21.vk.com and 9% (8 requests) were made to Vk.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source St6-21.vk.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 433.1 kB (15%)

Content Size

2.9 MB

After Optimization

2.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tetrab.ru main page is 2.9 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. 60% of websites need less resources to load. Javascripts take 2.3 MB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 10.2 kB

  • Original 14.9 kB
  • After minification 14.0 kB
  • After compression 4.7 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 10.2 kB or 68% of the original size.

Image Optimization

-19%

Potential reduce by 23.0 kB

  • Original 124.3 kB
  • After minification 101.3 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. Obviously, Tetrab needs image optimization as it can save up to 23.0 kB or 19% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-14%

Potential reduce by 326.0 kB

  • Original 2.3 MB
  • After minification 2.3 MB
  • After compression 1.9 MB

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 326.0 kB or 14% of the original size.

CSS Optimization

-14%

Potential reduce by 73.9 kB

  • Original 533.4 kB
  • After minification 533.4 kB
  • After compression 459.6 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. Tetrab.ru needs all CSS files to be minified and compressed as it can save up to 73.9 kB or 14% of the original size.

Requests Breakdown

Number of requests can be reduced by 68 (79%)

Requests Now

86

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 86 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tetrab. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 47 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

tetrab.ru

tetrab.ru

659 ms

zcode11.me

zcode11.me

323 ms

style.css

style.css

188 ms

openapi.js

openapi.js

341 ms

context.js

context.js

1020 ms

jquery-1.10.1.min.js

jquery-1.10.1.min.js

413 ms

main.js

main.js

358 ms

jquery.mousewheel-3.0.6.pack.js

jquery.mousewheel-3.0.6.pack.js

279 ms

jquery.fancybox.js

jquery.fancybox.js

284 ms

jquery.fancybox.css

jquery.fancybox.css

282 ms

openapi.c340c125c61ec5745ebb2a98626e46ab.js

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312 ms

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openapi.c340c125c61ec5745ebb2a98626e46ab.js

251 ms

fon.png

fon.png

407 ms

3_0_FFFFFFFF_EFEFEFFF_0_pageviews

3_0_FFFFFFFF_EFEFEFFF_0_pageviews

660 ms

logo5.png

logo5.png

278 ms

Boy.jpg

Boy.jpg

281 ms

relap.js

relap.js

813 ms

nice.png

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142 ms

ice.png

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140 ms

connect.js

connect.js

658 ms

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271 ms

upload.gif

upload.gif

127 ms

widget_community.php

widget_community.php

218 ms

top100.js

top100.js

513 ms

tag.js

tag.js

924 ms

hit

hit

301 ms

loader_nav212013039911_3.js

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291 ms

fonts_cnt.c7a76efe.css

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880 ms

lite.c9bfd4eb.css

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664 ms

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299 ms

polyfills.c3a1b892.js

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622 ms

vkui.acd59e29.css

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791 ms

xdm.js

xdm.js

546 ms

ui_common.963f8bc1.css

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644 ms

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826 ms

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997 ms

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1128 ms

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1273 ms

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1111 ms

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1196 ms

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1224 ms

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likes.43d06ff5.css

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1361 ms

audioplayer-lib.85b39ca5.css

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1362 ms

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1375 ms

react.84cfd9aa.js

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1399 ms

state-management.60b70a9c.js

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1431 ms

hit

hit

557 ms

lite.f8081c5724ea3c8f7503758696b1108c.js

lite.f8081c5724ea3c8f7503758696b1108c.js

411 ms

dk

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community.640eed5d.css

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623 ms

base.28bbffbf.css

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architecture-mobx.cb627586.js

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791 ms

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128 ms

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480 ms

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upload.gif

upload.gif

90 ms

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1

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133 ms

Accessibility Review

tetrab.ru accessibility score

73

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

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

tetrab.ru best practices score

67

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

tetrab.ru SEO score

100

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

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 Tetrab.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 Tetrab.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

tetrab.ru

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