Report Summary

  • 73

    Performance

    Renders faster than
    83% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 70% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

sudoku.ru

Судоку онлайн - играй в судоку бесплатно на сайте Sudoku.ru

Page Load Speed

1.4 sec in total

First Response

544 ms

Resources Loaded

706 ms

Page Rendered

104 ms

sudoku.ru screenshot

About Website

Visit sudoku.ru now to see the best up-to-date Sudoku content and also check out these interesting facts you probably never knew about sudoku.ru

Играйте бесплатно в Судоку онлайн на сайте Sudoku.ru. Начните с легкого уровня сложности и дойдите до уровня Эксперт. Игра Судоку на нашем сайте совместима со всеми распространенными браузерами и типа...

Visit sudoku.ru

Key Findings

We analyzed Sudoku.ru page load time and found that the first response time was 544 ms and then it took 810 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

sudoku.ru performance score

73

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value2.7 s

85/100

25%

SI (Speed Index)

Value4.0 s

80/100

10%

TBT (Total Blocking Time)

Value640 ms

47/100

30%

CLS (Cumulative Layout Shift)

Value0.046

99/100

15%

TTI (Time to Interactive)

Value4.3 s

84/100

10%

Network Requests Diagram

sudoku.ru

544 ms

style.css

8 ms

skenzo.css

9 ms

quickdomainfwd.com

158 ms

jquery-2.1.4.min.js

12 ms

Our browser made a total of 5 requests to load all elements on the main page. We found that 20% of them (1 request) were addressed to the original Sudoku.ru, 60% (3 requests) were made to D32ffatx74qnju.cloudfront.net and 20% (1 request) were made to Quickdomainfwd.com. The less responsive or slowest element that took the longest time to load (544 ms) belongs to the original domain Sudoku.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 55.9 kB (65%)

Content Size

86.6 kB

After Optimization

30.7 kB

In fact, the total size of Sudoku.ru main page is 86.6 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Javascripts take 84.3 kB which makes up the majority of the site volume.

HTML Optimization

-47%

Potential reduce by 510 B

  • Original 1.1 kB
  • After minification 1.0 kB
  • After compression 568 B

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 510 B or 47% of the original size.

JavaScript Optimization

-65%

Potential reduce by 54.6 kB

  • Original 84.3 kB
  • After minification 84.3 kB
  • After compression 29.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 54.6 kB or 65% of the original size.

CSS Optimization

-61%

Potential reduce by 718 B

  • Original 1.2 kB
  • After minification 962 B
  • After compression 456 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. Sudoku.ru needs all CSS files to be minified and compressed as it can save up to 718 B or 61% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

4

After Optimization

4

The browser has sent 4 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sudoku. According to our analytics all requests are already optimized.

Accessibility Review

sudoku.ru accessibility score

88

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

Buttons do not have an accessible name

Best Practices

sudoku.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

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

sudoku.ru SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

    N/A

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sudoku.ru can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is English. Our system also found out that Sudoku.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

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