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sudoku.org.uk screenshot

Report Summary

  • 34

    Performance

    Renders faster than
    53% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

sudoku.org.uk

sudoku online.

Page Load Speed

2.2 sec in total

First Response

283 ms

Resources Loaded

1.7 sec

Page Rendered

289 ms

sudoku.org.uk screenshot

About Website

Click here to check amazing Sudoku content for Mexico. Otherwise, check out these important facts you probably never knew about sudoku.org.uk

description

Visit sudoku.org.uk

Key Findings

We analyzed Sudoku.org.uk page load time and found that the first response time was 283 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

sudoku.org.uk performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.5 s

96/100

10%

LCP (Largest Contentful Paint)

Value6.7 s

7/100

25%

SI (Speed Index)

Value5.6 s

53/100

10%

TBT (Total Blocking Time)

Value2,690 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.7 s

14/100

10%

Network Requests Diagram

sudoku.org.uk

283 ms

cm2.css

175 ms

cm2.css

165 ms

show_ads.js

69 ms

Google%20-%20Leaderboard%20(728%20x%2090).jpg

342 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 48% of them (21 requests) were addressed to the original Sudoku.org.uk, 16% (7 requests) were made to Pagead2.googlesyndication.com and 11% (5 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (602 ms) relates to the external source Googleads.g.doubleclick.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 963.7 kB (54%)

Content Size

1.8 MB

After Optimization

833.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sudoku.org.uk main page is 1.8 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. Images take 885.7 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 19.1 kB

  • Original 25.1 kB
  • After minification 22.2 kB
  • After compression 5.9 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 2.9 kB, which is 11% 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 19.1 kB or 76% of the original size.

Image Optimization

-53%

Potential reduce by 468.5 kB

  • Original 885.7 kB
  • After minification 417.2 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, Sudoku needs image optimization as it can save up to 468.5 kB or 53% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-53%

Potential reduce by 456.6 kB

  • Original 863.4 kB
  • After minification 863.4 kB
  • After compression 406.7 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 456.6 kB or 53% of the original size.

CSS Optimization

-86%

Potential reduce by 19.4 kB

  • Original 22.7 kB
  • After minification 18.8 kB
  • After compression 3.3 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. Sudoku.org.uk needs all CSS files to be minified and compressed as it can save up to 19.4 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (32%)

Requests Now

37

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sudoku. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

sudoku.org.uk

sudoku.org.uk

283 ms

cm2.css

cm2.css

175 ms

cm2.css

cm2.css

165 ms

show_ads.js

show_ads.js

69 ms

Google%20-%20Leaderboard%20(728%20x%2090).jpg

Google%20-%20Leaderboard%20(728%20x%2090).jpg

342 ms

sudokuorgnew.css

sudokuorgnew.css

113 ms

adsbygoogle.js

adsbygoogle.js

104 ms

menu1.jpg

menu1.jpg

88 ms

Header.jpg

Header.jpg

258 ms

selectedtab.png

selectedtab.png

172 ms

nonselectedtab.png

nonselectedtab.png

251 ms

MetalStrip.jpg

MetalStrip.jpg

171 ms

SudokuSolver_250x212.png

SudokuSolver_250x212.png

346 ms

sudokupic3.jpg

sudokupic3.jpg

236 ms

PenBig.jpg

PenBig.jpg

338 ms

MM.jpg

MM.jpg

333 ms

KillerHelper_250x173.png

KillerHelper_250x173.png

483 ms

Sudoku_175x175.png

Sudoku_175x175.png

425 ms

adddivider.jpg

adddivider.jpg

341 ms

Jigsaw_174x167.png

Jigsaw_174x167.png

495 ms

Killer_174x175.png

Killer_174x175.png

507 ms

Kakuro_175x175.png

Kakuro_175x175.png

441 ms

Footer2.jpg

Footer2.jpg

444 ms

ga.js

ga.js

8 ms

__utm.gif

__utm.gif

12 ms

show_ads_impl.js

show_ads_impl.js

230 ms

zrt_lookup.html

zrt_lookup.html

40 ms

ads

ads

474 ms

ads

ads

602 ms

load_preloaded_resource.js

load_preloaded_resource.js

23 ms

abg_lite.js

abg_lite.js

24 ms

s

s

5 ms

window_focus.js

window_focus.js

29 ms

qs_click_protection.js

qs_click_protection.js

33 ms

ufs_web_display.js

ufs_web_display.js

14 ms

bbcd6bf18c20baa1b2adeb195de9b551.js

bbcd6bf18c20baa1b2adeb195de9b551.js

27 ms

icon.png

icon.png

14 ms

css

css

71 ms

reactive_library.js

reactive_library.js

193 ms

ca-pub-9531665475758949

ca-pub-9531665475758949

160 ms

activeview

activeview

87 ms

WGg91BhL6Bhk3qTAPqmblqNZdzujbVjDoJfr3h8Q3EY.js

WGg91BhL6Bhk3qTAPqmblqNZdzujbVjDoJfr3h8Q3EY.js

12 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

85 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

85 ms

Accessibility Review

sudoku.org.uk accessibility score

89

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

sudoku.org.uk best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

sudoku.org.uk SEO score

67

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

Links do not have descriptive text

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sudoku.org.uk can be misinterpreted by Google and other search engines. Our service has detected that English 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 Sudoku.org.uk 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

sudoku.org.uk

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: