Tools & Wizards About Us
codewars.com screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

codewars.com

Codewars - Achieve mastery through coding practice and developer mentorship

Page Load Speed

2.7 sec in total

First Response

20 ms

Resources Loaded

691 ms

Page Rendered

2 sec

codewars.com screenshot

About Website

Click here to check amazing Codewars content for United States. Otherwise, check out these important facts you probably never knew about codewars.com

A coding practice website for all programming levels – Join a community of over 3 million developers and improve your coding skills in over 55 programming languages!

Visit codewars.com

Key Findings

We analyzed Codewars.com page load time and found that the first response time was 20 ms and then it took 2.7 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

codewars.com performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

10/100

25%

SI (Speed Index)

Value4.5 s

73/100

10%

TBT (Total Blocking Time)

Value620 ms

48/100

30%

CLS (Cumulative Layout Shift)

Value0.11

87/100

15%

TTI (Time to Interactive)

Value9.7 s

29/100

10%

Network Requests Diagram

codewars.com

20 ms

codewars.com

33 ms

www.codewars.com

223 ms

codewars-v2-d2efab82dd354f6f58b6e48d120.f9693ed1d.css

48 ms

webfont.js

43 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 8% of them (3 requests) were addressed to the original Codewars.com, 49% (18 requests) were made to Cdn.prod.website-files.com and 14% (5 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (240 ms) relates to the external source Cdn.prod.website-files.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 636.7 kB (9%)

Content Size

7.0 MB

After Optimization

6.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Codewars.com main page is 7.0 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. 65% of websites need less resources to load. Images take 6.7 MB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 89.6 kB

  • Original 124.5 kB
  • After minification 124.5 kB
  • After compression 34.9 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. 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 89.6 kB or 72% of the original size.

Image Optimization

-8%

Potential reduce by 544.8 kB

  • Original 6.7 MB
  • After minification 6.2 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. Codewars images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 826 B

  • Original 112.3 kB
  • After minification 112.3 kB
  • After compression 111.5 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

-6%

Potential reduce by 1.4 kB

  • Original 22.3 kB
  • After minification 22.3 kB
  • After compression 20.9 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. Codewars.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 7 (27%)

Requests Now

26

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Codewars. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

codewars.com

codewars.com

20 ms

codewars.com

codewars.com

33 ms

www.codewars.com

www.codewars.com

223 ms

codewars-v2-d2efab82dd354f6f58b6e48d120.f9693ed1d.css

codewars-v2-d2efab82dd354f6f58b6e48d120.f9693ed1d.css

48 ms

webfont.js

webfont.js

43 ms

js

js

87 ms

script.js

script.js

41 ms

optimize.js

optimize.js

86 ms

jquery-3.5.1.min.dc5e7f18c8.js

jquery-3.5.1.min.dc5e7f18c8.js

41 ms

codewars-v2-d2efab82dd354f6f58b6e48d120.145aae56c.js

codewars-v2-d2efab82dd354f6f58b6e48d120.145aae56c.js

55 ms

css

css

49 ms

hotjar-1661672.js

hotjar-1661672.js

210 ms

6674f0cdb5b7b401612cf065_noise-50.png

6674f0cdb5b7b401612cf065_noise-50.png

133 ms

6674f0cdb5b7b401612cf0ee_codewars-by-andela-dark.svg

6674f0cdb5b7b401612cf0ee_codewars-by-andela-dark.svg

113 ms

6674f0cdb5b7b401612cf09b_orange-red-gradient-background.png

6674f0cdb5b7b401612cf09b_orange-red-gradient-background.png

113 ms

6674f0cdb5b7b401612cf0e8_next-challenge-3.png

6674f0cdb5b7b401612cf0e8_next-challenge-3.png

123 ms

6674f0cdb5b7b401612cf0ed_Training_on_Unique_In_Order___Codewars.jpg

6674f0cdb5b7b401612cf0ed_Training_on_Unique_In_Order___Codewars.jpg

124 ms

6674f0cdb5b7b401612cf06b_ranks.png

6674f0cdb5b7b401612cf06b_ranks.png

119 ms

6674f0cdb5b7b401612cf094_hex-globe.png

6674f0cdb5b7b401612cf094_hex-globe.png

170 ms

6674f0cdb5b7b401612cf095_create-kata.png

6674f0cdb5b7b401612cf095_create-kata.png

128 ms

6674f0cdb5b7b401612cf098_XcDq5TCM_400x400.jpeg

6674f0cdb5b7b401612cf098_XcDq5TCM_400x400.jpeg

123 ms

6674f0cdb5b7b401612cf097_molly.jpeg

6674f0cdb5b7b401612cf097_molly.jpeg

172 ms

6674f0cdb5b7b401612cf2aa_CW%20Blog%20post%20headings%20%20(3).png

6674f0cdb5b7b401612cf2aa_CW%20Blog%20post%20headings%20%20(3).png

187 ms

6674f0cdb5b7b401612cf2a2_pop%20art%20profile.png

6674f0cdb5b7b401612cf2a2_pop%20art%20profile.png

240 ms

6674f0cdb5b7b401612cf2a8_CW%20Blog%20post%20headings%20THUMBNAIL%20%20(800%20x%20800%20px).png

6674f0cdb5b7b401612cf2a8_CW%20Blog%20post%20headings%20THUMBNAIL%20%20(800%20x%20800%20px).png

186 ms

6674f0cdb5b7b401612cf2a4_CW%20Blog%20post%20headings%20.png

6674f0cdb5b7b401612cf2a4_CW%20Blog%20post%20headings%20.png

173 ms

6674f0cdb5b7b401612cf0f1_qualified-full-color-white.svg

6674f0cdb5b7b401612cf0f1_qualified-full-color-white.svg

188 ms

6674f0cdb5b7b401612cf067_codewars-logomark.svg

6674f0cdb5b7b401612cf067_codewars-logomark.svg

206 ms

6674f0cdb5b7b401612cf06c_Input%20Sans%20Light.woff

6674f0cdb5b7b401612cf06c_Input%20Sans%20Light.woff

111 ms

6674f0cdb5b7b401612cf092_Input%20Sans%20Regular.woff

6674f0cdb5b7b401612cf092_Input%20Sans%20Regular.woff

143 ms

6674f0cdb5b7b401612cf090_Input%20Sans%20Medium.woff

6674f0cdb5b7b401612cf090_Input%20Sans%20Medium.woff

164 ms

zYX9KVElMYYaJe8bpLHnCwDKjXr8AIFscQ.ttf

zYX9KVElMYYaJe8bpLHnCwDKjXr8AIFscQ.ttf

23 ms

zYXgKVElMYYaJe8bpLHnCwDKhdHeEA.ttf

zYXgKVElMYYaJe8bpLHnCwDKhdHeEA.ttf

50 ms

zYX9KVElMYYaJe8bpLHnCwDKjSL9AIFscQ.ttf

zYX9KVElMYYaJe8bpLHnCwDKjSL9AIFscQ.ttf

77 ms

zYX9KVElMYYaJe8bpLHnCwDKjQ76AIFscQ.ttf

zYX9KVElMYYaJe8bpLHnCwDKjQ76AIFscQ.ttf

79 ms

zYX9KVElMYYaJe8bpLHnCwDKjWr7AIFscQ.ttf

zYX9KVElMYYaJe8bpLHnCwDKjWr7AIFscQ.ttf

78 ms

modules.e4b2dc39f985f11fb1e4.js

modules.e4b2dc39f985f11fb1e4.js

53 ms

Accessibility Review

codewars.com accessibility score

96

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

codewars.com best practices score

92

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

SEO Factors

codewars.com SEO score

90

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

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Codewars.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Codewars.com 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

codewars.com

Open Graph data is detected on the main page of Codewars. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: