Report Summary

  • 5

    Performance

    Renders faster than
    20% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 39% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

codechef.org

CodeChef: Practical coding for everyone

Page Load Speed

2.8 sec in total

First Response

114 ms

Resources Loaded

2.4 sec

Page Rendered

289 ms

codechef.org screenshot

About Website

Welcome to codechef.org homepage info - get ready to check Code Chef best content right away, or after learning these important things about codechef.org

Learn to code for free using our beginner friendly and interactive learning courses. Get all the practical skills required to excel at computer science. Start learning with CodeChef today and unlock y...

Visit codechef.org

Key Findings

We analyzed Codechef.org page load time and found that the first response time was 114 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

codechef.org performance score

5

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.2 s

3/100

10%

LCP (Largest Contentful Paint)

Value7.4 s

4/100

25%

SI (Speed Index)

Value10.8 s

6/100

10%

TBT (Total Blocking Time)

Value14,880 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.433

22/100

15%

TTI (Time to Interactive)

Value25.5 s

0/100

10%

Network Requests Diagram

codechef.org

114 ms

codechef.com

11 ms

www.codechef.com

23 ms

www.codechef.com

115 ms

css_b8c79b8aa8ae82c8b92acc57703c2dcb.css

12 ms

Our browser made a total of 132 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Codechef.org, 44% (58 requests) were made to Codechef.com and 24% (32 requests) were made to S3.amazonaws.com. The less responsive or slowest element that took the longest time to load (667 ms) relates to the external source Scontent.xx.fbcdn.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 576.2 kB (41%)

Content Size

1.4 MB

After Optimization

818.7 kB

In fact, the total size of Codechef.org main page is 1.4 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. 45% of websites need less resources to load. Images take 922.4 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 65.3 kB

  • Original 82.9 kB
  • After minification 79.0 kB
  • After compression 17.6 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 65.3 kB or 79% of the original size.

Image Optimization

-25%

Potential reduce by 231.0 kB

  • Original 922.4 kB
  • After minification 691.4 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, Code Chef needs image optimization as it can save up to 231.0 kB or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-69%

Potential reduce by 190.2 kB

  • Original 277.6 kB
  • After minification 277.3 kB
  • After compression 87.4 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 190.2 kB or 69% of the original size.

CSS Optimization

-80%

Potential reduce by 89.6 kB

  • Original 112.0 kB
  • After minification 112.0 kB
  • After compression 22.4 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. Codechef.org needs all CSS files to be minified and compressed as it can save up to 89.6 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 48 (53%)

Requests Now

91

After Optimization

43

The browser has sent 91 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Code Chef. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 32 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

codechef.org accessibility score

73

Accessibility Issues

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-*] attributes do not match their roles

High

[aria-hidden="true"] elements contain focusable descendents

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.

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

codechef.org 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

High

Missing source maps for large first-party JavaScript

SEO Factors

codechef.org SEO score

86

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

High

Image elements do not have [alt] attributes

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Codechef.org 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 Codechef.org 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 Code Chef. 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: