Tools & Wizards About Us

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

code-knowledge.com

Code Knowledge: Learn programming in Java - Learn Java and Python for free

Page Load Speed

6.1 sec in total

First Response

377 ms

Resources Loaded

5.3 sec

Page Rendered

470 ms

About Website

Visit code-knowledge.com now to see the best up-to-date Code Knowledge content and also check out these interesting facts you probably never knew about code-knowledge.com

Learn how to program in Java! Code-Knowledge is the website for those who want to learn programming in a simple and fun way!

Visit code-knowledge.com

Key Findings

We analyzed Code-knowledge.com page load time and found that the first response time was 377 ms and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

code-knowledge.com performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

37/100

25%

SI (Speed Index)

Value10.1 s

9/100

10%

TBT (Total Blocking Time)

Value2,160 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value17.2 s

4/100

10%

Network Requests Diagram

code-knowledge.com

377 ms

code-knowledge.com

711 ms

wp-emoji-release.min.js

201 ms

style.min.css

317 ms

index.css

333 ms

Our browser made a total of 130 requests to load all elements on the main page. We found that 81% of them (105 requests) were addressed to the original Code-knowledge.com, 8% (11 requests) were made to Codebean.se and 5% (7 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (3 sec) belongs to the original domain Code-knowledge.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 338.3 kB (14%)

Content Size

2.4 MB

After Optimization

2.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Code-knowledge.com main page is 2.4 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. 70% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 119.4 kB

  • Original 141.3 kB
  • After minification 138.7 kB
  • After compression 21.9 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 119.4 kB or 85% of the original size.

Image Optimization

-14%

Potential reduce by 173.8 kB

  • Original 1.3 MB
  • After minification 1.1 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. Obviously, Code Knowledge needs image optimization as it can save up to 173.8 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 15.1 kB

  • Original 646.9 kB
  • After minification 645.7 kB
  • After compression 631.8 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

-9%

Potential reduce by 30.0 kB

  • Original 333.8 kB
  • After minification 333.4 kB
  • After compression 303.8 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. Code-knowledge.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 96 (79%)

Requests Now

121

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 121 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Code Knowledge. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 67 to 1 for JavaScripts and from 31 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

code-knowledge.com accessibility score

78

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

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

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

code-knowledge.com 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

High

Page has valid source maps

SEO Factors

code-knowledge.com SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Code-knowledge.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 Code-knowledge.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

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