Tools & Wizards About Us
computerscienced.co.uk screenshot

Report Summary

  • 44

    Performance

    Renders faster than
    63% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

computerscienced.co.uk

Computer Scienced | Free Computer Science education

Page Load Speed

3.4 sec in total

First Response

213 ms

Resources Loaded

2.5 sec

Page Rendered

655 ms

computerscienced.co.uk screenshot

About Website

Click here to check amazing Computer Scienced content. Otherwise, check out these important facts you probably never knew about computerscienced.co.uk

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Key Findings

We analyzed Computerscienced.co.uk page load time and found that the first response time was 213 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

computerscienced.co.uk performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

74/100

10%

LCP (Largest Contentful Paint)

Value2.3 s

93/100

25%

SI (Speed Index)

Value7.8 s

23/100

10%

TBT (Total Blocking Time)

Value4,380 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.178

68/100

15%

TTI (Time to Interactive)

Value17.8 s

4/100

10%

Network Requests Diagram

computerscienced.co.uk

213 ms

computerscienced.co.uk

266 ms

184 ms

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13 ms

analytics.js

47 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 56% of them (44 requests) were addressed to the original Computerscienced.co.uk, 22% (17 requests) were made to and 5% (4 requests) were made to Use.fontawesome.com. The less responsive or slowest element that took the longest time to load (544 ms) belongs to the original domain Computerscienced.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 100.2 kB (9%)

Content Size

1.1 MB

After Optimization

1.0 MB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Computerscienced.co.uk main page is 1.1 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. 55% of websites need less resources to load. Javascripts take 770.1 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 98.4 kB

  • Original 128.1 kB
  • After minification 128.0 kB
  • After compression 29.6 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 98.4 kB or 77% of the original size.

JavaScript Optimization

-0%

Potential reduce by 1.7 kB

  • Original 770.1 kB
  • After minification 770.1 kB
  • After compression 768.4 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 18 B

  • Original 217.4 kB
  • After minification 217.4 kB
  • After compression 217.4 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. Computerscienced.co.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 37 (71%)

Requests Now

52

After Optimization

15

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Computer Scienced. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 38 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

computerscienced.co.uk

computerscienced.co.uk

213 ms

computerscienced.co.uk

computerscienced.co.uk

266 ms

184 ms

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Accessibility Review

computerscienced.co.uk accessibility score

90

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.

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 IDs are not unique

Best Practices

computerscienced.co.uk 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

computerscienced.co.uk SEO score

90

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 Computerscienced.co.uk 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 Computerscienced.co.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

computerscienced.co.uk

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