Report Summary

  • 72

    Performance

    Renders faster than
    82% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 89% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

shadowcat.co.uk

Shadowcat Systems Limited – Sufficiently Advanced Technology

Page Load Speed

4.1 sec in total

First Response

283 ms

Resources Loaded

3.3 sec

Page Rendered

510 ms

shadowcat.co.uk screenshot

About Website

Visit shadowcat.co.uk now to see the best up-to-date Shadowcat content and also check out these interesting facts you probably never knew about shadowcat.co.uk

Shadowcat Systems is an open source developer and software consultancy, it is the brain-child of Matt Trout and Mark Keating

Visit shadowcat.co.uk

Key Findings

We analyzed Shadowcat.co.uk page load time and found that the first response time was 283 ms and then it took 3.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

shadowcat.co.uk performance score

72

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

77/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

49/100

25%

SI (Speed Index)

Value2.7 s

97/100

10%

TBT (Total Blocking Time)

Value310 ms

78/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value8.6 s

37/100

10%

Network Requests Diagram

shadowcat.co.uk

283 ms

www.shadowcat.co.uk

278 ms

shadow.cat

1359 ms

main.css

460 ms

angular.js

72 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 6% of them (2 requests) were addressed to the original Shadowcat.co.uk, 45% (15 requests) were made to Shadow.cat and 27% (9 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Shadow.cat.

Page Optimization Overview & Recommendations

Page size can be reduced by 113.5 kB (12%)

Content Size

975.4 kB

After Optimization

861.9 kB

In fact, the total size of Shadowcat.co.uk main page is 975.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 847.5 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 22.5 kB

  • Original 29.1 kB
  • After minification 24.5 kB
  • After compression 6.6 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. This page needs HTML code to be minified as it can gain 4.6 kB, which is 16% 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 22.5 kB or 77% of the original size.

Image Optimization

-7%

Potential reduce by 55.6 kB

  • Original 847.5 kB
  • After minification 791.9 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. Shadowcat images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 1.5 kB

  • Original 58.8 kB
  • After minification 58.6 kB
  • After compression 57.3 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

-85%

Potential reduce by 33.8 kB

  • Original 40.0 kB
  • After minification 26.8 kB
  • After compression 6.1 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. Shadowcat.co.uk needs all CSS files to be minified and compressed as it can save up to 33.8 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (22%)

Requests Now

27

After Optimization

21

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Shadowcat. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

shadowcat.co.uk accessibility score

96

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.

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

shadowcat.co.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

shadowcat.co.uk 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

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 Shadowcat.co.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 Shadowcat.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

Open Graph description is not detected on the main page of Shadowcat. 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: