Tools & Wizards About Us
thedataschool.co.uk screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

thedataschool.co.uk

Data School - Creating Great Data Analysts with Tableau and Alteryx

Page Load Speed

2.1 sec in total

First Response

10 ms

Resources Loaded

947 ms

Page Rendered

1.1 sec

thedataschool.co.uk screenshot

About Website

Visit thedataschool.co.uk now to see the best up-to-date The Data School content for India and also check out these interesting facts you probably never knew about thedataschool.co.uk

After training thousands of people to use Tableau and Alteryx, we’re now creating the next generation of great data analysts. Learn more.

Visit thedataschool.co.uk

Key Findings

We analyzed Thedataschool.co.uk page load time and found that the first response time was 10 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

thedataschool.co.uk performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

12/100

10%

LCP (Largest Contentful Paint)

Value17.9 s

0/100

25%

SI (Speed Index)

Value11.9 s

4/100

10%

TBT (Total Blocking Time)

Value12,660 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.069

96/100

15%

TTI (Time to Interactive)

Value28.0 s

0/100

10%

Network Requests Diagram

thedataschool.co.uk

10 ms

thedataschool.co.uk

402 ms

createjs.min.js

548 ms

dsWelcome.js

323 ms

js

45 ms

Our browser made a total of 12 requests to load all elements on the main page. We found that 83% of them (10 requests) were addressed to the original Thedataschool.co.uk, 8% (1 request) were made to Googletagmanager.com and 8% (1 request) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (548 ms) belongs to the original domain Thedataschool.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 114.9 kB (63%)

Content Size

182.1 kB

After Optimization

67.2 kB

  • HTML
  • JavaScript

In fact, the total size of Thedataschool.co.uk main page is 182.1 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. Only 10% of websites need less resources to load. HTML takes 161.1 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 114.8 kB

  • Original 161.1 kB
  • After minification 161.1 kB
  • After compression 46.3 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 114.8 kB or 71% of the original size.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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.

Requests Breakdown

Number of requests can be reduced by 8 (80%)

Requests Now

10

After Optimization

2

  • Images
  • JavaScript

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of The Data School. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

thedataschool.co.uk

thedataschool.co.uk

10 ms

thedataschool.co.uk

thedataschool.co.uk

402 ms

createjs.min.js

createjs.min.js

548 ms

dsWelcome.js

dsWelcome.js

323 ms

js

js

45 ms

polyfill-18ef5e969a4f51663dc4.js

polyfill-18ef5e969a4f51663dc4.js

337 ms

app-6fff5b91c93f1e17ca37.js

app-6fff5b91c93f1e17ca37.js

240 ms

dc6a8720040df98778fe970bf6c000a41750d3ae-cfd190d366c1c44a4675.js

dc6a8720040df98778fe970bf6c000a41750d3ae-cfd190d366c1c44a4675.js

242 ms

framework-7a16630869772973a0b4.js

framework-7a16630869772973a0b4.js

400 ms

webpack-runtime-f07105ef66000cb7e2fc.js

webpack-runtime-f07105ef66000cb7e2fc.js

289 ms

hamburg-c49f312fef5bc304a458bba1308937bc.svg

hamburg-c49f312fef5bc304a458bba1308937bc.svg

108 ms

analytics.js

analytics.js

18 ms

Accessibility Review

thedataschool.co.uk accessibility score

77

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

thedataschool.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

thedataschool.co.uk SEO score

100

Search Engine Optimization Advices

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 Thedataschool.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 Thedataschool.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

thedataschool.co.uk

Open Graph description is not detected on the main page of The Data School. 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: