Tools & Wizards About Us

Report Summary

  • 52

    Performance

    Renders faster than
    69% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

ndac.co.uk

The National Diving & Activity Centre (NDAC) is Closed

Page Load Speed

1.7 sec in total

First Response

171 ms

Resources Loaded

1.5 sec

Page Rendered

69 ms

About Website

Visit ndac.co.uk now to see the best up-to-date NDAC content for United Kingdom and also check out these interesting facts you probably never knew about ndac.co.uk

Notice of site closure. The National Diving & Activity Centre Chepstow Site is permanently closed. We are not taking bookings for leisure activities or public diving. We’d like to thank all our custom...

Visit ndac.co.uk

Key Findings

We analyzed Ndac.co.uk page load time and found that the first response time was 171 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

ndac.co.uk performance score

52

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value5.1 s

26/100

25%

SI (Speed Index)

Value4.5 s

73/100

10%

TBT (Total Blocking Time)

Value640 ms

46/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.7 s

68/100

10%

Network Requests Diagram

ndac.co.uk

171 ms

ndac.co.uk

367 ms

www.ndac.co.uk

343 ms

ga.js

18 ms

js

73 ms

Our browser made a total of 12 requests to load all elements on the main page. We found that 50% of them (6 requests) were addressed to the original Ndac.co.uk, 17% (2 requests) were made to Ssl.google-analytics.com and 17% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (493 ms) relates to the external source Paypal.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 9.7 kB (31%)

Content Size

31.0 kB

After Optimization

21.2 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Ndac.co.uk main page is 31.0 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 5% of websites need less resources to load. Javascripts take 18.4 kB which makes up the majority of the site volume.

HTML Optimization

-61%

Potential reduce by 3.3 kB

  • Original 5.5 kB
  • After minification 5.1 kB
  • After compression 2.2 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 3.3 kB or 61% of the original size.

JavaScript Optimization

-4%

Potential reduce by 779 B

  • Original 18.4 kB
  • After minification 18.2 kB
  • After compression 17.6 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

-79%

Potential reduce by 5.6 kB

  • Original 7.1 kB
  • After minification 6.8 kB
  • After compression 1.5 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. Ndac.co.uk needs all CSS files to be minified and compressed as it can save up to 5.6 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (56%)

Requests Now

9

After Optimization

4

  • Images
  • JavaScript
  • CSS

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NDAC. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

ndac.co.uk accessibility score

87

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.

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

ndac.co.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

ndac.co.uk SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    WINDOWS-1252

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ndac.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 Ndac.co.uk main page’s claimed encoding is windows-1252. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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