5.2 sec in total
59 ms
1.3 sec
3.8 sec
Visit airdefence.org now to see the best up-to-date Air Defence content and also check out these interesting facts you probably never knew about airdefence.org
A Pictorial History of United Kingdom Air defence systems in the 20th Century. It describes a century of advancing technology in Aircraft,radar systems,data gathering and battle management .
Visit airdefence.orgWe analyzed Airdefence.org page load time and found that the first response time was 59 ms and then it took 5.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
airdefence.org performance score
name
value
score
weighting
Value3.3 s
39/100
10%
Value7.1 s
6/100
25%
Value3.3 s
90/100
10%
Value180 ms
91/100
30%
Value0.041
99/100
15%
Value6.4 s
60/100
10%
59 ms
127 ms
29 ms
39 ms
34 ms
Our browser made a total of 110 requests to load all elements on the main page. We found that 94% of them (103 requests) were addressed to the original Airdefence.org, 2% (2 requests) were made to Ajax.googleapis.com and 1% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (420 ms) belongs to the original domain Airdefence.org.
Page size can be reduced by 582.9 kB (10%)
5.7 MB
5.1 MB
In fact, the total size of Airdefence.org main page is 5.7 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 5.3 MB which makes up the majority of the site volume.
Potential reduce by 166.7 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 166.7 kB or 79% of the original size.
Potential reduce by 370.7 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. Air Defence images are well optimized though.
Potential reduce by 44.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 44.8 kB or 33% of the original size.
Potential reduce by 695 B
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. Airdefence.org needs all CSS files to be minified and compressed as it can save up to 695 B or 15% of the original size.
Number of requests can be reduced by 10 (9%)
107
97
The browser has sent 107 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Air Defence. 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 from 5 to 1 for CSS and as a result speed up the page load time.
airdefence.org
59 ms
www.airdefence.org
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reset.css
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less.build.css
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webfont.js
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css
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jquery.min.js
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flyoutmenu.css
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airdefence.org accessibility score
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
[role] values are not valid
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
<html> element does not have a [lang] attribute
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
Image elements do not have [alt] attributes
airdefence.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
airdefence.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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
Document uses legible font sizes
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Airdefence.org 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 Airdefence.org 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.
airdefence.org
Open Graph description is not detected on the main page of Air Defence. 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: