2.5 sec in total
300 ms
2.1 sec
142 ms
Visit revisionscience.com now to see the best up-to-date Revision Science content for United Kingdom and also check out these interesting facts you probably never knew about revisionscience.com
The science revision site. Revision Science provides free GCSE and A-Level Biology, Chemistry and Physics revision resources.
Visit revisionscience.comWe analyzed Revisionscience.com page load time and found that the first response time was 300 ms and then it took 2.2 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.
revisionscience.com performance score
name
value
score
weighting
Value5.1 s
8/100
10%
Value8.0 s
2/100
25%
Value7.6 s
25/100
10%
Value390 ms
68/100
30%
Value0.869
4/100
15%
Value10.2 s
25/100
10%
300 ms
537 ms
95 ms
188 ms
278 ms
Our browser made a total of 97 requests to load all elements on the main page. We found that 42% of them (41 requests) were addressed to the original Revisionscience.com, 8% (8 requests) were made to Googleads.g.doubleclick.net and 8% (8 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (557 ms) belongs to the original domain Revisionscience.com.
Page size can be reduced by 930.1 kB (55%)
1.7 MB
762.0 kB
In fact, the total size of Revisionscience.com main page is 1.7 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. 50% of websites need less resources to load. Javascripts take 1.1 MB which makes up the majority of the site volume.
Potential reduce by 49.2 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 49.2 kB or 69% of the original size.
Potential reduce by 51.6 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. Obviously, Revision Science needs image optimization as it can save up to 51.6 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 695.8 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 695.8 kB or 64% of the original size.
Potential reduce by 133.4 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. Revisionscience.com needs all CSS files to be minified and compressed as it can save up to 133.4 kB or 84% of the original size.
Number of requests can be reduced by 56 (65%)
86
30
The browser has sent 86 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Revision Science. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 35 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.
revisionscience.com
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revisionscience.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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
<input type="image"> elements do not have [alt] text
Links do not have a discernible name
revisionscience.com 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
Page has valid source maps
revisionscience.com 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
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Revisionscience.com 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 Revisionscience.com 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.
revisionscience.com
Open Graph description is not detected on the main page of Revision Science. 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: