3.5 sec in total
268 ms
3 sec
204 ms
Click here to check amazing Sainsbury S Energy content for United Kingdom. Otherwise, check out these important facts you probably never knew about sainsburysenergy.com
Sainsbury's Energy supplies gas and electricity to the UK and are committed to helping our customers save money on your energy bills.
Visit sainsburysenergy.comWe analyzed Sainsburysenergy.com page load time and found that the first response time was 268 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
sainsburysenergy.com performance score
name
value
score
weighting
Value4.1 s
22/100
10%
Value8.4 s
2/100
25%
Value5.8 s
49/100
10%
Value430 ms
64/100
30%
Value0.151
75/100
15%
Value6.1 s
63/100
10%
268 ms
467 ms
167 ms
420 ms
336 ms
Our browser made a total of 82 requests to load all elements on the main page. We found that 79% of them (65 requests) were addressed to the original Sainsburysenergy.com, 4% (3 requests) were made to Service.maxymiser.net and 4% (3 requests) were made to S.btstatic.com. The less responsive or slowest element that took the longest time to load (751 ms) belongs to the original domain Sainsburysenergy.com.
Page size can be reduced by 1.2 MB (71%)
1.7 MB
484.3 kB
In fact, the total size of Sainsburysenergy.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 1.2 MB which makes up the majority of the site volume.
Potential reduce by 76.5 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 28.4 kB, which is 32% 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 76.5 kB or 86% of the original size.
Potential reduce by 17.4 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, Sainsbury S Energy needs image optimization as it can save up to 17.4 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 862.0 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 862.0 kB or 74% of the original size.
Potential reduce by 249.9 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. Sainsburysenergy.com needs all CSS files to be minified and compressed as it can save up to 249.9 kB or 81% of the original size.
Number of requests can be reduced by 55 (71%)
78
23
The browser has sent 78 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sainsbury S Energy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 45 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
sainsburysenergy.com
268 ms
www.sainsburysenergy.com
467 ms
librarymanager.js
167 ms
desktop.css
420 ms
desktop.css
336 ms
desktopCustom.css
270 ms
modernizr-2.0.6.js
276 ms
jquery-1.5.1.min.js
499 ms
superfish.js
267 ms
jquery-1.11.1.min.js
547 ms
jquery.selectric.min.js
358 ms
mmcore.js
30 ms
segmentation.segment.js
363 ms
testandtarget.js
375 ms
jquery-ui-1.8.11.custom.min.js
646 ms
bg_jcarousellite_1.0.2.pack.js
374 ms
jquery-search.js
432 ms
jquery-autocomplete.js
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jquery-csv.js
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bg_jquery.lightbox.pack.js
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jquery.flexslider.js
585 ms
responsive-tables.js
499 ms
jquery.easytabs.min.js
549 ms
printarea.js
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slides.min.jquery.js
583 ms
jsrender.js
583 ms
sitesearch.js
638 ms
jquery.pagination.js
658 ms
jquery.pagination.js
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underscore-min.js
659 ms
backbone-min.js
664 ms
amplify-1.1.min.js
729 ms
utility.js
728 ms
jquery.bt.min.js
736 ms
components.js
751 ms
functions.js
740 ms
legacy.js
98 ms
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logo.png
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btn-search-input.png
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vertical-divider.png
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arrows-rgt.png
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arrow.png
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medium-chevron.png
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standard
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tickmark.png
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dotted-bg.gif
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footerBg.jpg
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topnav-divider.png
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sitetagger.js
257 ms
tag.js
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arrow-down.png
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config.json
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predictive_search.csv
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external-link.gif
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c07ea36d0a33665704ebcfcb6e2f30be8ddf8d1e.js
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conversion_async.js
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px.gif
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262 ms
sainsburysenergy.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.
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
ARIA IDs are not unique
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
Links do not have a discernible name
sainsburysenergy.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
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
sainsburysenergy.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
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
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sainsburysenergy.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 Sainsburysenergy.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.
sainsburysenergy.com
Open Graph description is not detected on the main page of Sainsbury S Energy. 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: