11.9 sec in total
124 ms
11.6 sec
199 ms
Visit darkenergysurvey.org now to see the best up-to-date Dark Energy Survey content for United States and also check out these interesting facts you probably never knew about darkenergysurvey.org
Visit darkenergysurvey.orgWe analyzed Darkenergysurvey.org page load time and found that the first response time was 124 ms and then it took 11.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
darkenergysurvey.org performance score
name
value
score
weighting
Value3.7 s
30/100
10%
Value7.3 s
4/100
25%
Value4.8 s
68/100
10%
Value470 ms
61/100
30%
Value0.144
78/100
15%
Value9.6 s
29/100
10%
124 ms
61 ms
54 ms
51 ms
51 ms
Our browser made a total of 90 requests to load all elements on the main page. We found that 46% of them (41 requests) were addressed to the original Darkenergysurvey.org, 29% (26 requests) were made to Static.xx.fbcdn.net and 10% (9 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (9.9 sec) relates to the external source Scontent.xx.fbcdn.net.
Page size can be reduced by 119.3 kB (13%)
902.8 kB
783.5 kB
In fact, the total size of Darkenergysurvey.org main page is 902.8 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. 40% of websites need less resources to load. Images take 758.6 kB which makes up the majority of the site volume.
Potential reduce by 22.2 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. This page needs HTML code to be minified as it can gain 5.3 kB, which is 18% 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 22.2 kB or 77% of the original size.
Potential reduce by 30.8 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. Dark Energy Survey images are well optimized though.
Potential reduce by 49.5 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 49.5 kB or 53% of the original size.
Potential reduce by 16.8 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. Darkenergysurvey.org needs all CSS files to be minified and compressed as it can save up to 16.8 kB or 79% of the original size.
Number of requests can be reduced by 42 (48%)
88
46
The browser has sent 88 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dark Energy Survey. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and from 16 to 1 for CSS and as a result speed up the page load time.
darkenergysurvey.org
124 ms
layout.css
61 ms
styles.css
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menu.css
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menu_core.css
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jquery.jcarousel.css
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jquery.jcarousel.fonts.css
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jcarousel.css
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jquery-1.3.2.min.js
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jquery.jcarousel.pack.js
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jcarousel.js
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menu.js
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ga.js
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darkenergysurvey.org 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
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
darkenergysurvey.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
darkenergysurvey.org SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Darkenergysurvey.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 Darkenergysurvey.org main page’s claimed encoding is iso-8859-1. 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.
darkenergysurvey.org
Open Graph description is not detected on the main page of Dark Energy Survey. 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: