4.7 sec in total
394 ms
4 sec
387 ms
Click here to check amazing ESO content for China. Otherwise, check out these important facts you probably never knew about eso.org
ESO, European Organisation for Astronomical Research in the Southern Hemisphere
Visit eso.orgWe analyzed Eso.org page load time and found that the first response time was 394 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
eso.org performance score
name
value
score
weighting
Value3.8 s
28/100
10%
Value15.8 s
0/100
25%
Value7.6 s
26/100
10%
Value3,530 ms
1/100
30%
Value0.734
6/100
15%
Value20.7 s
2/100
10%
394 ms
716 ms
300 ms
5 ms
101 ms
Our browser made a total of 51 requests to load all elements on the main page. We found that 43% of them (22 requests) were addressed to the original Eso.org, 31% (16 requests) were made to Cdn.eso.org and 8% (4 requests) were made to S.ytimg.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Eso.org.
Page size can be reduced by 809.6 kB (17%)
4.9 MB
4.1 MB
In fact, the total size of Eso.org main page is 4.9 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. 55% of websites need less resources to load. Images take 3.9 MB which makes up the majority of the site volume.
Potential reduce by 168.9 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 168.9 kB or 86% of the original size.
Potential reduce by 78.2 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. ESO images are well optimized though.
Potential reduce by 165.2 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 165.2 kB or 62% of the original size.
Potential reduce by 397.3 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. Eso.org needs all CSS files to be minified and compressed as it can save up to 397.3 kB or 83% of the original size.
Number of requests can be reduced by 8 (20%)
40
32
The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ESO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.
eso.org
394 ms
716 ms
main.7cf8f1a4c4d7.css
300 ms
analytics.js
5 ms
extras.8eef4882228f.css
101 ms
main.21bcb5bf3cf6.js
978 ms
trackingCode.js
107 ms
sprites.a574e6197b81.png
332 ms
esoshop-alpha.jpg
239 ms
pano_PV_960x.jpg
486 ms
elt.jpg
293 ms
alma.jpg
295 ms
vlt.jpg
529 ms
lasilla.jpg
527 ms
apex.jpg
526 ms
collect
12 ms
d5af76d8-a90b-4527-b3a3-182207cc3250.a6e2d3921c9e.woff
618 ms
5b4a262e-3342-44e2-8ad7-719998a68134.a93e96be336c.woff
1044 ms
9a2e4855-380f-477f-950e-d98e8db54eac.071c48540fd7.woff
1046 ms
8ac9e38d-29c6-41ea-8e47-4ae4d2b1a4e1.62a99c9560aa.woff
1046 ms
5b29e833-1b7a-40ab-82a5-cfd69c8650f4.94335dd63f73.woff
1046 ms
835e7b4f-b524-4374-b57b-9a8fc555fd4e.05b343eeb1e1.woff
1046 ms
fontawesome-webfont.d95d6f5d5ab7.woff
1503 ms
eso1546a.jpg
300 ms
timestamp.txt
100 ms
iframe_api
89 ms
fettu.jpg
1555 ms
ann16010a.jpg
121 ms
ann16009a.jpg
114 ms
ann16008a.jpg
120 ms
ann16007a.jpg
162 ms
potw1609a.jpg
167 ms
eso1322a.jpg
362 ms
www-widgetapi.js
67 ms
ooKNYQ97puI
46 ms
eso1606a.jpg
210 ms
www-embed-player-vflZsBgOl.css
25 ms
www-embed-player.js
53 ms
base.js
96 ms
yrK4EqpSRdoujKQmsJoZ5WaLgeULvcWnibQMQSxOOnM.js
40 ms
ad_status.js
38 ms
2UX7WLTfW3W8TclTUvlFyQ.woff
30 ms
RxZJdnzeo3R5zSexge8UUT8E0i7KZn-EPnyo3HZu7kw.woff
32 ms
eso1605a.jpg
113 ms
eso1604a.jpg
36 ms
eso1603a.jpg
70 ms
eso1602a.jpg
35 ms
eso1601a.jpg
37 ms
eso1549a.jpg
36 ms
eso1548a.jpg
70 ms
eso1547a.jpg
36 ms
eso.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
[aria-hidden="true"] elements contain focusable descendents
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
Buttons do not have an accessible name
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
eso.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
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
eso.org 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
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 Eso.org 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 Eso.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.
eso.org
Open Graph data is detected on the main page of ESO. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: