6.1 sec in total
631 ms
5.3 sec
169 ms
Visit archive.eso.org now to see the best up-to-date Archive ESO content for China and also check out these interesting facts you probably never knew about archive.eso.org
ESO is the European Organisation for Astronomical Research in the Southern Hemisphere. It operates the La Silla Paranal Observatory in Chile and has its headquarters in Garching, near Munich, Germany.
Visit archive.eso.orgWe analyzed Archive.eso.org page load time and found that the first response time was 631 ms and then it took 5.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
archive.eso.org performance score
name
value
score
weighting
Value4.7 s
13/100
10%
Value5.8 s
16/100
25%
Value5.9 s
48/100
10%
Value50 ms
100/100
30%
Value0
100/100
15%
Value4.8 s
79/100
10%
631 ms
515 ms
217 ms
216 ms
214 ms
Our browser made a total of 50 requests to load all elements on the main page. We found that 96% of them (48 requests) were addressed to the original Archive.eso.org, 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Archive.eso.org.
Page size can be reduced by 99.4 kB (58%)
172.4 kB
73.0 kB
In fact, the total size of Archive.eso.org main page is 172.4 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. 15% of websites need less resources to load. CSS take 84.0 kB which makes up the majority of the site volume.
Potential reduce by 20.5 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. 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 20.5 kB or 72% of the original size.
Potential reduce by 1.0 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. Archive ESO images are well optimized though.
Potential reduce by 7.7 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 7.7 kB or 25% of the original size.
Potential reduce by 70.2 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. Archive.eso.org needs all CSS files to be minified and compressed as it can save up to 70.2 kB or 84% of the original size.
Number of requests can be reduced by 42 (88%)
48
6
The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Archive 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 from 13 to 1 for CSS and as a result speed up the page load time.
archive.eso.org
631 ms
cms.html
515 ms
functions.js
217 ms
layout_eso_2007.css
216 ms
static.css
214 ms
eso.css
211 ms
modernizr.js
310 ms
jquerycommon.js
802 ms
jquery.js
1061 ms
json2.js
517 ms
jsonpath.js
415 ms
swfobject.js
421 ms
flash.js
513 ms
base.css
408 ms
basemod_2col_left.css
409 ms
eso2008.css
701 ms
nav_vlist.css
507 ms
nav_shinybuttons.css
611 ms
header.css
613 ms
navmain.css
812 ms
footer.css
1577 ms
frontpage.css
812 ms
print_003.css
815 ms
bg_left.gif
169 ms
headerimage.jpg
1492 ms
esologo.png
212 ms
austria.gif
924 ms
sep1.gif
235 ms
belgium.gif
925 ms
czechrepublic.gif
1393 ms
denmark.gif
924 ms
finland.gif
1160 ms
france.gif
1132 ms
germany.gif
1392 ms
italy.gif
1928 ms
netherlands.gif
2167 ms
poland.gif
1923 ms
portugal.gif
1598 ms
spain.gif
1605 ms
sweden.gif
2159 ms
switzerland.gif
1921 ms
unitedkingdom.gif
1812 ms
sep2.gif
2019 ms
brazil.gif
2130 ms
chile.gif
2127 ms
bg_left.gif
2125 ms
rsslogo.png
2332 ms
ext_link2.gif
2340 ms
analytics.js
20 ms
collect
13 ms
archive.eso.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.
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
Form elements do not have associated labels
Links do not have a discernible name
archive.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
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
archive.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
Image elements do not have [alt] attributes
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Archive.eso.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 Archive.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.
archive.eso.org
Open Graph description is not detected on the main page of Archive ESO. 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: