2.5 sec in total
156 ms
2 sec
373 ms
Click here to check amazing Esr content for United States. Otherwise, check out these important facts you probably never knew about esr.org
Visit esr.orgWe analyzed Esr.org page load time and found that the first response time was 156 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
esr.org performance score
name
value
score
weighting
Value5.2 s
8/100
10%
Value15.6 s
0/100
25%
Value23.8 s
0/100
10%
Value610 ms
49/100
30%
Value0.051
99/100
15%
Value25.4 s
0/100
10%
156 ms
159 ms
338 ms
137 ms
136 ms
Our browser made a total of 43 requests to load all elements on the main page. We found that all of those requests were addressed to Esr.org and no external sources were called. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Esr.org.
Page size can be reduced by 123.2 kB (9%)
1.3 MB
1.2 MB
In fact, the total size of Esr.org main page is 1.3 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. 15% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 602 B
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 602 B or 61% of the original size.
Potential reduce by 53.9 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. Esr images are well optimized though.
Potential reduce by 66.2 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 66.2 kB or 65% of the original size.
Potential reduce by 2.5 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. Esr.org needs all CSS files to be minified and compressed as it can save up to 2.5 kB or 82% of the original size.
Number of requests can be reduced by 8 (26%)
31
23
The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Esr. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
esr.org
156 ms
www.esr.org
159 ms
jquery-1.7.1.min.js
338 ms
jquery.cycle.lite.js
137 ms
esrmain.html
136 ms
bar.html
141 ms
left.html
203 ms
right_outreach.html
144 ms
header_transparent_background.jpg
203 ms
abouta.gif
136 ms
staffa.gif
137 ms
publicationsa.gif
136 ms
researcha.gif
137 ms
outreacha.gif
199 ms
photosa.gif
270 ms
donatea.gif
274 ms
searcha.gif
273 ms
homea.gif
273 ms
intraneta.gif
332 ms
esr_light.css
340 ms
esr_drk.css
402 ms
out_title.gif
406 ms
juanitaSTEMnew.jpg
1156 ms
morephotos.jpg
471 ms
about2.gif
132 ms
staff2.gif
132 ms
publications2.gif
203 ms
research2.gif
204 ms
outreach2.gif
265 ms
photos2.gif
266 ms
links2.gif
274 ms
home2.gif
334 ms
intranet.gif
340 ms
intraneta.gif
398 ms
aq_global_sep2011_thumb.png
590 ms
aq_global_oct2011_thumb.png
564 ms
aq_global_nov2011_thumb.png
641 ms
aq_global_dec2011_thumb.png
754 ms
aquarius_5b.jpg
522 ms
instant5b.jpg
657 ms
oscar5b.jpg
699 ms
polarsci_5b.jpg
724 ms
supportESR_3.gif
776 ms
esr.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.
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
esr.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
esr.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 Esr.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 Esr.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.
esr.org
Open Graph description is not detected on the main page of Esr. 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: