2.1 sec in total
109 ms
1.7 sec
354 ms
Welcome to mailman.columbia.edu homepage info - get ready to check Mailman Columbia best content for United States right away, or after learning these important things about mailman.columbia.edu
Since 1922, the Mailman School has been at the forefront of public health research, education, and community collaboration.
Visit mailman.columbia.eduWe analyzed Mailman.columbia.edu page load time and found that the first response time was 109 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.
mailman.columbia.edu performance score
name
value
score
weighting
Value3.6 s
32/100
10%
Value5.8 s
15/100
25%
Value4.8 s
67/100
10%
Value470 ms
60/100
30%
Value0.116
85/100
15%
Value13.1 s
12/100
10%
109 ms
53 ms
51 ms
8 ms
29 ms
Our browser made a total of 55 requests to load all elements on the main page. We found that 64% of them (35 requests) were addressed to the original Mailman.columbia.edu, 4% (2 requests) were made to T.sharethis.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (425 ms) relates to the external source Connect.facebook.net.
Page size can be reduced by 883.1 kB (41%)
2.2 MB
1.3 MB
In fact, the total size of Mailman.columbia.edu main page is 2.2 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. 65% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.
Potential reduce by 37.8 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 37.8 kB or 77% of the original size.
Potential reduce by 52.1 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. Mailman Columbia images are well optimized though.
Potential reduce by 285.1 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 285.1 kB or 67% of the original size.
Potential reduce by 508.1 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. Mailman.columbia.edu needs all CSS files to be minified and compressed as it can save up to 508.1 kB or 90% of the original size.
Number of requests can be reduced by 19 (37%)
51
32
The browser has sent 51 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mailman Columbia. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.
mailman.columbia.edu
109 ms
www.mailman.columbia.edu
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mailman.columbia.edu 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.
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
Links do not have a discernible name
mailman.columbia.edu 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
Browser errors were logged to the console
Page has valid source maps
mailman.columbia.edu 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 Mailman.columbia.edu 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 Mailman.columbia.edu 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.
mailman.columbia.edu
Open Graph description is not detected on the main page of Mailman Columbia. 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: