9.7 sec in total
191 ms
7.2 sec
2.3 sec
Visit c40cities.org now to see the best up-to-date C40 Cities content and also check out these interesting facts you probably never knew about c40cities.org
C40 Cities is a global network of nearly 100 mayors of the world’s leading cities that are united in action to confront the climate crisis.
Visit c40cities.orgWe analyzed C40cities.org page load time and found that the first response time was 191 ms and then it took 9.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
c40cities.org performance score
name
value
score
weighting
Value3.0 s
48/100
10%
Value3.3 s
69/100
25%
Value6.1 s
45/100
10%
Value860 ms
33/100
30%
Value0.001
100/100
15%
Value7.1 s
51/100
10%
191 ms
94 ms
40 ms
2601 ms
1100 ms
Our browser made a total of 95 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original C40cities.org, 22% (21 requests) were made to Pbs.twimg.com and 13% (12 requests) were made to C40.org. The less responsive or slowest element that took the longest time to load (6.4 sec) relates to the external source C40-production-images.s3.amazonaws.com.
Page size can be reduced by 2.6 MB (7%)
38.4 MB
35.8 MB
In fact, the total size of C40cities.org main page is 38.4 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. 85% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 36.5 MB which makes up the majority of the site volume.
Potential reduce by 42.2 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. 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 42.2 kB or 67% of the original size.
Potential reduce by 1.2 MB
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. C40 Cities images are well optimized though.
Potential reduce by 916.8 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 916.8 kB or 68% of the original size.
Potential reduce by 352.6 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. C40cities.org needs all CSS files to be minified and compressed as it can save up to 352.6 kB or 83% of the original size.
Number of requests can be reduced by 18 (21%)
87
69
The browser has sent 87 CSS, Javascripts, AJAX and image requests in order to completely render the main page of C40 Cities. 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 from 8 to 1 for CSS and as a result speed up the page load time.
www.c40.org
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c40cities.org accessibility score
c40cities.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
c40cities.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
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise C40cities.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 C40cities.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.
c40cities.org
Open Graph description is not detected on the main page of C40 Cities. 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: