Access sei-us.org. Stockholm Environment Institute: bridging science and policy

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

66/100

25%

SI (Speed Index)

Value3.0 s

94/100

10%

TBT (Total Blocking Time)

Value1,170 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0.447

20/100

15%

TTI (Time to Interactive)

Value8.9 s

34/100

10%

www.sei.org

47 ms

www.sei.org

382 ms

2825234.js

159 ms

style.min.css

34 ms

breeze-prefetch-links.min.js

25 ms

Our browser made a total of 48 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Sei-us.org, 8% (4 requests) were made to Cdn.iubenda.com and 2% (1 request) were made to Cs.iubenda.com. The less responsive or slowest element that took the longest time to load (382 ms) relates to the external source Sei.org.

Content Size

375.0 kB

After Optimization

288.9 kB

In fact, the total size of Sei-us.org main page is 375.0 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. 60% of websites need less resources to load. Images take 122.7 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 84.7 kB

Original 100.9 kB
After minification 94.1 kB
After compression 16.2 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 84.7 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

Original 122.7 kB
After minification 122.7 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. Sei Us images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 1.2 kB

Original 112.9 kB
After minification 112.8 kB
After compression 111.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 131 B

Original 38.5 kB
After minification 38.5 kB
After compression 38.4 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. Sei-us.org has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sei Us. 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.