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Report Summary

About Website

Click here to check amazing Sei content for China. Otherwise, check out these important facts you probably never knew about sei.org

Stockholm Environment Institute (SEI) is an international non-profit research and policy organization. We shift policy and practice towards sustainability.

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name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value5.9 s

14/100

25%

SI (Speed Index)

Value5.0 s

62/100

10%

TBT (Total Blocking Time)

Value780 ms

37/100

30%

CLS (Cumulative Layout Shift)

Value1.041

2/100

15%

TTI (Time to Interactive)

Value9.4 s

31/100

10%

sei.org

69 ms

www.sei.org

902 ms

2825234.js

132 ms

style.min.css

23 ms

stub.js

104 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 89% of them (50 requests) were addressed to the original Sei.org, 7% (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 (902 ms) belongs to the original domain Sei.org.

Content Size

477.0 kB

After Optimization

379.9 kB

In fact, the total size of Sei.org main page is 477.0 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. 70% of websites need less resources to load. Images take 211.8 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 96.7 kB

Original 114.8 kB
After minification 106.7 kB
After compression 18.1 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 96.7 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

Original 211.8 kB
After minification 211.8 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 images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 195 B

Original 111.8 kB
After minification 111.8 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.org has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sei. 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.

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sei.org 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 Sei.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.

Social Sharing Optimization

sei.org

Open Graph data is detected on the main page of Sei. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

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Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)