Access su.se. Stockholms universitet

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

13/100

10%

LCP (Largest Contentful Paint)

Value8.9 s

1/100

25%

SI (Speed Index)

Value14.0 s

1/100

10%

TBT (Total Blocking Time)

Value2,740 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.014

100/100

15%

TTI (Time to Interactive)

Value40.3 s

0/100

10%

www.su.se

824 ms

main.min.css

460 ms

jquery.nstSlider.min.css

344 ms

jquery.min.js

21 ms

jquery.nstSlider.min.js

346 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 75% of them (48 requests) were addressed to the original Su.se, 6% (4 requests) were made to Su.matomo.cloud and 5% (3 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Su.se.

Content Size

7.3 MB

After Optimization

5.9 MB

In fact, the total size of Su.se main page is 7.3 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. 60% of websites need less resources to load. Images take 6.6 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 128.3 kB

Original 147.4 kB
After minification 103.4 kB
After compression 19.1 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. This page needs HTML code to be minified as it can gain 44.0 kB, which is 30% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 128.3 kB or 87% of the original size.

Image Optimization

-20%

Potential reduce by 1.3 MB

Original 6.6 MB
After minification 5.3 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. Obviously, Su needs image optimization as it can save up to 1.3 MB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 10.1 kB

Original 480.7 kB
After minification 480.7 kB
After compression 470.7 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

-1%

Potential reduce by 810 B

Original 93.7 kB
After minification 93.7 kB
After compression 92.9 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. Su.se has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Su. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.