Access env.dtu.dk. DTU Sustain

name

value

score

weighting

FCP (First Contentful Paint)

Value6.1 s

3/100

10%

LCP (Largest Contentful Paint)

Value7.8 s

3/100

25%

SI (Speed Index)

Value10.7 s

7/100

10%

TBT (Total Blocking Time)

Value200 ms

89/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value9.5 s

30/100

10%

env.dtu.dk

301 ms

www.env.dtu.dk

1014 ms

init_alldevices.min.css

190 ms

adapt.config.js

197 ms

adapt.min.js

196 ms

Our browser made a total of 118 requests to load all elements on the main page. We found that 81% of them (95 requests) were addressed to the original Env.dtu.dk, 17% (20 requests) were made to I.ytimg.com and 2% (2 requests) were made to Ssl.siteimprove.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Env.dtu.dk.

Content Size

1.6 MB

After Optimization

582.6 kB

In fact, the total size of Env.dtu.dk main page is 1.6 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. Javascripts take 803.2 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 190.9 kB

Original 219.5 kB
After minification 190.8 kB
After compression 28.6 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 28.7 kB, which is 13% 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 190.9 kB or 87% of the original size.

Image Optimization

-4%

Potential reduce by 10.8 kB

Original 263.3 kB
After minification 252.5 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. Env DTU images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 572.7 kB

Original 803.2 kB
After minification 785.5 kB
After compression 230.5 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 572.7 kB or 71% of the original size.

CSS Optimization

-75%

Potential reduce by 218.8 kB

Original 289.8 kB
After minification 289.8 kB
After compression 71.0 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. Env.dtu.dk needs all CSS files to be minified and compressed as it can save up to 218.8 kB or 75% of the original size.

Requests Now

115

After Optimization

The browser has sent 115 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Env DTU. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

ARIA IDs are not unique

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

DA
Language Claimed

DA
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Env.dtu.dk can be misinterpreted by Google and other search engines. Our service has detected that Danish is used on the page, and it matches the claimed language. Our system also found out that Env.dtu.dk 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

env.dtu.dk

Open Graph description is not detected on the main page of Env DTU. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

DTU Sustain

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)

Network Requests Diagram

env.dtu.dk

www.env.dtu.dk

init_alldevices.min.css

adapt.config.js

adapt.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

env.dtu.dk

www.env.dtu.dk

init_alldevices.min.css

adapt.config.js

adapt.min.js

jquery.min.js

jquery-ui-1.9.0.min.js

ajax.min.js

jquery.datepicker-da.js

WebResource.axd

WebResource.axd

base_desktop.min.css

desktop.min.js

dtu_logo_servicemenu.png

close1.png

menu_divider.png

miljoe_dk.ashx

Stor%20mobil%20top_DTU_Milj%20DK.ashx

Lille%20mobiltop%20DTU%20Miljoe%20DK.ashx

menu.png

search.png

shortcuts.png

dtulogo2_colour.png

megamenu_bg.png

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

play_big.png

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

gimage.ashx

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