Tools & Wizards About Us
dark-cosmology.dk screenshot

Report Summary

  • 44

    Performance

    Renders faster than
    63% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

dark-cosmology.dk

DARK – Niels Bohr Institute - University of Copenhagen

Page Load Speed

4.7 sec in total

First Response

393 ms

Resources Loaded

4.2 sec

Page Rendered

168 ms

dark-cosmology.dk screenshot

About Website

Welcome to dark-cosmology.dk homepage info - get ready to check DARK Cosmology best content right away, or after learning these important things about dark-cosmology.dk

DARK is an astrophysics research section at the Niels Bohr Institute, University of Copenhagen, focusing on the 'dark Universe': what is dark matter and dark energy, how can we measure the Uni...

Visit dark-cosmology.dk

Key Findings

We analyzed Dark-cosmology.dk page load time and found that the first response time was 393 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

dark-cosmology.dk performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.5 s

6/100

10%

LCP (Largest Contentful Paint)

Value11.3 s

0/100

25%

SI (Speed Index)

Value9.6 s

11/100

10%

TBT (Total Blocking Time)

Value250 ms

84/100

30%

CLS (Cumulative Layout Shift)

Value0.019

100/100

15%

TTI (Time to Interactive)

Value10.7 s

23/100

10%

Network Requests Diagram

dark-cosmology.dk

393 ms

dark-cosmology.dk

420 ms

dark.nbi.ku.dk

531 ms

dark.nbi.ku.dk

872 ms

jquery.min.js

1089 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Dark-cosmology.dk, 41% (18 requests) were made to Cdn.jsdelivr.net and 27% (12 requests) were made to Dark.nbi.ku.dk. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source Cms.ku.dk.

Page Optimization Overview & Recommendations

Page size can be reduced by 310.5 kB (28%)

Content Size

1.1 MB

After Optimization

803.1 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Dark-cosmology.dk main page is 1.1 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. 40% of websites need less resources to load. Images take 706.5 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 47.2 kB

  • Original 58.5 kB
  • After minification 52.1 kB
  • After compression 11.4 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 6.5 kB, which is 11% 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 47.2 kB or 81% of the original size.

Image Optimization

-3%

Potential reduce by 22.0 kB

  • Original 706.5 kB
  • After minification 684.6 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. DARK Cosmology images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 241.4 kB

  • Original 348.6 kB
  • After minification 339.1 kB
  • After compression 107.2 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 241.4 kB or 69% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (50%)

Requests Now

34

After Optimization

17

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of DARK Cosmology. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dark-cosmology.dk

dark-cosmology.dk

393 ms

dark-cosmology.dk

dark-cosmology.dk

420 ms

dark.nbi.ku.dk

dark.nbi.ku.dk

531 ms

dark.nbi.ku.dk

dark.nbi.ku.dk

872 ms

jquery.min.js

jquery.min.js

1089 ms

cookie_filters.js

cookie_filters.js

563 ms

bootstrap.min.css

bootstrap.min.css

31 ms

ku-gridboxes.min.css

ku-gridboxes.min.css

28 ms

science.css

science.css

118 ms

gridforside.css

gridforside.css

26 ms

jquery.mmenu.css

jquery.mmenu.css

28 ms

slick.min.js

slick.min.js

665 ms

swiper-bundle.min.js

swiper-bundle.min.js

29 ms

bootstrap.min.js

bootstrap.min.js

30 ms

search.js

search.js

30 ms

mmenu.js

mmenu.js

763 ms

ku-mmenu.js

ku-mmenu.js

569 ms

hammer.min.js

hammer.min.js

31 ms

accordions.js

accordions.js

569 ms

cookiedata.js

cookiedata.js

659 ms

ccc.js

ccc.js

1062 ms

kokainhistorie.png

kokainhistorie.png

666 ms

Daybreak_at_Gale_Crater_kredit_NASA_JPL-Caltech.png

Daybreak_at_Gale_Crater_kredit_NASA_JPL-Caltech.png

540 ms

305 ms

Pest_-_hjemmeside.png

Pest_-_hjemmeside.png

664 ms

663 ms

663 ms

663 ms

794 ms

698 ms

research550x300.jpg

research550x300.jpg

504 ms

palm_tree_image.jpg

palm_tree_image.jpg

663 ms

teaching550x300.jpg

teaching550x300.jpg

803 ms

science.svg

science.svg

42 ms

e7e12bb8-08a8-42a7-97c3-b24e19106e27.js

e7e12bb8-08a8-42a7-97c3-b24e19106e27.js

561 ms

print.min.css

print.min.css

62 ms

footersegl.svg

footersegl.svg

89 ms

open-sans-v23-latin-ext_latin-600.woff

open-sans-v23-latin-ext_latin-600.woff

92 ms

open-sans-v23-latin-ext_latin-700.woff

open-sans-v23-latin-ext_latin-700.woff

90 ms

open-sans-v23-latin-ext_latin-400.woff

open-sans-v23-latin-ext_latin-400.woff

91 ms

open-sans-v23-latin-ext_latin-300.woff

open-sans-v23-latin-ext_latin-300.woff

89 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

90 ms

KU.woff

KU.woff

91 ms

268867

268867

615 ms

Accessibility Review

dark-cosmology.dk accessibility score

100

Accessibility Issues

Best Practices

dark-cosmology.dk best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

dark-cosmology.dk SEO score

69

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

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

Impact

Issue

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Dark-cosmology.dk 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 Dark-cosmology.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

dark-cosmology.dk

Open Graph description is not detected on the main page of DARK Cosmology. 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: