Tools & Wizards About Us
vilhelm.nu screenshot

Report Summary

  • 69

    Performance

    Renders faster than
    80% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

vilhelm.nu

Magnus Vilhelm Persson, PhD Astronomy/Physics

Page Load Speed

2.5 sec in total

First Response

452 ms

Resources Loaded

1.6 sec

Page Rendered

415 ms

vilhelm.nu screenshot

About Website

Visit vilhelm.nu now to see the best up-to-date Vilhelm content and also check out these interesting facts you probably never knew about vilhelm.nu

Magnus Vilhelm Persson is a Post Doctoral researcher in Astronomy at Leiden Observatory (Sterrewacht) Leiden University.

Visit vilhelm.nu

Key Findings

We analyzed Vilhelm.nu page load time and found that the first response time was 452 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

vilhelm.nu performance score

69

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

87/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

66/100

25%

SI (Speed Index)

Value6.1 s

44/100

10%

TBT (Total Blocking Time)

Value490 ms

59/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value5.6 s

69/100

10%

Network Requests Diagram

vilhelm.nu

452 ms

academicons.css

116 ms

base.css

227 ms

main.css

228 ms

vendor.css

226 ms

Our browser made a total of 25 requests to load all elements on the main page. We found that all of those requests were addressed to Vilhelm.nu and no external sources were called. The less responsive or slowest element that took the longest time to load (673 ms) belongs to the original domain Vilhelm.nu.

Page Optimization Overview & Recommendations

Page size can be reduced by 40.1 kB (5%)

Content Size

847.0 kB

After Optimization

807.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vilhelm.nu main page is 847.0 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. 30% of websites need less resources to load. Images take 711.5 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 12.9 kB

  • Original 17.3 kB
  • After minification 13.0 kB
  • After compression 4.5 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 4.4 kB, which is 25% 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 12.9 kB or 74% of the original size.

Image Optimization

-0%

Potential reduce by 712 B

  • Original 711.5 kB
  • After minification 710.8 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. Vilhelm images are well optimized though.

JavaScript Optimization

-20%

Potential reduce by 17.7 kB

  • Original 89.4 kB
  • After minification 89.4 kB
  • After compression 71.6 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 17.7 kB or 20% of the original size.

CSS Optimization

-30%

Potential reduce by 8.7 kB

  • Original 28.8 kB
  • After minification 28.8 kB
  • After compression 20.1 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. Vilhelm.nu needs all CSS files to be minified and compressed as it can save up to 8.7 kB or 30% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (67%)

Requests Now

15

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 15 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vilhelm. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vilhelm.nu

vilhelm.nu

452 ms

academicons.css

academicons.css

116 ms

base.css

base.css

227 ms

main.css

main.css

228 ms

vendor.css

vendor.css

226 ms

modernizr.js

modernizr.js

231 ms

pace.min.js

pace.min.js

232 ms

jquery-2.1.3.min.js

jquery-2.1.3.min.js

387 ms

plugins.js

plugins.js

451 ms

main.js

main.js

338 ms

fonts.css

fonts.css

113 ms

font-awesome.min.css

font-awesome.min.css

115 ms

micons.css

micons.css

120 ms

academicons.css

academicons.css

225 ms

piwik.js

piwik.js

115 ms

logo.png

logo.png

114 ms

intro-bg.jpg

intro-bg.jpg

673 ms

profile-pic.jpg

profile-pic.jpg

131 ms

lora-regular-webfont.woff

lora-regular-webfont.woff

118 ms

poppins-bold-webfont.woff

poppins-bold-webfont.woff

230 ms

poppins-medium-webfont.woff

poppins-medium-webfont.woff

289 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

406 ms

academicons.ttf

academicons.ttf

218 ms

poppins-semibold-webfont.woff

poppins-semibold-webfont.woff

232 ms

poppins-regular-webfont.woff

poppins-regular-webfont.woff

348 ms

Accessibility Review

vilhelm.nu accessibility score

68

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

vilhelm.nu best practices score

75

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

Browser errors were logged to the console

SEO Factors

vilhelm.nu SEO score

100

Search Engine Optimization Advices

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

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 Vilhelm.nu 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 Vilhelm.nu 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

vilhelm.nu

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