Tools & Wizards About Us
dagstuhl.de screenshot

Report Summary

  • 90

    Performance

    Renders faster than
    91% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

dagstuhl.de

Home

Page Load Speed

2.5 sec in total

First Response

365 ms

Resources Loaded

2 sec

Page Rendered

167 ms

dagstuhl.de screenshot

About Website

Visit dagstuhl.de now to see the best up-to-date Dagstuhl content for United States and also check out these interesting facts you probably never knew about dagstuhl.de

Schloss Dagstuhl - Leibniz Center for Informatics

Visit dagstuhl.de

Key Findings

We analyzed Dagstuhl.de page load time and found that the first response time was 365 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

dagstuhl.de performance score

90

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

64/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

88/100

25%

SI (Speed Index)

Value4.5 s

72/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value2.6 s

98/100

10%

Network Requests Diagram

dagstuhl.de

365 ms

www.dagstuhl.de

425 ms

javascript_f93b88063d.js

106 ms

layout.css

219 ms

scripts.js

221 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 97% of them (29 requests) were addressed to the original Dagstuhl.de, 3% (1 request) were made to Portal.dagstuhl.de. The less responsive or slowest element that took the longest time to load (651 ms) relates to the external source Portal.dagstuhl.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 67.3 kB (43%)

Content Size

157.4 kB

After Optimization

90.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dagstuhl.de main page is 157.4 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. 15% of websites need less resources to load. Images take 100.5 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 9.4 kB

  • Original 13.1 kB
  • After minification 12.0 kB
  • After compression 3.7 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 9.4 kB or 72% of the original size.

Image Optimization

-22%

Potential reduce by 21.7 kB

  • Original 100.5 kB
  • After minification 78.7 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. Obviously, Dagstuhl needs image optimization as it can save up to 21.7 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-69%

Potential reduce by 2.2 kB

  • Original 3.2 kB
  • After minification 2.8 kB
  • After compression 970 B

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 2.2 kB or 69% of the original size.

CSS Optimization

-84%

Potential reduce by 34.0 kB

  • Original 40.7 kB
  • After minification 31.8 kB
  • After compression 6.7 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. Dagstuhl.de needs all CSS files to be minified and compressed as it can save up to 34.0 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (46%)

Requests Now

28

After Optimization

15

  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dagstuhl. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dagstuhl.de

dagstuhl.de

365 ms

www.dagstuhl.de

www.dagstuhl.de

425 ms

javascript_f93b88063d.js

javascript_f93b88063d.js

106 ms

layout.css

layout.css

219 ms

scripts.js

scripts.js

221 ms

global.css

global.css

106 ms

screen.css

screen.css

105 ms

capture_small.jpg

capture_small.jpg

651 ms

0bd23a7735.png

0bd23a7735.png

102 ms

98e21b1cfc.png

98e21b1cfc.png

102 ms

5cc2901dbe.png

5cc2901dbe.png

102 ms

6dff0b323b.png

6dff0b323b.png

207 ms

75e6b109d3.png

75e6b109d3.png

210 ms

fd8de5d929.png

fd8de5d929.png

210 ms

3a7feb99e0.png

3a7feb99e0.png

209 ms

e1f5497ad3.png

e1f5497ad3.png

224 ms

2cd8fd0200.png

2cd8fd0200.png

224 ms

bg.png

bg.png

308 ms

bg_top.png

bg_top.png

310 ms

ico_flag_de_ext.gif

ico_flag_de_ext.gif

309 ms

ico_flag_en_ext_d.gif

ico_flag_en_ext_d.gif

309 ms

fadeline.gif

fadeline.gif

321 ms

lzi_logo.gif

lzi_logo.gif

322 ms

leibniz_2.png

leibniz_2.png

506 ms

a821d1f908.png

a821d1f908.png

408 ms

ico_link_ext.gif

ico_link_ext.gif

406 ms

b0cdd12691.png

b0cdd12691.png

407 ms

bg_bottom_2.png

bg_bottom_2.png

430 ms

print.css

print.css

104 ms

lzi_foto_21.jpg

lzi_foto_21.jpg

206 ms

Accessibility Review

dagstuhl.de accessibility score

55

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

dagstuhl.de best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

dagstuhl.de SEO score

54

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    DE

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dagstuhl.de can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed German language. Our system also found out that Dagstuhl.de main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

dagstuhl.de

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