Tools & Wizards About Us
science.dresden.de screenshot

Report Summary

  • 57

    Performance

    Renders faster than
    74% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 62% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

science.dresden.de

DSC

Page Load Speed

3.9 sec in total

First Response

139 ms

Resources Loaded

3.6 sec

Page Rendered

158 ms

science.dresden.de screenshot

About Website

Visit science.dresden.de now to see the best up-to-date Science Dresden content for Germany and also check out these interesting facts you probably never knew about science.dresden.de

Visit science.dresden.de

Key Findings

We analyzed Science.dresden.de page load time and found that the first response time was 139 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

science.dresden.de performance score

57

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

29/100

10%

LCP (Largest Contentful Paint)

Value8.4 s

2/100

25%

SI (Speed Index)

Value6.5 s

38/100

10%

TBT (Total Blocking Time)

Value70 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value7.3 s

50/100

10%

Network Requests Diagram

en

139 ms

602 ms

overlib.js

244 ms

calendar.js

335 ms

calendar-setup.js

240 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 61% of them (23 requests) were addressed to the original Science.dresden.de, 29% (11 requests) were made to Assets.dresden.de and 5% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Dresden-science-calendar.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 918.7 kB (63%)

Content Size

1.5 MB

After Optimization

548.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Science.dresden.de main page is 1.5 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. 30% of websites need less resources to load. Javascripts take 567.0 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 167.7 kB

  • Original 186.6 kB
  • After minification 185.6 kB
  • After compression 18.9 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 167.7 kB or 90% of the original size.

Image Optimization

-5%

Potential reduce by 19.1 kB

  • Original 371.5 kB
  • After minification 352.4 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. Science Dresden images are well optimized though.

JavaScript Optimization

-77%

Potential reduce by 434.0 kB

  • Original 567.0 kB
  • After minification 462.5 kB
  • After compression 133.0 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 434.0 kB or 77% of the original size.

CSS Optimization

-87%

Potential reduce by 297.9 kB

  • Original 342.4 kB
  • After minification 327.8 kB
  • After compression 44.5 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. Science.dresden.de needs all CSS files to be minified and compressed as it can save up to 297.9 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (53%)

Requests Now

34

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Science Dresden. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

en

en

139 ms

602 ms

overlib.js

overlib.js

244 ms

calendar.js

calendar.js

335 ms

calendar-setup.js

calendar-setup.js

240 ms

calendar-de.js

calendar-de.js

222 ms

table.js

table.js

218 ms

news.js

news.js

220 ms

topic_legend.js

topic_legend.js

335 ms

printer.js

printer.js

331 ms

notepad_button.js

notepad_button.js

334 ms

embed.js

embed.js

354 ms

onload.js

onload.js

361 ms

prototype.js

prototype.js

662 ms

jquery-2.1.3.min.js

jquery-2.1.3.min.js

570 ms

dsc_ajax.js

dsc_ajax.js

449 ms

hyphenation.js

hyphenation.js

688 ms

dyncssDresden.css

dyncssDresden.css

1212 ms

css_lhdd.php

css_lhdd.php

714 ms

extra.css

extra.css

470 ms

css

css

26 ms

wz_tooltip.js

wz_tooltip.js

478 ms

background_science_calendar.jpg

background_science_calendar.jpg

215 ms

365_logo_dsc.jpg

365_logo_dsc.jpg

215 ms

90_logo_dresden_concept.png

90_logo_dresden_concept.png

112 ms

82_logo_dresden_stadt.jpg

82_logo_dresden_stadt.jpg

216 ms

ladekreis.gif

ladekreis.gif

217 ms

icon_cancel_alpha.png

icon_cancel_alpha.png

204 ms

arrow_dsc_big_right_alpha.png

arrow_dsc_big_right_alpha.png

215 ms

icon_minus_v1_border_half.png

icon_minus_v1_border_half.png

218 ms

arrow_big_double_right_alpha.png

arrow_big_double_right_alpha.png

213 ms

FUDHvzEKSJww3kCxuiAo2A.ttf

FUDHvzEKSJww3kCxuiAo2A.ttf

24 ms

0XxGQsSc1g4rdRdjJKZrNC3USBnSvpkopQaUR-2r7iU.ttf

0XxGQsSc1g4rdRdjJKZrNC3USBnSvpkopQaUR-2r7iU.ttf

23 ms

icon_plus_v1_border_half.png

icon_plus_v1_border_half.png

216 ms

icon_calendar_border_half.png

icon_calendar_border_half.png

262 ms

arrow_big_double_right_alpha.png

arrow_big_double_right_alpha.png

252 ms

997_startbild.jpg

997_startbild.jpg

998 ms

arrow_big_double_top_alpha.png

arrow_big_double_top_alpha.png

261 ms

Accessibility Review

science.dresden.de accessibility score

86

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

science.dresden.de 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

Missing source maps for large first-party JavaScript

SEO Factors

science.dresden.de SEO score

92

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

    DE

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Science.dresden.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Science.dresden.de 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

science.dresden.de

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