Tools & Wizards About Us
hrz.uni-bonn.de screenshot

Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

hrz.uni-bonn.de

University Computer Center — University IT and Data Center

Page Load Speed

4.2 sec in total

First Response

304 ms

Resources Loaded

3.7 sec

Page Rendered

210 ms

hrz.uni-bonn.de screenshot

About Website

Visit hrz.uni-bonn.de now to see the best up-to-date Hrz Uni Bonn content for Germany and also check out these interesting facts you probably never knew about hrz.uni-bonn.de

Hochschulrechenzentrum der Universität Bonn

Visit hrz.uni-bonn.de

Key Findings

We analyzed Hrz.uni-bonn.de page load time and found that the first response time was 304 ms and then it took 3.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

hrz.uni-bonn.de performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.3 s

1/100

10%

LCP (Largest Contentful Paint)

Value28.0 s

0/100

25%

SI (Speed Index)

Value12.9 s

2/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.954

3/100

15%

TTI (Time to Interactive)

Value7.4 s

48/100

10%

Network Requests Diagram

hrz.uni-bonn.de

304 ms

www.hrz.uni-bonn.de

600 ms

www.hrz.uni-bonn.de

883 ms

base-cachekey6907.css

199 ms

unibonnprint-cachekey6605.css

297 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that all of those requests were addressed to Hrz.uni-bonn.de and no external sources were called. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Hrz.uni-bonn.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 66.2 kB (8%)

Content Size

876.2 kB

After Optimization

810.0 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Hrz.uni-bonn.de main page is 876.2 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 839.2 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 22.4 kB

  • Original 28.3 kB
  • After minification 24.8 kB
  • After compression 5.9 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. This page needs HTML code to be minified as it can gain 3.6 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 22.4 kB or 79% of the original size.

Image Optimization

-4%

Potential reduce by 37.0 kB

  • Original 839.2 kB
  • After minification 802.2 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. Hrz Uni Bonn images are well optimized though.

JavaScript Optimization

-78%

Potential reduce by 6.8 kB

  • Original 8.7 kB
  • After minification 5.2 kB
  • After compression 1.9 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 6.8 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 28 (72%)

Requests Now

39

After Optimization

11

  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Hrz Uni Bonn. 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 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

hrz.uni-bonn.de

hrz.uni-bonn.de

304 ms

www.hrz.uni-bonn.de

www.hrz.uni-bonn.de

600 ms

www.hrz.uni-bonn.de

www.hrz.uni-bonn.de

883 ms

base-cachekey6907.css

base-cachekey6907.css

199 ms

unibonnprint-cachekey6605.css

unibonnprint-cachekey6605.css

297 ms

unibonn-cachekey2402.css

unibonn-cachekey2402.css

398 ms

maps-cachekey3460.css

maps-cachekey3460.css

303 ms

collage-cachekey9465.css

collage-cachekey9465.css

346 ms

resourceunibonn.youtube.stylesheetsmain-cachekey8091.css

resourceunibonn.youtube.stylesheetsmain-cachekey8091.css

304 ms

resourceplonetruegallery-portlet-cachekey8430.css

resourceplonetruegallery-portlet-cachekey8430.css

305 ms

ploneCustom-cachekey2948.css

ploneCustom-cachekey2948.css

432 ms

jquery-cachekey8278.js

jquery-cachekey8278.js

500 ms

jquery.json.js

jquery.json.js

434 ms

cookie_plugin.js

cookie_plugin.js

433 ms

cssQuery-cachekey2443.js

cssQuery-cachekey2443.js

536 ms

resourcecollective.flowplayerflowplayer.min-cachekey0147.js

resourcecollective.flowplayerflowplayer.min-cachekey0147.js

492 ms

unibonn_content.js

unibonn_content.js

525 ms

resourcecollage-resourcescollage-cachekey4435.js

resourcecollage-resourcescollage-cachekey4435.js

548 ms

resourceunibonn.audiencemanagement.javascriptsaudiencemanagement-cachekey2574.js

resourceunibonn.audiencemanagement.javascriptsaudiencemanagement-cachekey2574.js

524 ms

main.js

main.js

587 ms

kuputools.js

kuputools.js

617 ms

initcustomtools.js

initcustomtools.js

619 ms

protectemails.js

protectemails.js

620 ms

jquery.base64.min.js

jquery.base64.min.js

628 ms

resourceplonetruegallery-portlet-cachekey1027.js

resourceplonetruegallery-portlet-cachekey1027.js

640 ms

resourceunibonn.shortenerjqtxtex-cachekey6815.js

resourceunibonn.shortenerjqtxtex-cachekey6815.js

681 ms

resourceunibonn.shortenershrtn-cachekey1236.js

resourceunibonn.shortenershrtn-cachekey1236.js

714 ms

input_background.gif

input_background.gif

103 ms

englisch

englisch

99 ms

logo.png

logo.png

103 ms

institutelogo

institutelogo

102 ms

folderimage

folderimage

389 ms

bullet.gif

bullet.gif

102 ms

image_mini

image_mini

196 ms

email.gif

email.gif

237 ms

feed-icon-14x14.png

feed-icon-14x14.png

199 ms

image_icon

image_icon

199 ms

bullet.gif

bullet.gif

197 ms

image_thumb

image_thumb

388 ms

sciebo_elefant.jpg

sciebo_elefant.jpg

1198 ms

image_mini

image_mini

295 ms

spinner.gif

spinner.gif

295 ms

Accessibility Review

hrz.uni-bonn.de accessibility score

55

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

hrz.uni-bonn.de 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

hrz.uni-bonn.de SEO score

75

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

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

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

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Hrz.uni-bonn.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 Hrz.uni-bonn.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

hrz.uni-bonn.de

Open Graph description is not detected on the main page of Hrz Uni Bonn. 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: