Tools & Wizards About Us
tzi.de screenshot

Report Summary

  • 40

    Performance

    Renders faster than
    59% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

tzi.de

Technologie-Zentrum Informatik und Informationstechnik - Universität Bremen

Page Load Speed

6.1 sec in total

First Response

432 ms

Resources Loaded

5.3 sec

Page Rendered

364 ms

tzi.de screenshot

About Website

Click here to check amazing Tzi content for Germany. Otherwise, check out these important facts you probably never knew about tzi.de

Das Technologie-Zentrum Informatik und Informationstechnik (TZI) der Universität Bremen steht mit seinen Forschungsthemen im Zentrum eines massiven Umbruchs in der Gesellschaft: Die digitale Revolutio...

Visit tzi.de

Key Findings

We analyzed Tzi.de page load time and found that the first response time was 432 ms and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

tzi.de performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value17.5 s

0/100

25%

SI (Speed Index)

Value5.7 s

50/100

10%

TBT (Total Blocking Time)

Value900 ms

32/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value5.5 s

71/100

10%

Network Requests Diagram

tzi.de

432 ms

tzi.de

480 ms

773 ms

news-basic.css

221 ms

news.css

332 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Tzi.de, 71% (29 requests) were made to Uni-bremen.de and 12% (5 requests) were made to Youtube-nocookie.com. The less responsive or slowest element that took the longest time to load (2.7 sec) relates to the external source Uni-bremen.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 424.7 kB (7%)

Content Size

6.2 MB

After Optimization

5.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tzi.de main page is 6.2 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 5.6 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 176.3 kB

  • Original 210.8 kB
  • After minification 195.6 kB
  • After compression 34.5 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. 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 176.3 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 3.9 kB

  • Original 5.6 MB
  • After minification 5.6 MB

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. Tzi images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 244.5 kB

  • Original 404.1 kB
  • After minification 403.9 kB
  • After compression 159.6 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 244.5 kB or 61% of the original size.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 58.6 kB
  • After minification 58.6 kB
  • After compression 58.6 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. Tzi.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 12 (41%)

Requests Now

29

After Optimization

17

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tzi. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

tzi.de

tzi.de

432 ms

tzi.de

tzi.de

480 ms

773 ms

news-basic.css

news-basic.css

221 ms

news.css

news.css

332 ms

merged-734794536a98749bd4134bcbf92dc2d2-min.css.gzip

merged-734794536a98749bd4134bcbf92dc2d2-min.css.gzip

664 ms

merged-0ac6282b9fe882a26dcec088f8b20289-min.js.gzip

merged-0ac6282b9fe882a26dcec088f8b20289-min.js.gzip

445 ms

b7sectionindex.min-min.js.gzip

b7sectionindex.min-min.js.gzip

334 ms

cookieOptin.css

cookieOptin.css

343 ms

cookieOptin.js

cookieOptin.js

458 ms

merged-87d65c31a0d73ff34bc1bf9f1ab5dd1e-min.js.gzip

merged-87d65c31a0d73ff34bc1bf9f1ab5dd1e-min.js.gzip

447 ms

b7publicmessage.min-min.js.gzip

b7publicmessage.min-min.js.gzip

335 ms

logo_ub_2021.png

logo_ub_2021.png

115 ms

TZI-solo_JPEG.jpg

TZI-solo_JPEG.jpg

117 ms

ls_ub_black.svg

ls_ub_black.svg

115 ms

gbs_ub_black.svg

gbs_ub_black.svg

189 ms

skipper.png

skipper.png

190 ms

uhb_background_navi.png

uhb_background_navi.png

116 ms

csm_Navigatone_bb74e0242b.jpg

csm_Navigatone_bb74e0242b.jpg

1523 ms

csm_Roboter_PR2_Pfannkuchen_2dd7f8ef54.jpg

csm_Roboter_PR2_Pfannkuchen_2dd7f8ef54.jpg

2735 ms

csm_unnamed__9__748e65d224.jpg

csm_unnamed__9__748e65d224.jpg

1246 ms

pixel.png

pixel.png

501 ms

JPo4exqVC6I

JPo4exqVC6I

152 ms

SharpSans-Medium.woff

SharpSans-Medium.woff

454 ms

SharpSans-Bold.woff

SharpSans-Bold.woff

452 ms

fa-v4compatibility.ttf

fa-v4compatibility.ttf

843 ms

fa-regular-400.ttf

fa-regular-400.ttf

844 ms

fa-brands-400.ttf

fa-brands-400.ttf

933 ms

fa-solid-900.ttf

fa-solid-900.ttf

933 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

845 ms

uhb_background_footer.png

uhb_background_footer.png

818 ms

www-player.css

www-player.css

263 ms

www-embed-player.js

www-embed-player.js

310 ms

base.js

base.js

384 ms

csm_TZI-Roadshow1_6a59fd18f6.jpg

csm_TZI-Roadshow1_6a59fd18f6.jpg

751 ms

LvMrC3vzHFP8SzxjvqNWRksbkOPiJTf11ILX4Pq8Ybc.js

LvMrC3vzHFP8SzxjvqNWRksbkOPiJTf11ILX4Pq8Ybc.js

138 ms

embed.js

embed.js

86 ms

KFOmCnqEu92Fr1Mu4mxM.woff

KFOmCnqEu92Fr1Mu4mxM.woff

165 ms

KFOlCnqEu92Fr1MmEU9fBBc-.woff

KFOlCnqEu92Fr1MmEU9fBBc-.woff

165 ms

Create

Create

168 ms

GenerateIT

GenerateIT

15 ms

Accessibility Review

tzi.de accessibility score

88

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[role]s are not contained by their required parent element

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

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

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

tzi.de best practices score

83

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

tzi.de SEO score

92

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

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tzi.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it matches the claimed language. Our system also found out that Tzi.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

tzi.de

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