Tools & Wizards About Us
informatik.hu-berlin.de screenshot

Report Summary

  • 36

    Performance

    Renders faster than
    56% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

informatik.hu-berlin.de

Willkommen im Institut für Informatik — Institut für Informatik

Page Load Speed

4.5 sec in total

First Response

408 ms

Resources Loaded

3.9 sec

Page Rendered

149 ms

informatik.hu-berlin.de screenshot

About Website

Click here to check amazing Informatik Hu Berlin content for Germany. Otherwise, check out these important facts you probably never knew about informatik.hu-berlin.de

Visit informatik.hu-berlin.de

Key Findings

We analyzed Informatik.hu-berlin.de page load time and found that the first response time was 408 ms and then it took 4.1 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

informatik.hu-berlin.de performance score

36

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value4.9 s

28/100

25%

SI (Speed Index)

Value6.5 s

39/100

10%

TBT (Total Blocking Time)

Value1,380 ms

16/100

30%

CLS (Cumulative Layout Shift)

Value0.083

93/100

15%

TTI (Time to Interactive)

Value7.6 s

46/100

10%

Network Requests Diagram

informatik.hu-berlin.de

408 ms

de

622 ms

base-cachekey-a7247629f8fca6fa8e19aadc9fbbc431.css

210 ms

resourcecollective.js.colorpicker-cachekey-9dc5aa4bea860473682ad28455239162.css

219 ms

resourcehumboldt.portlet.imagelink-cachekey-26398191ca43e80da52bc558bd4b79e9.css

224 ms

Our browser made a total of 40 requests to load all elements on the main page. We found that 98% of them (39 requests) were addressed to the original Informatik.hu-berlin.de, 3% (1 request) were made to Hu-berlin.de. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Informatik.hu-berlin.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 42.2 kB (31%)

Content Size

136.4 kB

After Optimization

94.2 kB

  • HTML
  • Images

In fact, the total size of Informatik.hu-berlin.de main page is 136.4 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. 35% of websites need less resources to load. Images take 92.8 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 36.5 kB

  • Original 43.7 kB
  • After minification 35.3 kB
  • After compression 7.1 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 8.3 kB, which is 19% 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 36.5 kB or 84% of the original size.

Image Optimization

-6%

Potential reduce by 5.7 kB

  • Original 92.8 kB
  • After minification 87.1 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. Informatik Hu Berlin images are well optimized though.

Requests Breakdown

Number of requests can be reduced by 26 (72%)

Requests Now

36

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Informatik Hu Berlin. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

informatik.hu-berlin.de

informatik.hu-berlin.de

408 ms

de

de

622 ms

base-cachekey-a7247629f8fca6fa8e19aadc9fbbc431.css

base-cachekey-a7247629f8fca6fa8e19aadc9fbbc431.css

210 ms

resourcecollective.js.colorpicker-cachekey-9dc5aa4bea860473682ad28455239162.css

resourcecollective.js.colorpicker-cachekey-9dc5aa4bea860473682ad28455239162.css

219 ms

resourcehumboldt.portlet.imagelink-cachekey-26398191ca43e80da52bc558bd4b79e9.css

resourcehumboldt.portlet.imagelink-cachekey-26398191ca43e80da52bc558bd4b79e9.css

224 ms

resourceeasyslider-portlet-cachekey-baee1d7bf30510f4153916da3830226a.css

resourceeasyslider-portlet-cachekey-baee1d7bf30510f4153916da3830226a.css

223 ms

huLSF-cachekey-e5b638e848bd668b2282767cb12646bf.css

huLSF-cachekey-e5b638e848bd668b2282767cb12646bf.css

221 ms

resourceqi.portlet.TagClouds.stylesheetstagclouds-cachekey-cf8303a594d99788e4bd208fd13bb582.css

resourceqi.portlet.TagClouds.stylesheetstagclouds-cachekey-cf8303a594d99788e4bd208fd13bb582.css

224 ms

resourcehumboldt.viewlet.sharelinkmenu-cachekey-515d95f22ef5d163ed6b1ca6b71c7498.css

resourcehumboldt.viewlet.sharelinkmenu-cachekey-515d95f22ef5d163ed6b1ca6b71c7498.css

414 ms

solgema_contextualcontentmenu-cachekey-49cb50af5511ff7e12ba8233eefc7c2e.css

solgema_contextualcontentmenu-cachekey-49cb50af5511ff7e12ba8233eefc7c2e.css

415 ms

resourceplone.formwidget.datetimestyles-cachekey-67f571bf664bc01dd6e38d77ca3eac21.css

resourceplone.formwidget.datetimestyles-cachekey-67f571bf664bc01dd6e38d77ca3eac21.css

417 ms

ploneboard-cachekey-8634fe154f1dfa5a3a05c35ec8e3c581.css

ploneboard-cachekey-8634fe154f1dfa5a3a05c35ec8e3c581.css

421 ms

resourcecalendar_stylescalendar-cachekey-4594a3a024a639b7fb8a2757f98060d7.css

resourcecalendar_stylescalendar-cachekey-4594a3a024a639b7fb8a2757f98060d7.css

422 ms

huEmployee-cachekey-04a159400ab6cbcb9e6d37f4920837c1.css

huEmployee-cachekey-04a159400ab6cbcb9e6d37f4920837c1.css

437 ms

resourceplone.formwidget.recurrencejquery.recurrenceinput-cachekey-83d073217dfe9a5ba400bbde620c2894.css

resourceplone.formwidget.recurrencejquery.recurrenceinput-cachekey-83d073217dfe9a5ba400bbde620c2894.css

623 ms

resourcehumboldt.frontpageslider.cssjquery.bxslider-cachekey-df4153e19edd2fc85e09ca4a1e26763e.css

resourcehumboldt.frontpageslider.cssjquery.bxslider-cachekey-df4153e19edd2fc85e09ca4a1e26763e.css

624 ms

themehumboldt.theme.diazocolors-cachekey-e21ba091a643ca128b0f4de9458c4700.css

themehumboldt.theme.diazocolors-cachekey-e21ba091a643ca128b0f4de9458c4700.css

624 ms

compiled_styles.css

compiled_styles.css

625 ms

resourceplone.app.jquery-cachekey-9f57f7c75b568be682d2139420b211fb.js

resourceplone.app.jquery-cachekey-9f57f7c75b568be682d2139420b211fb.js

1071 ms

resourceplone.formwidget.autocompletejquery.autocomplete.min-cachekey-b146a5b4fd3fdd12c768bb3ccf758816.js

resourceplone.formwidget.autocompletejquery.autocomplete.min-cachekey-b146a5b4fd3fdd12c768bb3ccf758816.js

652 ms

resourcecollective.js.colorpicker.jseye-cachekey-f4ab6e2ff042f1e0b1082480d3d58111.js

resourcecollective.js.colorpicker.jseye-cachekey-f4ab6e2ff042f1e0b1082480d3d58111.js

833 ms

resourceeasyslider-portlet-cachekey-227801b407e7b97b99cd10e6f379dee2.js

resourceeasyslider-portlet-cachekey-227801b407e7b97b99cd10e6f379dee2.js

829 ms

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slimbox2-cachekey-1689b03c338240a8f24fb398d4f7e8a6.js

931 ms

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less.min-cachekey-7e656bc8246f046da2fa903403fa31d9.js

932 ms

ckeditor_vars-cachekey-55e00bcf611d758d13c77b3d7160cd41.js

ckeditor_vars-cachekey-55e00bcf611d758d13c77b3d7160cd41.js

859 ms

resourcejsi18n-cachekey-847337d72d20e50883802a06fcd6b015.js

resourcejsi18n-cachekey-847337d72d20e50883802a06fcd6b015.js

1039 ms

kss-bbb-cachekey-02ca2a0d02fadccee7d3d94bd4df9e33.js

kss-bbb-cachekey-02ca2a0d02fadccee7d3d94bd4df9e33.js

1167 ms

resourceplone.formwidget.recurrencejquery.tmpl-beta1-cachekey-97c9d704ed71318e53e15ba4f7f302aa.js

resourceplone.formwidget.recurrencejquery.tmpl-beta1-cachekey-97c9d704ed71318e53e15ba4f7f302aa.js

1068 ms

resourcehumboldt.folderimage.folderimage-cachekey-2a74e7d2819a789184d72c5c586ba00b.js

resourcehumboldt.folderimage.folderimage-cachekey-2a74e7d2819a789184d72c5c586ba00b.js

1178 ms

bullet.gif

bullet.gif

313 ms

++resource++humboldt.logo.Logo.jpg

++resource++humboldt.logo.Logo.jpg

216 ms

informatik.jpg

informatik.jpg

414 ms

search.png

search.png

209 ms

printlogo.png

printlogo.png

210 ms

globe.png

globe.png

212 ms

head-left-image.jpg

head-left-image.jpg

645 ms

sprite.png

sprite.png

211 ms

spinner.gif

spinner.gif

415 ms

head-left-image.jpg

head-left-image.jpg

323 ms

resourcehumboldt.theme.stylesprint-cachekey-a72596e849f1794a18156a0a6d211e9d.css

resourcehumboldt.theme.stylesprint-cachekey-a72596e849f1794a18156a0a6d211e9d.css

219 ms

Accessibility Review

informatik.hu-berlin.de accessibility score

80

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

[aria-*] attributes are not valid or misspelled

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

[id] attributes on active, focusable elements are not unique

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

Links do not have a discernible name

Best Practices

informatik.hu-berlin.de best practices score

67

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

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

informatik.hu-berlin.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

    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 Informatik.hu-berlin.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 Informatik.hu-berlin.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

informatik.hu-berlin.de

Open Graph description is not detected on the main page of Informatik Hu Berlin. 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: