3.9 sec in total
862 ms
2.8 sec
195 ms
Visit rrzk.uni-koeln.de now to see the best up-to-date RRZK Uni Koeln content for Germany and also check out these interesting facts you probably never knew about rrzk.uni-koeln.de
Das RRZK ist zentraler IT-Dienstleister der Universität zu Köln. Wir betreuen Infrastrukturen, beraten Sie persönlich und bieten HPC-Services.
Visit rrzk.uni-koeln.deWe analyzed Rrzk.uni-koeln.de page load time and found that the first response time was 862 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
rrzk.uni-koeln.de performance score
name
value
score
weighting
Value2.9 s
54/100
10%
Value7.4 s
4/100
25%
Value4.7 s
69/100
10%
Value120 ms
97/100
30%
Value0.21
59/100
15%
Value5.2 s
75/100
10%
862 ms
190 ms
842 ms
191 ms
191 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 Rrzk.uni-koeln.de, 3% (1 request) were made to Piwik.rrz.uni-koeln.de. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Rrzk.uni-koeln.de.
Page size can be reduced by 669.9 kB (10%)
6.9 MB
6.3 MB
In fact, the total size of Rrzk.uni-koeln.de main page is 6.9 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. 45% of websites need less resources to load. Images take 6.2 MB which makes up the majority of the site volume.
Potential reduce by 67.1 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 11.2 kB, which is 14% 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 67.1 kB or 84% of the original size.
Potential reduce by 90.1 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. RRZK Uni Koeln images are well optimized though.
Potential reduce by 196.0 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 196.0 kB or 68% of the original size.
Potential reduce by 316.6 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. Rrzk.uni-koeln.de needs all CSS files to be minified and compressed as it can save up to 316.6 kB or 85% of the original size.
Number of requests can be reduced by 8 (28%)
29
21
The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of RRZK Uni Koeln. 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 JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
rrzk.uni-koeln.de
862 ms
stylesheet_77e5eb3403.css
190 ms
style.min.css
842 ms
extensionanpassungen.css
191 ms
uzkerweiterungen.css
191 ms
griderweiterungen.css
194 ms
rrzk.2015.css
281 ms
javascript_dd82474708.js
283 ms
modernizr.min.js
284 ms
scripts.min.js
470 ms
f012fcaf28.png
842 ms
f309829825.png
841 ms
a85babb3e8.png
1127 ms
d0201694d9.png
1382 ms
1ab9a68dd9.png
1104 ms
RTEmagicC_kurse_01.jpg.jpg
139 ms
svg-sprite.min.svg
905 ms
piwik.js
611 ms
linkedin.svg
912 ms
itunes.svg
912 ms
OpenSans-Regular-webfont.woff
971 ms
OpenSans-Bold-webfont.woff
1011 ms
OpenSans-Semibold-webfont.woff
1011 ms
OpenSans-Italic-webfont.woff
1065 ms
2e0ada2421.png
1008 ms
aa28fc7d63.png
1008 ms
e481432d18.png
1059 ms
f54a6bcd4e.png
1159 ms
13283b2e6c.png
1078 ms
csm_prof-lang-16-9_68cf1e5025.jpg
1084 ms
rrzk.uni-koeln.de accessibility score
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
ARIA IDs are not unique
rrzk.uni-koeln.de best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
rrzk.uni-koeln.de SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
DE
DE
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rrzk.uni-koeln.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 Rrzk.uni-koeln.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.
rrzk.uni-koeln.de
Open Graph description is not detected on the main page of RRZK Uni Koeln. 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: