5.4 sec in total
325 ms
4.8 sec
243 ms
Visit es.rub.de now to see the best up-to-date ES Rub content for Germany and also check out these interesting facts you probably never knew about es.rub.de
Startseite des englischen Seminars
Visit es.rub.deWe analyzed Es.rub.de page load time and found that the first response time was 325 ms and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
es.rub.de performance score
name
value
score
weighting
Value2.5 s
67/100
10%
Value3.0 s
79/100
25%
Value3.9 s
83/100
10%
Value0 ms
100/100
30%
Value0.002
100/100
15%
Value2.5 s
98/100
10%
325 ms
97 ms
192 ms
190 ms
897 ms
Our browser made a total of 76 requests to load all elements on the main page. We found that 59% of them (45 requests) were addressed to the original Es.rub.de, 41% (31 requests) were made to Ruhr-uni-bochum.de. The less responsive or slowest element that took the longest time to load (3 sec) belongs to the original domain Es.rub.de.
Page size can be reduced by 382.6 kB (26%)
1.5 MB
1.1 MB
In fact, the total size of Es.rub.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. 40% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.
Potential reduce by 22.8 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 4.6 kB, which is 15% 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 22.8 kB or 76% of the original size.
Potential reduce by 73.8 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. ES Rub images are well optimized though.
Potential reduce by 151.3 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 151.3 kB or 71% of the original size.
Potential reduce by 134.7 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. Es.rub.de needs all CSS files to be minified and compressed as it can save up to 134.7 kB or 84% of the original size.
Number of requests can be reduced by 46 (61%)
75
29
The browser has sent 75 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ES Rub. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 34 to 1 for CSS and as a result speed up the page load time.
es.rub.de
325 ms
1-rub-auswahl-fuer-t1.css
97 ms
stylewechsel.js
192 ms
druckversion.js
190 ms
jquery.min.js
897 ms
jquery.cycle.all.js
996 ms
auswahl-3spaltig-mit-bild.css
1096 ms
shadowbox.css
1099 ms
shadowbox.js
1473 ms
2-rub-basis.css
985 ms
3-rub-raster-fuer-t1.css
187 ms
4-rub-hauptnavigation.css
187 ms
5-rub-inhalt.css
1988 ms
6-rub-marginalspalte.css
1990 ms
slide.css
2999 ms
logo-rub-102.gif
100 ms
base.css
193 ms
rub-quernavigation.css
104 ms
dww-quernavigation-wo-bin-ich.css
106 ms
rub-seitennavigation.css
181 ms
basemod-3spaltig.css
289 ms
kennzeichnung-links.css
195 ms
content.css
198 ms
slide.css
200 ms
rub-print.css
280 ms
iehacks.css
292 ms
logo-rub-102-invers.gif
329 ms
rub-schriftzug.gif
330 ms
rub-schriftzug-invers.gif
330 ms
7-rub-print.css
98 ms
1-rub-kontrast-auswahl-fuer-t1.css
97 ms
2-rub-kontrast-basis.css
133 ms
3-rub-kontrast-raster-fuer-t1.css
129 ms
4-rub-kontrast-hauptnavigation.css
131 ms
5-rub-kontrast-inhalt.css
131 ms
6-rub-kontrast-marginalspalte.css
130 ms
bg1000-left.gif
97 ms
bg-right.gif
96 ms
bg-oben-unterseite-grau136-2.gif
97 ms
bg-oben-unterseite-grau136.gif
99 ms
logo-rub-102.gif
99 ms
rub-schriftzug.gif
99 ms
fl_english.gif
190 ms
pfeil-gruen-klein.gif
190 ms
logoenglsem1.gif
192 ms
pfeil-link-blau-listeinhalt.gif
193 ms
Las_Vegas.jpg
603 ms
CastleGardens04L.jpg
285 ms
pipes.jpg
751 ms
Continental.jpg
374 ms
ForthBridge11L.jpg
376 ms
sevensisters_1.jpg
283 ms
whitby%20abbey.jpg
471 ms
broadway_highstreet.jpg
471 ms
granchester.jpg
563 ms
Monument_Valley.jpg
658 ms
motel1.jpg
940 ms
buffalos.jpg
943 ms
school%20bus.jpg
1037 ms
native%20american%20crafts.jpg
882 ms
1516_summerschool_2016_new.jpg
941 ms
button-next.png
99 ms
button-play.png
103 ms
button-pause.png
101 ms
button-previous.png
102 ms
mailtosw.gif
801 ms
kontrast.gif
894 ms
drucken.gif
933 ms
auswahl-3spaltig-mit-bild.css
101 ms
rub-quernavigation.css
100 ms
dww-quernavigation-wo-bin-ich.css
104 ms
rub-seitennavigation.css
100 ms
basemod-3spaltig.css
101 ms
content.css
196 ms
slide.css
104 ms
rub-print.css
196 ms
es.rub.de accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<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
Image elements do not have [alt] attributes
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
es.rub.de best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
es.rub.de SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
N/A
DE
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Es.rub.de can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is German. Our system also found out that Es.rub.de main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
es.rub.de
Open Graph description is not detected on the main page of ES Rub. 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: