4.9 sec in total
998 ms
3.8 sec
155 ms
Welcome to opac.duelmen.de homepage info - get ready to check Opac Duelmen best content for Germany right away, or after learning these important things about opac.duelmen.de
Visit opac.duelmen.deWe analyzed Opac.duelmen.de page load time and found that the first response time was 998 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.
opac.duelmen.de performance score
name
value
score
weighting
Value12.9 s
0/100
10%
Value13.4 s
0/100
25%
Value13.0 s
2/100
10%
Value140 ms
95/100
30%
Value0.12
84/100
15%
Value19.1 s
3/100
10%
998 ms
936 ms
465 ms
415 ms
726 ms
Our browser made a total of 25 requests to load all elements on the main page. We found that all of those requests were addressed to Opac.duelmen.de and no external sources were called. The less responsive or slowest element that took the longest time to load (998 ms) belongs to the original domain Opac.duelmen.de.
Page size can be reduced by 78.2 kB (52%)
149.3 kB
71.0 kB
In fact, the total size of Opac.duelmen.de main page is 149.3 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. Only 10% of websites need less resources to load. Javascripts take 94.8 kB which makes up the majority of the site volume.
Potential reduce by 9.4 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 9.4 kB or 74% of the original size.
Potential reduce by 637 B
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. Opac Duelmen images are well optimized though.
Potential reduce by 61.0 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 61.0 kB or 64% of the original size.
Potential reduce by 7.2 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. Opac.duelmen.de needs all CSS files to be minified and compressed as it can save up to 7.2 kB or 77% of the original size.
Number of requests can be reduced by 5 (23%)
22
17
The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opac Duelmen. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for CSS and as a result speed up the page load time.
opac.duelmen.de
998 ms
woload.asp
936 ms
index.asp
465 ms
style.css.asp
415 ms
jquery-1.7.2.min.js
726 ms
konto.css
107 ms
suchfelder.css
107 ms
result.css
209 ms
detail.css
310 ms
register.css
208 ms
false.png
108 ms
home.gif
108 ms
konto.gif
111 ms
info.gif
111 ms
suchtip.gif
111 ms
hilfe.gif
111 ms
fernleihanfragen.gif
211 ms
question.gif
212 ms
b-suche.gif
214 ms
reset.gif
215 ms
profi.gif
213 ms
print.gif
216 ms
OCLC-Logo-weiss.bmp
828 ms
buecherei_eingang.jpg
416 ms
mail.gif
307 ms
opac.duelmen.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-*] attributes do not match their roles
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
opac.duelmen.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
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
opac.duelmen.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
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Opac.duelmen.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 Opac.duelmen.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.
opac.duelmen.de
Open Graph description is not detected on the main page of Opac Duelmen. 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: