UNI-MAINZ.DE Johannes Gutenberg-Universität Mainz

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Last tested: 2016-08-12


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36/100

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priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://css.uni-mainz.de/js/jquery_bootstrap.min.js?v=1475065122
https://scripts.zdv.uni-mainz.de/js/js_lib_neu.min.js
https://css.uni-mainz.de/js/jgu.min.js?v=

Optimize CSS Delivery of the following:

https://css.uni-mainz.de/css/jgu_style.min.css?v=1520864695

priority - 47Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://www.uni-mainz.de/Bilder_allgemein/banner_p…studium_190pxbreit.jpg (expiration not specified)
https://www.uni-mainz.de/Bilder_allgemein/startsei…RISMA_rdax_834x334.jpg (expiration not specified)
https://www.uni-mainz.de/Illustrationen/05_philoso…ainz_group_150x100.jpg (expiration not specified)
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https://www.uni-mainz.de/Illustrationen/08_physik_na62_150x100.jpg (expiration not specified)
https://www.uni-mainz.de/Illustrationen/10_bio_imp…chutzpille_250x150.jpg (expiration not specified)
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https://www.uni-mainz.de/Illustrationen/thumbnail_titelblatt.JPG (expiration not specified)
https://css.uni-mainz.de/css/jgu_style.min.css?v=1520864695 (24 hours)

priority - 34Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://uni-mainz.de/
https://uni-mainz.de/
https://www.uni-mainz.de/

priority - 24Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.

Only about 50% of the final above-the-fold content could be rendered with the full HTML response.

priority - 11Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 106.1KiB (86% reduction).

Compressing https://www.uni-mainz.de/ could save 106.1KiB (86% reduction).

priority - 5Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 49.1KiB (41% reduction).

Minifying https://www.uni-mainz.de/ could save 49.1KiB (41% reduction).

uni-mainz.de Mobile Resource Breakdown

Total Resources69
Number of Hosts4
Static Resources66
JavaScript Resources3
CSS Resources1

uni-mainz.de mobile page usability

Last tested: 2018-03-21


Mobile Usability Good
96/100

uni-mainz.de Mobile Usability Test Quick Summary


priority - 3Size content to viewport

The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.

The page content is 414 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:

The element <div class="col-sm-4 col-md-4 col-xs-12">VERANSTALTUNGE…LTUNGSKALENDER</div> falls outside the viewport.
The element <div class="col-sm-4 col-md-4 col-xs-12">VIDEO…ION UND PRESSE</div> falls outside the viewport.

priority - 0Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="#jgu_carousel_id_50" class="left carousel-…trol-area-left">Zurück</a> and 3 others are close to other tap targets.

The tap target <a href="/144.php">Datenschutz</a> and 1 others are close to other tap targets.

uni-mainz.de HTML validation

Errors

Start tag “a” seen but an element of the same type was already open.

Line: 33 Column: 16 - 58
"... <a href="//www.uni-mainz.de" target="_top"><span ..."

End tag “a” violates nesting rules.

Line: 33 Column: 16 - 58
"... <a href="//www.uni-mainz.de" target="_top"><span ..."

Cannot recover after last error. Any further errors will be ignored.

Line: 33 Column: 16 - 58
"... <a href="//www.uni-mainz.de" target="_top"><span ..."

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uni-mainz.de Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.


uni-mainz.de TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.