Analyze

blackboard.zhdk.ch: ZHdK: Blackboard

Die ZHdK ist die Zuercher Hochschule der Kuenste

Page load speed analysis

  • 63/100

    Normal result
  • 6

    Successful tests
  • 2

    Failed tests
  • First response

    654 ms

  • Resources loaded

    3.4 sec

  • Page rendered

    93 ms

  • Total page load time

    4.2 sec

Click here to check amazing Blackboard ZHdK content for India. Otherwise, check out these important facts you probably never knew about blackboard.zhdk.ch

We analyzed Blackboard.zhdk.ch page load time and found that the first response time was 654 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Page optimization

  • HTML 18.6 kB
    Images 5.9 kB
    Javascripts 214.5 kB
    CSS 158.5 kB

    In fact, the total size of Blackboard.zhdk.ch main page is 397.5 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. 30% of websites need less resources to load. Javascripts take 214.5 kB which makes up the majority of the site volume.

    • Original 18.6 kB
    • After minification 16.2 kB
    • After compression 4.3 kB

    HTML optimization

    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 2.4 kB, which is 13% 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 14.3 kB or 77% of the original size.

    • Original 5.9 kB

    Image optimization

    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. Blackboard ZHdK images are well optimized though.

    • Original 214.5 kB
    • After minification 167.1 kB
    • After compression 52.8 kB

    JavaScript optimization

    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 161.7 kB or 75% of the original size.

    • Original 158.5 kB
    • After minification 119.5 kB
    • After compression 28.6 kB

    CSS optimization

    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. Blackboard.zhdk.ch needs all CSS files to be minified and compressed as it can save up to 129.9 kB or 82% of the original size.

Network requests diagram

  • blackboard.zhdk.ch
  • www.zhdk.ch
  • stylesheet_78c435cbf0.css
  • screen.css
  • subsites.css
  • screen_css.php
  • jquery.min.js
  • common.js
  • piwik.js
  • javascript_e1f314a320.js
  • slightbox.css
  • slimbox.2.0.4.yui.js
  • zhdkmadekplayer.css
  • standard.css
  • mac-other.css
  • ajax.js
  • base1.js
  • base2.js
  • base3.js
  • flowplayer-3.2.6.min.js
  • overlib_defaults.js
  • overlib_zhdk.js
  • jquery-ui.min.js
  • jquery.ui.touch-punch.min.js
  • jquery-ui-1.8.2.custom.css
  • global.css
  • form.css
  • elements.css
  • modules.css
  • content.css
  • elements.css
  • modules.css
  • content.css
  • repository.css
  • print.css
  • content.css
  • misc.css
  • input.css
  • box.css
  • mtagtoolbar.css
  • tree.css
  • tabs.css
  • overlib.css
  • input_generic.css
  • input_builder.css
  • input_itemlist.css
  • misc.css
  • tree.css
  • mtagtoolbar.css
  • tabs.css
  • overlib.css
  • print.css
  • logo_zhdk.png
  • navArrow1Close.gif
  • navArrow1Open.gif
  • navArrow2Close.gif
  • buttonMail.gif
  • specialLine.gif
  • zhdk_context_menu_closed.png

Our browser made a total of 61 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Blackboard.zhdk.ch, 93% (57 requests) were made to Zhdk.ch and 3% (2 requests) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (917 ms) relates to the external source Analytics.zhdk.ch.

Additional info on blackboard.zhdk.ch

Requests

The browser has sent 57 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blackboard ZHdK. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 36 to 1 for CSS and as a result speed up the page load time.

14

Javascripts

7

Images

36

CSS

57

All

Possible request optimization

1

Javascripts

7

Images

1

CSS

48

Optimized

9

All

Normal result

Redirects

As for redirects, our browser reached this domain in three steps. The first redirect led to http://www.zhdk.ch/blackboard/, then it was forwarded to https://www.zhdk.ch/blackboard/, and afterwards it was sent to https://www.zhdk.ch/?blackboard before we finally managed to reach this website. We strongly recommend that the redirects should be reduced, as the more redirects a site has, the slower it loads.

IP address

Blackboard.zhdk.ch uses IP address which is currently shared with 1 other domain. The more sites share the same IP address, the higher the host server’s workload is. It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.

Normal result

IP Trace

blackboard.zhdk.ch

another.zhdk.ch

195.176.247.142

DNS records

Type Host Target/ip TTL Other
A

services0.zhdk.ch

195.176.247.142 300
CNAME

blackboard.zhdk.ch

services0.zhdk.ch 300

Language and encoding

Good result

Language

DE de language flag

Detected

DE de language flag

Claimed

Encoding

UTF-8

Claimed

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blackboard.zhdk.ch 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 Blackboard.zhdk.ch 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.

HTTPS certificate

SSL Certificate

Blackboard.zhdk.ch has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Normal result

Visitor World Map

Country of origin for 34.3% of all visits is India. It lies approximately 4330 miles away from the server location (Switzerland) and such a long distance can negatively affect website speed, as it takes some time for data to travel back and forth between those places. That’s why one of the best ways to speed up Blackboard.zhdk.ch page load time for the majority of users is moving the server to India or just closer to the user base.

Poor result

Poor result

Social Sharing Optimization

Open Graph description is not detected on the main page of Blackboard ZHdK. 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:

blackboard.zhdk.ch

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