Analyze Leipziger Stadtwerke Portal

energie21 ist das Online Strom- und Gasangebot der Leipziger Stadtwerke. Stellen Sie sich individuell Ihren Strom- oder Gastarif zusammen & bestellen Sie online.

Page load speed analysis

  • 60/100

    Normal result
  • 6

    Successful tests
  • 2

    Failed tests
  • First response

    320 ms

  • Resources loaded

    3.2 sec

  • Page rendered

    268 ms

  • Total page load time

    3.8 sec

Click here to check amazing Energie 21 Online content for Germany. Otherwise, check out these important facts you probably never knew about

We analyzed page load time and found that the first response time was 320 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 38.4 kB
    Images 217.9 kB
    Javascripts 641.4 kB
    CSS 88.9 kB

    In fact, the total size of main page is 986.6 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. 40% of websites need less resources to load. Javascripts take 641.4 kB which makes up the majority of the site volume.

    • Original 38.4 kB
    • After minification 28.8 kB
    • After compression 7.6 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 9.5 kB, which is 25% 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 30.8 kB or 80% of the original size.

    • Original 217.9 kB
    • After optimization 176.9 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. Obviously, Energie 21 Online needs image optimization as it can save up to 41.0 kB or 19% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

    • Original 641.4 kB
    • After minification 590.9 kB
    • After compression 184.2 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 457.3 kB or 71% of the original size.

    • Original 88.9 kB
    • After minification 66.4 kB
    • After compression 14.5 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. needs all CSS files to be minified and compressed as it can save up to 74.4 kB or 84% of the original size.

Network requests diagram

  • contractCreationExternal;jsessionid=57F73CCFC25C2EC77109AD8246B81CEA
  • style.css
  • jquery-autocomplete.css
  • datepicker.css
  • jquery-1.7.1.min.js
  • jquery.selectboxes-2.2.4.min.js
  • jquery.autocomplete-1.1.min.js
  • jquery.qtip-1.0.min.js
  • jquery.blockui-2.3.3.min.js
  • jquery.ui.core.min.js
  • jquery.ui.datepicker.min.js
  • common.js
  • popup.js
  • poco.js
  • buttonFix.js
  • SWLGStyles.js
  • acrobat-detection.js
  • e.js
  • plugins.js
  • script.js
  • history.js
  • conversion.js
  • bat.js
  • video_placeholder.png
  • jquery-1.8.3.min.js
  • t.js
  • lz.css
  • server.php
  • jquery.ui.a.min.js
  • swl-sprite.png
  • bg-main.jpg
  • edge-closer.png
  • bg-energie-21dummy.jpg
  • edge-closer-blue.png
  • sprite-form.png
  • bg_form.gif
  • icon-ssl.png
  • OK-Power-Label.png
  • ZwoWebPro.woff
  • ZwoWebPro-Bold.woff
  • ZwoWebPro-BoldItalic.woff
  • ZwoWebPro-Italic.woff
  • ui-bg_highlight-hard_100_f2f5f7_1x100.png
  • jsbox.js
  • jsglobal.js
  • jstrack.js
  • style.css
  • cnt_js.php
  • cntcc
  • jsextern.js
  • style.css

Our browser made a total of 56 requests to load all elements on the main page. We found that 64% of them (36 requests) were addressed to the original, 13% (7 requests) were made to and 7% (4 requests) were made to The less responsive or slowest element that took the longest time to load (676 ms) relates to the external source

Additional info on


The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Energie 21 Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 30 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.











Possible request optimization













Normal result


As for redirects, our browser reached this domain in two steps. The first redirect led to, then it was forwarded to, and finally we managed to open this domain. We strongly recommend that the redirects should be reduced, as the more redirects a site has, the slower it loads.

IP address

This IP address is dedicated to This is the best domain hosting practice .

Normal result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 3549
NS 3600
NS 3600
NS 3600

3600 Mname:
Serial: 2020032800
Refresh: 86400
Retry: 10800
Expire: 604800
Minimum-ttl: 86400

Language and encoding

Normal result


DE de language flag


EN en language flag





Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it does not match the claimed English language. Our system also found out that 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 has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Poor result

Visitor World Map

Country of origin for 100% of all visits is Germany. It’s good for that their server is also located in Germany, as that enables the majority of their visitors to benefit from a much faster page load time.

Good result

Poor result

Social Sharing Optimization

Open Graph description is not detected on the main page of Energie 21 Online. 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:

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