Analyze Homepage - Open Universiteit

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Page load speed analysis

  • 65/100

    Normal result
  • 8

    Successful tests
  • 0

    Failed test
  • First response

    413 ms

  • Resources loaded

    3.5 sec

  • Page rendered

    834 ms

  • Total page load time

    4.8 sec

Click here to check amazing Ou content for Netherlands. Otherwise, check out these important facts you probably never knew about

We analyzed page load time and found that the first response time was 413 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Page optimization

  • HTML 87.5 kB
    Images 192.0 kB
    Javascripts 549.6 kB
    CSS 434.4 kB

    In fact, the total size of main page is 1.3 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. 55% of websites need less resources to load. Javascripts take 549.6 kB which makes up the majority of the site volume.

    • Original 87.5 kB
    • After minification 86.4 kB
    • After compression 17.3 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. 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 70.2 kB or 80% of the original size.

    • Original 192.0 kB
    • After optimization 167.7 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, Ou needs image optimization as it can save up to 24.3 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

    • Original 549.6 kB
    • After minification 544.5 kB
    • After compression 172.3 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 377.2 kB or 69% of the original size.

    • Original 434.4 kB
    • After minification 432.9 kB
    • After compression 62.6 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. needs all CSS files to be minified and compressed as it can save up to 371.8 kB or 86% of the original size.

Network requests diagram

  • jquery.min.js
  • css.jsp
  • application.css
  • barebone.jsp
  • portal_normal.min.css
  • cam5tdb.js
  • plusone.js
  • portal_normal.min.js
  • jquery.M074A.slider.min.js
  • jquery.M086A.min.js
  • rs_embhl_v2_nl_nl.js
  • M003B.min.js
  • jquery.M018E.marquee.min.js
  • jquery.M019E.marquee.min.js
  • jquery.M019E.ajax.min.js
  • conversion.js
  • cb=gapi.loaded_0
  • image_gallery
  • image_gallery
  • image_gallery
  • image_gallery
  • gtm.js
  • sprite_objects_4.png
  • sprite_objects_2.png
  • M086A_content.png
  • M086A_button_states.png
  • M088A_button_states.png
  • sprite_objects.png
  • M074B_button.png
  • O003B_bg.png
  • O003B_li.png
  • O003B_space.png
  • image_gallery
  • sprite_O107.png
  • dc.js
  • analytics.js
  • insight.min.js
  • fbevents.js
  • close_black.png
  • close.png
  • border1.png
  • border2.png
  • loading.gif
  • O003B_first.png
  • O003B_last.png
  • skin_btn_refresh_normal.png
  • skin_btn_refresh_hover.png
  • loader.gif
  • skin_btn_answer_normal.png
  • O106A.gif
  • __utm.gif
  • collect
  • collect
  • ga-audiences
  • print.min.css
  • typography_fallback.min.css

Our browser made a total of 65 requests to load all elements on the main page. We found that 72% of them (47 requests) were addressed to the original, 5% (3 requests) were made to and 3% (2 requests) were made to The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain

Additional info on


The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ou. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.











Possible request optimization













Normal result


As for redirects, our browser was forwarded to before it reached this domain.

IP address 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

DNS records

Type Host Target/ip TTL Other
A 60
NS 86400
NS 86400
NS 86400
NS 86400

Language and encoding

Normal result


NL nl language flag


N/A  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 Dutch is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. 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 a valid and up-to-date SSL certificate that expires on October 18, 2019.

Good result

Visitor World Map

Country of origin for 56.2% of all visits is Netherlands. It’s good for that their server is also located in Netherlands, as that enables the majority of their visitors to benefit from a much faster page load time.

Good result

Good result

Social Sharing Optimization

Open Graph data is detected on the main page of Ou. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

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