cwi.nl website information.

cwi.nl domain name is registered by .NL top-level domain registry. See the other sites registred in .NL domain zone.

Following name servers are specified for cwi.nl domain:

ns2.cwi.nl
dwalin.nikhef.nl
ns1.zurich.surf.net
ns1.cwi.nl

and probably website cwi.nl is hosted by AMAZON-02 - Amazon.com, Inc., US web hosting company. Check the complete list of other most popular websites hosted by AMAZON-02 - Amazon.com, Inc., US hosting company.

According to Alexa traffic rank the highest website cwi.nl position was 996 (in the world). The lowest Alexa rank position was 987711. Now website cwi.nl ranked in Alexa database as number 1119 (in the world).

Website cwi.nl Desktop speed measurement score (7/100) is better than the results of 0.97% of other sites shows that the page desktop performance can be improved.

cwi.nl Mobile usability score (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.

Mobile speed measurement score of cwi.nl (3/100) is better than the results of 0.36% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

Weekly Rank Report

Date	Rank	Change
Nov-06-2024	1,119	-5
Nov-05-2024	1,114	7
Nov-04-2024	1,121	-7
Nov-03-2024	1,114	-1
Nov-02-2024	1,113	0
Nov-01-2024	1,113	1
Oct-31-2024	1,114	-4

cwi.nl Rank History

Alexa can identify the popularity of a website as well as its competitors. It is important for website owners and bloggers to know their Alexa ranking because it shows how many visitors have viewed their web page. It gives them a clear idea of how popular their website is on the internet and the ranking of their competitors.

cwi.nl whois

WHOIS is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system, but is also used for a wider range of other information.

Domain name: cwi.nl
Status: active

Registrar:
SURF B.V.
Moreelsepark 48
3511EP Utrecht
Netherlands

Abuse Contact:
+31.887873000
cert@surfcert.nl

Creation Date: 1986-04-30

Updated Date: 2021-02-23

DNSSEC: yes

Domain nameservers:
ns1.zurich.surf.net
ns1.cwi.nl 192.16.191.8
ns2.cwi.nl 192.16.191.36
dwalin.nikhef.nl

Record maintained by: NL Domain Registry

Copyright notice
No part of this publication may be reproduced, published, stored in a
retrieval system, or transmitted, in any form or by any means,
electronic, mechanical, recording, or otherwise, without prior
permission of the Foundation for Internet Domain Registration in the
Netherlands (SIDN).
These restrictions apply equally to registrars, except in that
reproductions and publications are permitted insofar as they are
reasonable, necessary and solely in the context of the registration
activities referred to in the General Terms and Conditions for .nl
Registrars.
Any use of this material for advertising, targeting commercial offers or
similar activities is explicitly forbidden and liable to result in legal
action. Anyone who is aware or suspects that such activities are taking
place is asked to inform the Foundation for Internet Domain Registration
in the Netherlands.
(c) The Foundation for Internet Domain Registration in the Netherlands
(SIDN) Dutch Copyright Act, protection of authors' rights (Section 10,
subsection 1, clause 1).

cwi.nl server information

Servers Location

IP Address
192.16.191.38

Country
Netherlands

Region
Zuid-Holland

City
Sassenheim

cwi.nl desktop page speed rank

Last tested: 2019-06-21

Desktop Speed Bad

7/100

cwi.nl Desktop Speed Test Quick Summary

priority - 270 Enable 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 2.6MiB (73% reduction).

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Compressing https://www.cwi.nl/++resource++mockup/upload/templates/upload.xml could save 1.8KiB (71% reduction).
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priority - 122 Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 1.2MiB (45% reduction).

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priority - 84 Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 820.5KiB (43% reduction).

Minifying https://www.cwi.nl/++plone++static/components/tiny…/js/tinymce/tinymce.js could save 582.6KiB (50% reduction).
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Minifying https://www.cwi.nl/++resource++mockup/tree/pattern.js could save 1.9KiB (64% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ns/importcss/plugin.js could save 1.8KiB (33% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/autolink/plugin.js could save 1.7KiB (35% reduction).
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Minifying https://www.cwi.nl/++plone++static/components/tiny…ns/textcolor/plugin.js could save 1.6KiB (25% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/template/plugin.js could save 1.6KiB (23% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/autosave/plugin.js could save 1.1KiB (26% reduction).
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Minifying https://www.cwi.nl/++plone++static/components/tiny…gins/preview/plugin.js could save 888B (35% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/tabfocus/plugin.js could save 857B (35% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…/contextmenu/plugin.js could save 820B (42% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…s/fullscreen/plugin.js could save 811B (23% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…/noneditable/plugin.js could save 788B (29% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ns/wordcount/plugin.js could save 747B (40% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…sertdatetime/plugin.js could save 738B (22% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…plugins/code/plugin.js could save 732B (47% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…/visualchars/plugin.js could save 721B (27% reduction).
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Minifying https://www.cwi.nl/++plone++static/components/tiny…/nonbreaking/plugin.js could save 452B (38% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ugins/anchor/plugin.js could save 436B (35% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/print/plugin.js could save 299B (48% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…e/plugins/hr/plugin.js could save 296B (46% reduction).

priority - 45 Leverage 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://stats.cwi.nl/piwik.js (expiration not specified)
https://www.cwi.nl/++plone++mosaic/++unique++2014-…00003/plone-mosaic.css (expiration not specified)
https://www.cwi.nl/++plone++mosaic/++unique++2014-…000003/plone-mosaic.js (expiration not specified)
https://www.cwi.nl/++plone++production/++unique++2…:24.650643/default.css (expiration not specified)
https://www.cwi.nl/++plone++production/++unique++2…0:24.650643/default.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/drop…dropzone-amd-module.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/jqtree/tree.jquery.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/requirejs-text/text.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…gins/advlist/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ugins/anchor/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/autolink/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…s/autoresize/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/autosave/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ugins/bbcode/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…gins/charmap/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…plugins/code/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/colorpicker/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/compat3x/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/contextmenu/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…rectionality/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ns/emoticons/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/fullpage/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…s/fullscreen/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…e/plugins/hr/plugin.js (expiration not specified)
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https://www.cwi.nl/++plone++static/components/tiny…themes/modern/theme.js (expiration not specified)
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https://www.cwi.nl//++theme++cwi-theme/images/disclaimer_icon.png (expiration not specified)
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priority - 37 Minify CSS

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Minify CSS for the following resources to reduce their size by 361.1KiB (64% reduction).

Minifying https://www.cwi.nl//++theme++cwi-theme/less/theme-compiled.css could save 355.1KiB (66% reduction).
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priority - 6 Eliminate render-blocking JavaScript and CSS in above-the-fold content

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Optimize CSS Delivery of the following:

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priority - 1 Minify 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 7.9KiB (16% reduction).

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priority - 1 Reduce server response time

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cwi.nl Desktop Resources

Total Resources	104
Number of Hosts	3
Static Resources	90
JavaScript Resources	56
CSS Resources	4

cwi.nl Desktop Resource Breakdown

cwi.nl mobile page speed rank

Last tested: 2017-04-25

Mobile Speed Bad

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priority - 264 Enable compression

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Compressing https://www.cwi.nl/++plone++static/components/tiny…/js/tinymce/tinymce.js could save 894KiB (76% reduction).
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Compressing https://www.cwi.nl/++resource++mockup/tinymce/templates/link.xml could save 2KiB (71% reduction).
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Compressing https://www.cwi.nl/++resource++mockup/tree/pattern.js could save 1.9KiB (64% reduction).
Compressing https://www.cwi.nl/++resource++mockup/upload/templates/upload.xml could save 1.8KiB (71% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/noneditable/plugin.js could save 1.7KiB (63% reduction).
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Compressing https://www.cwi.nl/++resource++mockup/upload/templates/preview.xml could save 551B (63% reduction).

priority - 121 Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 1.2MiB (45% reduction).

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Compressing https://www.cwi.nl//++theme++cwi-theme/images/disclaimer_icon.png could save 913B (81% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/icon_events.png could save 904B (51% reduction).

priority - 84 Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 818.6KiB (43% reduction).

priority - 65 Leverage 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://stats.cwi.nl/piwik.js (expiration not specified)
https://www.cwi.nl/++plone++mosaic/++unique++2014-…00003/plone-mosaic.css (expiration not specified)
https://www.cwi.nl/++plone++mosaic/++unique++2014-…000003/plone-mosaic.js (expiration not specified)
https://www.cwi.nl/++plone++production/++unique++2…:24.650643/default.css (expiration not specified)
https://www.cwi.nl/++plone++production/++unique++2…0:24.650643/default.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/drop…dropzone-amd-module.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/jqtree/tree.jquery.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/requirejs-text/text.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…gins/advlist/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ugins/anchor/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/autolink/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…s/autoresize/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/autosave/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ugins/bbcode/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…gins/charmap/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…plugins/code/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/colorpicker/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/compat3x/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/contextmenu/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…rectionality/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ns/emoticons/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/fullpage/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…s/fullscreen/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…e/plugins/hr/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…lugins/image/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ns/importcss/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…sertdatetime/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…lugins/layer/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…legacyoutput/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…plugins/link/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…lugins/lists/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…lugins/media/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/nonbreaking/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/noneditable/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ns/pagebreak/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…lugins/paste/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…gins/preview/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…lugins/print/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…plugins/save/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…earchreplace/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…spellchecker/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/tabfocus/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…lugins/table/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ins/template/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ns/textcolor/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/textpattern/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…visualblocks/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/visualchars/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…ns/wordcount/plugin.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…themes/modern/theme.js (expiration not specified)
https://www.cwi.nl/++plone++static/components/tiny…/js/tinymce/tinymce.js (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/disclaimer_icon.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/facebook_icon.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/icon_events.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/linked_icon.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/quicklink_eye_dark.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/quicklink_eye_grey.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/submenu_icon.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/twitter_icon.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/less/museos…oSans_500-webfont.woff (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/less/theme-compiled.css (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/ac.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/ci.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/cr.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/da.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/dis.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/fm.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/ia.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/is.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/ls.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/md.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/ml.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/no.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/sc.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/st.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/carousel/swat.jpg (expiration not specified)
https://www.cwi.nl/front-page-content/cwiib.png (expiration not specified)
https://www.cwi.nl/logo.png (expiration not specified)
https://www.cwi.nl/news/2017/cwi-and-databricks-la…mp/@@images/image/tile (expiration not specified)
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https://www.cwi.nl/++resource++mockup/relateditems/pattern.js (24 hours)
https://www.cwi.nl/++resource++mockup/tinymce/js/links.js (24 hours)
https://www.cwi.nl/++resource++mockup/tinymce/pattern.js (24 hours)
https://www.cwi.nl/++resource++mockup/tree/pattern.js (24 hours)
https://www.cwi.nl/++resource++mockup/upload/pattern.js (24 hours)
https://www.cwi.nl/++resource++plone.app.event/calendar-o.svg (24 hours)

priority - 64 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources and 4 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

https://www.cwi.nl/++plone++production/++unique++2…0:24.650643/default.js
https://www.cwi.nl/++plone++mosaic/++unique++2014-…000003/plone-mosaic.js
https://www.cwi.nl/yafowil.plone.js?version=None

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https://www.cwi.nl/++plone++mosaic/++unique++2014-…00003/plone-mosaic.css
https://www.cwi.nl/yafowil.plone.css?version=None
https://www.cwi.nl//++theme++cwi-theme/less/theme-compiled.css

priority - 32 Minify CSS

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priority - 16 Prioritize visible content

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cwi.nl Mobile Resources

Total Resources	99
Number of Hosts	3
Static Resources	87
JavaScript Resources	56
CSS Resources	4

cwi.nl Mobile Resource Breakdown

cwi.nl mobile page usability

Last tested: 2017-04-25

Mobile Usability Good

99/100

cwi.nl Mobile Usability Test Quick Summary

priority - 0 Size 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.

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cwi.nl Ping

Ping is a networking utility tool to test if a particular host is reachable. It is a diagnostic that checks reachability of a host on an Internet Protocol (IP) network. In a computer network, a ping test is a way of sending messages from one host to another. Aside from checking if the host is connected to a network, ping also gives indicators of the reliability and general speed of the connection.

cwi.nl TRACEROUTE

Traceroute is a network diagnostic tool used to track the pathway taken by a packet on an IP network from source to destination. Traceroute also records the time taken for each hop the packet makes during its route to the destination. Traceroute uses ICMP (Internet Control Message Protocol) echo packets with variable time to live values. The response time of each hop is calculated. To guarantee accuracy, each hop is queried multiple times (usually three times) to better measure the response of that particular hop.

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cwi.nl Desktop Speed Test Quick Summary

priority - 270 Enable compression

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Enable compression for the following resources to reduce their transfer size by 2.6MiB (73% reduction).

priority - 122 Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 1.2MiB (45% reduction).

priority - 84 Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 820.5KiB (43% reduction).

priority - 45 Leverage 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.

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priority - 37 Minify CSS

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priority - 6 Eliminate render-blocking JavaScript and CSS in above-the-fold content

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

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Optimize CSS Delivery of the following:

priority - 1 Minify 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.

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priority - 1 Reduce server response time

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cwi.nl Desktop Resources

cwi.nl Desktop Resource Breakdown

cwi.nl mobile page speed rank

cwi.nl Mobile Speed Test Quick Summary

priority - 264 Enable 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 2.5MiB (73% reduction).

priority - 121 Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 1.2MiB (45% reduction).

priority - 84 Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

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priority - 65 Leverage 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:

priority - 64 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources and 4 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 32 Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 314.3KiB (64% reduction).

priority - 16 Prioritize 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.

priority - 1 Minify 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 10.9KiB (22% reduction).

cwi.nl Mobile Resources

cwi.nl Mobile Resource Breakdown

cwi.nl mobile page usability

cwi.nl Mobile Usability Test Quick Summary

priority - 0 Size 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.

cwi.nl similar domains

cwi.nl Ping

cwi.nl TRACEROUTE