AlexaWhoisServer InformationDesktop SpeedMobile SpeedMobile UsabilityHTML ErrorsPingTraceroute

CWI.NL Home

cwi.nl Website Information

Daily Unique Visits: 1,482,360

Daily Page Views: 11,858,880

Income Per Day: $11,859

Estimated Value: $12,807,720

This website is located in Netherlands and is using following IP address 192.16.191.38. See the complete list of popular websites hosted in Netherlands.

cwi.nl is registered under .NL top-level domain. Please check other sites in .NL zone.

Website cwi.nl is using the following name servers:

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

and is probably hosted by Stichting Centrum voor Wiskunde en Informatica. See the full list of other websites hosted by Stichting Centrum voor Wiskunde en Informatica.

The highest website cwi.nl position in Alexa rank database was 996 and the lowest rank position was 987711. Current position of cwi.nl in Alexa rank database is 1028.

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

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

Mobile speed 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.

Advertisement

cwi.nl Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

cwi.nl whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

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

cwi.nl desktop page speed rank

Last tested: 2019-06-21

Desktop Speed Bad
7/100

cwi.nl Desktop Speed Test Quick Summary


priority - 270Enable 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).

Compressing https://www.cwi.nl/++plone++static/components/tiny…/js/tinymce/tinymce.js could save 894.2KiB (76% reduction).
Compressing https://www.cwi.nl/++plone++production/++unique++2…0:24.650643/default.js could save 443.5KiB (71% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/less/theme-compiled.css could save 443.1KiB (83% reduction).
Compressing https://www.cwi.nl/++plone++production/++unique++2…:24.650643/default.css could save 190.6KiB (56% reduction).
Compressing https://www.cwi.nl/++plone++mosaic/++unique++2014-…000003/plone-mosaic.js could save 78.5KiB (78% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/table/plugin.js could save 76.7KiB (76% reduction).
Compressing https://www.cwi.nl/++plone++static/components/jqtree/tree.jquery.js could save 73.9KiB (82% reduction).
Compressing https://www.cwi.nl/++plone++static/components/drop…dropzone-amd-module.js could save 48.1KiB (77% reduction).
Compressing https://www.cwi.nl/ could save 41.1KiB (79% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/paste/plugin.js could save 33.3KiB (70% reduction).
Compressing https://stats.cwi.nl/piwik.js could save 32.5KiB (64% reduction).
Compressing https://www.cwi.nl/++plone++mosaic/++unique++2014-…00003/plone-mosaic.css could save 22.9KiB (82% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…spellchecker/plugin.js could save 18.3KiB (71% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/js/links.js could save 16.9KiB (75% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/lists/plugin.js could save 15.4KiB (76% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/media/plugin.js could save 15.2KiB (72% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…themes/modern/theme.js could save 14.8KiB (71% reduction).
Compressing https://www.cwi.nl/++resource++mockup/relateditems/pattern.js could save 14KiB (74% reduction).
Compressing https://www.cwi.nl/yafowil.plone.js?version=None could save 12.5KiB (84% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/pattern.js could save 11.6KiB (70% reduction).
Compressing https://www.cwi.nl/++resource++mockup/upload/pattern.js could save 11.3KiB (69% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/image/plugin.js could save 11.2KiB (72% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…earchreplace/plugin.js could save 10.9KiB (71% reduction).
Compressing https://www.cwi.nl/++plone++static/components/requirejs-text/text.js could save 10.6KiB (69% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/fullpage/plugin.js could save 8.6KiB (72% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…gins/charmap/plugin.js could save 7.4KiB (67% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…plugins/link/plugin.js could save 6.2KiB (69% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/compat3x/plugin.js could save 5.4KiB (68% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/template/plugin.js could save 4.8KiB (67% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/textpattern/plugin.js could save 4.7KiB (70% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/textcolor/plugin.js could save 4.2KiB (65% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…legacyoutput/plugin.js could save 4.2KiB (65% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/importcss/plugin.js could save 3.6KiB (64% reduction).
Compressing https://www.cwi.nl/yafowil.plone.css?version=None could save 3.5KiB (75% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/layer/plugin.js could save 3.3KiB (65% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/autolink/plugin.js could save 3.2KiB (65% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…s/autoresize/plugin.js could save 3.1KiB (63% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ugins/bbcode/plugin.js could save 2.9KiB (70% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/autosave/plugin.js could save 2.5KiB (61% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…s/fullscreen/plugin.js could save 2.4KiB (68% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…sertdatetime/plugin.js could save 2.2KiB (64% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/templates/link.xml could save 2KiB (71% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/templates/image.xml could save 2KiB (71% reduction).
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).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/visualchars/plugin.js could save 1.6KiB (59% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…gins/advlist/plugin.js could save 1.5KiB (60% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/colorpicker/plugin.js could save 1.5KiB (62% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…gins/preview/plugin.js could save 1.4KiB (56% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/pagebreak/plugin.js could save 1.4KiB (59% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/tabfocus/plugin.js could save 1.4KiB (57% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…plugins/save/plugin.js could save 1.2KiB (61% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…visualblocks/plugin.js could save 1.2KiB (58% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/contextmenu/plugin.js could save 1,019B (51% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/wordcount/plugin.js could save 929B (50% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/emoticons/plugin.js could save 827B (51% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…rectionality/plugin.js could save 794B (54% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…plugins/code/plugin.js could save 752B (48% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ugins/anchor/plugin.js could save 643B (51% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/nonbreaking/plugin.js could save 607B (50% reduction).
Compressing https://www.cwi.nl/++resource++mockup/upload/templates/preview.xml could save 551B (63% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/templates/result.xml could save 447B (60% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…e/plugins/hr/plugin.js could save 308B (48% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/print/plugin.js could save 290B (47% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/templates/selection.xml could save 171B (50% reduction).
Compressing https://www.cwi.nl/plonejsi18n?domain=widgets&language=en-gb could save 153B (33% reduction).

priority - 122Optimize 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).

Compressing https://www.cwi.nl/research/groups/information-access/image.jpg could save 133.1KiB (49% reduction).
Compressing https://www.cwi.nl/research/groups/cryptology/image.jpg could save 126.4KiB (47% reduction).
Compressing https://www.cwi.nl/research/groups/networks-and-optimization/image.jpg could save 111.6KiB (50% reduction).
Compressing https://www.cwi.nl/research/groups/formal-methods/image.jpg could save 103.5KiB (47% reduction).
Compressing https://www.cwi.nl/research/groups/life-sciences-and-health/image.jpg could save 91.1KiB (47% reduction).
Compressing https://www.cwi.nl/research/groups/computational-imaging/image.jpg could save 89.3KiB (57% reduction).
Compressing https://www.cwi.nl/research/groups/intelligent-and…mous-systems/image.jpg could save 81KiB (46% reduction).
Compressing https://www.cwi.nl/research/groups/database-architectures/image.jpg could save 72.6KiB (46% reduction).
Compressing https://www.cwi.nl/research/groups/stochastics/image.jpg could save 61.5KiB (48% reduction).
Compressing https://www.cwi.nl/research/groups/software-analys…ansformation/image.jpg could save 60.2KiB (46% reduction).
Compressing https://www.cwi.nl/research/groups/multiscale-dynamics/image.jpg could save 59.2KiB (45% reduction).
Compressing https://www.cwi.nl/research/groups/scientific-computing/image.jpg could save 56KiB (48% reduction).
Compressing https://www.cwi.nl/research/groups/distributed-and…tive-systems/image.jpg could save 52.6KiB (52% reduction).
Compressing https://www.cwi.nl/research/groups/algorithms-and-complexity/image.jpg could save 51.8KiB (25% reduction).
Compressing https://www.cwi.nl/research/groups/machine-learning/image.jpg could save 28KiB (22% reduction).
Compressing https://www.cwi.nl/front-page-content/language-is-mathematics.png could save 5.8KiB (16% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/twitter_icon.png could save 1.4KiB (43% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/facebook_icon.png could save 1.2KiB (43% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/linked_icon.png could save 1.1KiB (38% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/search_button.png could save 1,017B (66% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/icon_quicklinks.png could save 996B (54% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/quicklink_eye_grey.png could save 932B (78% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/quicklink_eye_dark.png could save 926B (76% reduction).
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).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/icon_latest_news.png could save 900B (51% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/instagram_icon.png could save 784B (38% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/youtube_icon.png could save 614B (37% reduction).

priority - 84Minify 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).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/table/plugin.js could save 32.4KiB (33% reduction).
Minifying https://www.cwi.nl/++plone++static/components/jqtree/tree.jquery.js could save 27.4KiB (31% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/paste/plugin.js could save 22.5KiB (48% reduction).
Minifying https://www.cwi.nl/++plone++static/components/drop…dropzone-amd-module.js could save 18.9KiB (31% reduction).
Minifying https://www.cwi.nl/++plone++mosaic/++unique++2014-…000003/plone-mosaic.js could save 10KiB (11% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…spellchecker/plugin.js could save 9.9KiB (39% reduction).
Minifying https://www.cwi.nl/++resource++mockup/relateditems/pattern.js could save 8.9KiB (48% reduction).
Minifying https://www.cwi.nl/++plone++static/components/requirejs-text/text.js could save 8.7KiB (57% reduction).
Minifying https://www.cwi.nl/++resource++mockup/upload/pattern.js could save 8.3KiB (51% reduction).
Minifying https://www.cwi.nl/++resource++mockup/tinymce/pattern.js could save 8.1KiB (50% reduction).
Minifying https://www.cwi.nl/++resource++mockup/tinymce/js/links.js could save 7.5KiB (34% reduction).
Minifying https://www.cwi.nl/yafowil.plone.js?version=None could save 7KiB (48% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…themes/modern/theme.js could save 6.6KiB (33% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/lists/plugin.js could save 5.8KiB (29% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/media/plugin.js could save 5.7KiB (28% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…earchreplace/plugin.js could save 4.5KiB (30% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/image/plugin.js could save 4.1KiB (27% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/fullpage/plugin.js could save 3.2KiB (27% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…plugins/link/plugin.js could save 2.5KiB (28% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…gins/charmap/plugin.js could save 2.4KiB (23% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…legacyoutput/plugin.js could save 2.3KiB (38% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…s/autoresize/plugin.js could save 2KiB (43% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…/textpattern/plugin.js could save 2KiB (30% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/compat3x/plugin.js could save 1.9KiB (25% reduction).
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).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/layer/plugin.js could save 1.7KiB (33% reduction).
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).
Minifying https://www.cwi.nl/++plone++static/components/tiny…/colorpicker/plugin.js could save 913B (38% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ugins/bbcode/plugin.js could save 904B (22% reduction).
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).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ns/pagebreak/plugin.js could save 688B (29% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…gins/advlist/plugin.js could save 672B (27% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…visualblocks/plugin.js could save 647B (31% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…plugins/save/plugin.js could save 579B (29% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…rectionality/plugin.js could save 514B (36% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ns/emoticons/plugin.js could save 484B (30% reduction).
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 - 45Leverage 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)
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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)
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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/icon_latest_news.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/icon_quicklinks.png (expiration not specified)
https://www.cwi.nl//++theme++cwi-theme/images/instagram_icon.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/search_button.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/images/youtube_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/cwi-part-of-…8177-968ef229bd88.jpeg (expiration not specified)
https://www.cwi.nl/front-page-content/language-is-mathematics.png (expiration not specified)
https://www.cwi.nl/logo.png (expiration not specified)
https://www.cwi.nl/news/2019/in-memoriam-piet-hemk…b9c4-182ee5572f80.jpeg (expiration not specified)
https://www.cwi.nl/nieuws/2019/cwi-researchers-dev…b82f-9e3c01d6c1c3.jpeg (expiration not specified)
https://www.cwi.nl/research/groups/algorithms-and-complexity/image.jpg (expiration not specified)
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https://www.cwi.nl/research/groups/cryptology/image.jpg (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)

priority - 37Minify 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 361.1KiB (64% reduction).

Minifying https://www.cwi.nl//++theme++cwi-theme/less/theme-compiled.css could save 355.1KiB (66% reduction).
Minifying https://www.cwi.nl/++plone++mosaic/++unique++2014-…00003/plone-mosaic.css could save 4.8KiB (18% reduction).
Minifying https://www.cwi.nl/yafowil.plone.css?version=None could save 1.1KiB (25% reduction).

priority - 6Eliminate 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.

Optimize CSS Delivery of the following:

https://www.cwi.nl/++plone++production/++unique++2…:24.650643/default.css

priority - 1Minify 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).

Minifying https://www.cwi.nl/ could save 7.9KiB (16% reduction).

priority - 1Reduce server response time

In our test, your server responded in 0.26 seconds.

cwi.nl Desktop Resource Breakdown

Total Resources104
Number of Hosts3
Static Resources90
JavaScript Resources56
CSS Resources4

cwi.nl mobile page speed rank

Last tested: 2017-04-25

Mobile Speed Bad
3/100

cwi.nl Mobile Speed Test Quick Summary


priority - 264Enable 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).

Compressing https://www.cwi.nl/++plone++static/components/tiny…/js/tinymce/tinymce.js could save 894KiB (76% reduction).
Compressing https://www.cwi.nl/++plone++production/++unique++2…0:24.650643/default.js could save 444KiB (71% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/less/theme-compiled.css could save 378.7KiB (83% reduction).
Compressing https://www.cwi.nl/++plone++production/++unique++2…:24.650643/default.css could save 191.8KiB (56% reduction).
Compressing https://www.cwi.nl/++plone++mosaic/++unique++2014-…000003/plone-mosaic.js could save 78.5KiB (78% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/table/plugin.js could save 76.7KiB (76% reduction).
Compressing https://www.cwi.nl/++plone++static/components/jqtree/tree.jquery.js could save 73.9KiB (82% reduction).
Compressing https://www.cwi.nl/++plone++static/components/drop…dropzone-amd-module.js could save 48.1KiB (77% reduction).
Compressing https://www.cwi.nl/ could save 40KiB (79% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/paste/plugin.js could save 33.3KiB (70% reduction).
Compressing https://stats.cwi.nl/piwik.js could save 32.5KiB (64% reduction).
Compressing https://www.cwi.nl/++plone++mosaic/++unique++2014-…00003/plone-mosaic.css could save 22.9KiB (82% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…spellchecker/plugin.js could save 18.3KiB (71% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/js/links.js could save 16.9KiB (75% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/lists/plugin.js could save 15.4KiB (76% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/media/plugin.js could save 15.2KiB (72% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…themes/modern/theme.js could save 14.8KiB (71% reduction).
Compressing https://www.cwi.nl/++resource++mockup/relateditems/pattern.js could save 14KiB (74% reduction).
Compressing https://www.cwi.nl/yafowil.plone.js?version=None could save 12.5KiB (84% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/pattern.js could save 11.6KiB (70% reduction).
Compressing https://www.cwi.nl/++resource++mockup/upload/pattern.js could save 11.3KiB (69% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/image/plugin.js could save 11.2KiB (72% reduction).
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Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/template/plugin.js could save 4.8KiB (67% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/textpattern/plugin.js could save 4.7KiB (70% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/textcolor/plugin.js could save 4.2KiB (65% reduction).
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Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/importcss/plugin.js could save 3.6KiB (64% reduction).
Compressing https://www.cwi.nl/yafowil.plone.css?version=None could save 3.5KiB (75% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…lugins/layer/plugin.js could save 3.3KiB (65% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/autolink/plugin.js could save 3.2KiB (65% reduction).
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Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/autosave/plugin.js could save 2.5KiB (61% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…s/fullscreen/plugin.js could save 2.4KiB (68% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…sertdatetime/plugin.js could save 2.2KiB (64% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/templates/link.xml could save 2KiB (71% reduction).
Compressing https://www.cwi.nl/++resource++mockup/tinymce/templates/image.xml could save 2KiB (71% reduction).
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).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/visualchars/plugin.js could save 1.6KiB (59% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…gins/advlist/plugin.js could save 1.5KiB (60% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/colorpicker/plugin.js could save 1.5KiB (62% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…gins/preview/plugin.js could save 1.4KiB (56% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/pagebreak/plugin.js could save 1.4KiB (59% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ins/tabfocus/plugin.js could save 1.4KiB (57% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…plugins/save/plugin.js could save 1.2KiB (61% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…visualblocks/plugin.js could save 1.2KiB (58% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…/contextmenu/plugin.js could save 1,019B (51% reduction).
Compressing https://www.cwi.nl/++plone++static/components/tiny…ns/wordcount/plugin.js could save 929B (50% reduction).
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Compressing https://www.cwi.nl/++plone++static/components/tiny…/nonbreaking/plugin.js could save 607B (50% reduction).
Compressing https://www.cwi.nl/++resource++mockup/upload/templates/preview.xml could save 551B (63% reduction).

priority - 121Optimize 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).

Compressing https://www.cwi.nl/front-page-content/carousel/ia.jpg could save 133.1KiB (49% reduction).
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Compressing https://www.cwi.nl/front-page-content/carousel/no.jpg could save 111.6KiB (50% reduction).
Compressing https://www.cwi.nl/front-page-content/carousel/fm.jpg could save 103.5KiB (47% reduction).
Compressing https://www.cwi.nl/front-page-content/carousel/ls.jpg could save 91.1KiB (47% reduction).
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Compressing https://www.cwi.nl/front-page-content/carousel/da.jpg could save 72.6KiB (46% reduction).
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Compressing https://www.cwi.nl//++theme++cwi-theme/images/twitter_icon.png could save 1.4KiB (43% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/facebook_icon.png could save 1.2KiB (43% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/linked_icon.png could save 1.1KiB (38% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/submenu_icon.png could save 940B (81% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/quicklink_eye_grey.png could save 932B (78% reduction).
Compressing https://www.cwi.nl//++theme++cwi-theme/images/quicklink_eye_dark.png could save 926B (76% reduction).
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 - 84Minify 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).

Minifying https://www.cwi.nl/++plone++static/components/tiny…/js/tinymce/tinymce.js could save 582.6KiB (50% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/table/plugin.js could save 32.4KiB (33% reduction).
Minifying https://www.cwi.nl/++plone++static/components/jqtree/tree.jquery.js could save 27.4KiB (31% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/paste/plugin.js could save 22.5KiB (48% reduction).
Minifying https://www.cwi.nl/++plone++static/components/drop…dropzone-amd-module.js could save 18.9KiB (31% reduction).
Minifying https://www.cwi.nl/++plone++mosaic/++unique++2014-…000003/plone-mosaic.js could save 10KiB (11% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…spellchecker/plugin.js could save 9.9KiB (39% reduction).
Minifying https://www.cwi.nl/++resource++mockup/relateditems/pattern.js could save 8.9KiB (48% reduction).
Minifying https://www.cwi.nl/++plone++static/components/requirejs-text/text.js could save 8.7KiB (57% reduction).
Minifying https://www.cwi.nl/++resource++mockup/upload/pattern.js could save 8.3KiB (51% reduction).
Minifying https://www.cwi.nl/++resource++mockup/tinymce/pattern.js could save 8.1KiB (50% reduction).
Minifying https://www.cwi.nl/++resource++mockup/tinymce/js/links.js could save 7.5KiB (34% reduction).
Minifying https://www.cwi.nl/yafowil.plone.js?version=None could save 7KiB (48% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…themes/modern/theme.js could save 6.6KiB (33% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/lists/plugin.js could save 5.8KiB (29% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/media/plugin.js could save 5.7KiB (28% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…earchreplace/plugin.js could save 4.5KiB (30% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/image/plugin.js could save 4.1KiB (27% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/fullpage/plugin.js could save 3.2KiB (27% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…plugins/link/plugin.js could save 2.5KiB (28% reduction).
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Minifying https://www.cwi.nl/++plone++static/components/tiny…/textpattern/plugin.js could save 2KiB (30% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ins/compat3x/plugin.js could save 1.9KiB (25% reduction).
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).
Minifying https://www.cwi.nl/++plone++static/components/tiny…lugins/layer/plugin.js could save 1.7KiB (33% reduction).
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).
Minifying https://www.cwi.nl/++plone++static/components/tiny…/colorpicker/plugin.js could save 913B (38% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ugins/bbcode/plugin.js could save 904B (22% reduction).
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).
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Minifying https://www.cwi.nl/++plone++static/components/tiny…/visualchars/plugin.js could save 721B (27% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…ns/pagebreak/plugin.js could save 688B (29% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…gins/advlist/plugin.js could save 672B (27% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…visualblocks/plugin.js could save 647B (31% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…plugins/save/plugin.js could save 579B (29% reduction).
Minifying https://www.cwi.nl/++plone++static/components/tiny…rectionality/plugin.js could save 514B (36% reduction).

priority - 65Leverage 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)
https://www.cwi.nl/news/2017/rubicon-grants-for-da…ca/@@images/image/tile (expiration not specified)
https://www.cwi.nl/news/2017/stokhos-and-lis-gmbh-…er/@@images/image/tile (expiration not specified)
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 - 64Eliminate 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.

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

Optimize CSS Delivery of the following:

https://www.cwi.nl/++plone++production/++unique++2…:24.650643/default.css
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 - 32Minify 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).

Minifying https://www.cwi.nl//++theme++cwi-theme/less/theme-compiled.css could save 308.3KiB (67% reduction).
Minifying https://www.cwi.nl/++plone++mosaic/++unique++2014-…00003/plone-mosaic.css could save 4.8KiB (18% reduction).
Minifying https://www.cwi.nl/yafowil.plone.css?version=None could save 1.1KiB (25% reduction).

priority - 16Prioritize 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 67% of the final above-the-fold content could be rendered with the full HTML response.

priority - 1Minify 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).

Minifying https://www.cwi.nl/ could save 10.9KiB (22% reduction).

cwi.nl Mobile Resource Breakdown

Total Resources99
Number of Hosts3
Static Resources87
JavaScript Resources56
CSS Resources4

cwi.nl mobile page usability

Last tested: 2017-04-25

Mobile Usability Good
99/100

cwi.nl Mobile Usability Test Quick Summary


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="https://www.cwi.nl/@@search">Advanced Search…</a> is close to 1 other tap targets.

cwi.nl HTML validation

Warnings

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

Line: 7 Column: 7188 - 7216
"...-content"><section id="portal-toolbar"> <..." Line: 117 Column: 11 - 46
"... <section id="viewlet-above-content"><nav i..." Line: 168 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 189 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 210 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 231 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 252 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 273 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 294 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 315 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 336 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 357 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 378 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 399 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 420 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 441 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 462 Column: 7 - 71
"...e"> <section class="portlet portletNavigationTree" role="navigation"> ..." Line: 160 Column: 7 - 71
"...iv> <section class="portlet portletNavigationTree" role="navigation"> <scr..." Line: 659 Column: 3 - 34
"...header> <section class="portletContent"> <..." Line: 654 Column: 1 - 39
"...56e7473"> <section class="portlet portletEvents"> <h..." Line: 833 Column: 328 - 401
"...696e6b73"><section class="portlet portletCollection portlet-collection-quick-links"><heade..." Line: 954 Column: 17 - 25
"... <section> ..."

The “banner” role is unnecessary for element “header”.

Line: 9 Column: 7 - 48
"...r"> <header id="content-header" role="banner"> ..."

The “main” role is unnecessary for element “main”.

Line: 145 Column: 9 - 92
"...> <main id="main-container" class="row row-offcanvas row-offcanvas-right" role="main"> ..."

Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.

Line: 156 Column: 11 - 32
"... <article id="content"> ..."

The “contentinfo” role is unnecessary for element “footer”.

Line: 950 Column: 5 - 58
".../div> <footer id="portal-footer-wrapper" role="contentinfo"> ..."

Errors

Element “script” must not have attribute “charset” unless attribute “src” is also specified.

Line: 161 Column: 2 - 48
"...gation"> <script type="text/javascript" charset="utf-8"> va..."

Attribute “viewport” not allowed on element “svg” at this point.

Line: 172 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 193 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 214 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 235 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 256 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 277 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 298 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 319 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 340 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 361 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 382 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 403 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 424 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 445 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..." Line: 466 Column: 13 - 142
"... <svg x="0px" y="0px" width="202.18px" height="106.699px" viewport="0 0 202.18 106.699" enable-background="new 0 0 202.18 106.699"> ..."

Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Line: 489 Column: 8 - 29
"...n> <div class="tileItem"> <a ..." Line: 515 Column: 8 - 29
"...n> <div class="tileItem"> <a ..." Line: 541 Column: 8 - 29
"...n> <div class="tileItem"> <a ..."

The element “h3” must not appear as a descendant of the “address” element.

Line: 961 Column: 21 - 24
"... <h3>Addres..." Line: 974 Column: 21 - 24
"... <h3>Contac..."

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cwi.nl 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.

cwi.nl 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.