4.8 sec in total
484 ms
4.1 sec
225 ms
Welcome to ert.cern.ch homepage info - get ready to check Ert CERN best content for United States right away, or after learning these important things about ert.cern.ch
Visit ert.cern.chWe analyzed Ert.cern.ch page load time and found that the first response time was 484 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.
ert.cern.ch performance score
name
value
score
weighting
Value7.1 s
1/100
10%
Value8.0 s
3/100
25%
Value9.4 s
13/100
10%
Value100 ms
98/100
30%
Value0.001
100/100
15%
Value7.7 s
46/100
10%
484 ms
564 ms
175 ms
193 ms
194 ms
Our browser made a total of 64 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Ert.cern.ch, 52% (33 requests) were made to Jobs.web.cern.ch and 11% (7 requests) were made to Pbs.twimg.com. The less responsive or slowest element that took the longest time to load (893 ms) relates to the external source Framework.web.cern.ch.
Page size can be reduced by 403.5 kB (23%)
1.7 MB
1.3 MB
In fact, the total size of Ert.cern.ch main page is 1.7 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. 50% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 44.4 kB
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 44.4 kB or 80% of the original size.
Potential reduce by 64.8 kB
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. Ert CERN images are well optimized though.
Potential reduce by 240.4 kB
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 240.4 kB or 61% of the original size.
Potential reduce by 53.9 kB
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. Ert.cern.ch needs all CSS files to be minified and compressed as it can save up to 53.9 kB or 78% of the original size.
Number of requests can be reduced by 31 (53%)
58
27
The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ert CERN. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
ert.cern.ch
484 ms
jobs.web.cern.ch
564 ms
css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css
175 ms
css_vZ_wrMQ9Og-YPPxa1q4us3N7DsZMJa-14jShHgRoRNo.css
193 ms
css_FeAf9vgVwW3fRbg4JwhdzfSpBJkilyyqwHFYwjZCmWw.css
194 ms
css_GzZeU-8Y6rqyHgqMpNCmo1WMmAdQY8mk1UbLYZFGxAA.css
185 ms
css_g_NQ1yKfLoqkzzT-lTqVRtBcXGtBOZ0-7dAukiJBqQo.css
187 ms
css_z6wp14CSQifYvPgo_9AEyfq1X--iCRBQrCKu50EwXi8.css
189 ms
js_jpJjaUC0z8JMIyav5oQrYykDRUb64rpaUDpB4Y9aklU.js
529 ms
js_obFUyTbqtcoGQtszVI46l1_oD927PzlDtlr_ilpYBqE.js
281 ms
js_8Gn7T24wEc8AG4NKlVxgf8hTI_mtnesY6qUkt-ackww.js
280 ms
js_Pey2oVKuAP14agbxeDxoQf_TtuqE3XZmjfIaouh3Ueo.js
279 ms
js_3kVkVmOr8HmLPzOXjB87ibe92BVJzAtGwxTYwwnUHAE.js
361 ms
js_5mFV5fwz4Qg693uKmnmgCBKNIQZwqbKJlBGOxxHs5g4.js
279 ms
js_43n5FBy8pZxQHxPXkf-sQF7ZiacVZke14b0VlvSA554.js
369 ms
analytics.js
164 ms
CERN-MOVIE-2015-039-001
757 ms
twitter-bird-light-bgs.png
392 ms
feedback_simple.gif
149 ms
eventbanner.jpg
799 ms
linkedin.png
147 ms
facebook.jpg
147 ms
twitter.png
147 ms
youtube.png
147 ms
rss.png
206 ms
glassbox.png
205 ms
android.png
288 ms
app_store.png
380 ms
druplicon.png
204 ms
select-arrow.gif
293 ms
widgets.js
117 ms
cern-logo-large.png
162 ms
extlink_s.png
161 ms
staf900.jpg
605 ms
doct_900.jpg
781 ms
graduate_900.jpg
693 ms
fell900.jpg
555 ms
shadow.png
342 ms
collect
24 ms
timeline.d11f7a3b3287fb94220e8ee6d03cc772.js
119 ms
syndication
105 ms
294480390842875904
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timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css
32 ms
timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css
70 ms
e9cec51acfb31cb0c3e40ad11489340e_normal.jpeg
126 ms
RPiEyveo_normal.jpeg
150 ms
CcsucFHWwAAOigI.jpg:small
186 ms
CdCSt8MWAAIx3K1.jpg:small
249 ms
Cct5ZtwXEAAr4g7.jpg:small
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CcsuxhsWEAE3pky.jpg:small
236 ms
CcsuA6eXEAA7h2E.jpg:small
241 ms
PTSansWeb.css
819 ms
jwplayer.js
685 ms
jwpsrv.js
474 ms
jot
26 ms
sharing.js
143 ms
related.js
148 ms
provider.cast.js
148 ms
96 ms
PTS55F_W.woff
568 ms
PTS75F_W.woff
893 ms
empty.gif
91 ms
cast_sender.js
23 ms
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1 ms
ert.cern.ch accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
ert.cern.ch best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
ert.cern.ch SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Page is blocked from indexing
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ert.cern.ch can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Ert.cern.ch main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
ert.cern.ch
Open Graph description is not detected on the main page of Ert CERN. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: