Tools & Wizards About Us
lhcathome.cern.ch screenshot

Report Summary

  • 67

    Performance

    Renders faster than
    80% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

lhcathome.cern.ch

LHC@home

Page Load Speed

3.8 sec in total

First Response

452 ms

Resources Loaded

3 sec

Page Rendered

345 ms

lhcathome.cern.ch screenshot

About Website

Visit lhcathome.cern.ch now to see the best up-to-date LHC At Home Cern content for United States and also check out these interesting facts you probably never knew about lhcathome.cern.ch

Visit lhcathome.cern.ch

Key Findings

We analyzed Lhcathome.cern.ch page load time and found that the first response time was 452 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

lhcathome.cern.ch performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

49/100

10%

LCP (Largest Contentful Paint)

Value7.2 s

5/100

25%

SI (Speed Index)

Value4.7 s

69/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.4 s

93/100

10%

Network Requests Diagram

lhcathome.cern.ch

452 ms

lhcathome

183 ms

lhcathome.web.cern.ch

1173 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

184 ms

css_Lldvj8x70fSdFznlLdz6n43S3GRjHT0LIBr1FLUen2Y.css

182 ms

Our browser made a total of 35 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Lhcathome.cern.ch, 91% (32 requests) were made to Lhcathome.web.cern.ch and 3% (1 request) were made to Cern.ch. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Lhcathome.web.cern.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 253.8 kB (26%)

Content Size

992.5 kB

After Optimization

738.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Lhcathome.cern.ch main page is 992.5 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 702.4 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 28.0 kB

  • Original 35.9 kB
  • After minification 30.3 kB
  • After compression 7.9 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. This page needs HTML code to be minified as it can gain 5.6 kB, which is 16% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 28.0 kB or 78% of the original size.

Image Optimization

-5%

Potential reduce by 38.1 kB

  • Original 702.4 kB
  • After minification 664.3 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. LHC At Home Cern images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 136.0 kB

  • Original 188.6 kB
  • After minification 155.0 kB
  • After compression 52.6 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 136.0 kB or 72% of the original size.

CSS Optimization

-79%

Potential reduce by 51.7 kB

  • Original 65.6 kB
  • After minification 63.6 kB
  • After compression 13.9 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. Lhcathome.cern.ch needs all CSS files to be minified and compressed as it can save up to 51.7 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (28%)

Requests Now

32

After Optimization

23

  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of LHC At Home 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 4 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

lhcathome.cern.ch

lhcathome.cern.ch

452 ms

lhcathome

lhcathome

183 ms

lhcathome.web.cern.ch

lhcathome.web.cern.ch

1173 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

184 ms

css_Lldvj8x70fSdFznlLdz6n43S3GRjHT0LIBr1FLUen2Y.css

css_Lldvj8x70fSdFznlLdz6n43S3GRjHT0LIBr1FLUen2Y.css

182 ms

css_ysIhHCdRbjLyHCpU-veAujZf3hNK8o1g4LClz9qwvzE.css

css_ysIhHCdRbjLyHCpU-veAujZf3hNK8o1g4LClz9qwvzE.css

184 ms

css_TGJb4peQX-zPXkYpaPJ84mCM5BpWmXDDxHM6QS3jZis.css

css_TGJb4peQX-zPXkYpaPJ84mCM5BpWmXDDxHM6QS3jZis.css

184 ms

css_dw-yv_Rc3Xfy8KdWGEuKgOCtbRMJJ5oEjnJMf4Mnla4.css

css_dw-yv_Rc3Xfy8KdWGEuKgOCtbRMJJ5oEjnJMf4Mnla4.css

185 ms

js_UWQINlriydSoeSiGQxToOUdv493zEa7dpsXC1OtYlZU.js

js_UWQINlriydSoeSiGQxToOUdv493zEa7dpsXC1OtYlZU.js

347 ms

js_VaieF6Vd0GiVPeU6bh0_VzknpLTfb_zq5k9ox0OI3Pg.js

js_VaieF6Vd0GiVPeU6bh0_VzknpLTfb_zq5k9ox0OI3Pg.js

270 ms

js_conAsWFhRKk_cpGQHS6r7bij9jYhuxJKU8cXLMuDauQ.js

js_conAsWFhRKk_cpGQHS6r7bij9jYhuxJKU8cXLMuDauQ.js

372 ms

js_8mR9soLphCsRiE7iB6wmEcljj0Uklgc9W0Q3fsrgoWY.js

js_8mR9soLphCsRiE7iB6wmEcljj0Uklgc9W0Q3fsrgoWY.js

106 ms

general.png

general.png

847 ms

lhc-logo-300_lightblue.png

lhc-logo-300_lightblue.png

96 ms

menu-leaf.png

menu-leaf.png

94 ms

menu-expanded.png

menu-expanded.png

92 ms

menu-expanded.png

menu-expanded.png

97 ms

slide-3.jpg

slide-3.jpg

269 ms

slide-4.jpg

slide-4.jpg

182 ms

slide-8.jpg

slide-8.jpg

268 ms

slide-2.jpg

slide-2.jpg

268 ms

cms_1.jpg

cms_1.jpg

445 ms

slide-7.jpg

slide-7.jpg

271 ms

atlasathome-bwx.png

atlasathome-bwx.png

271 ms

zap.jpg

zap.jpg

359 ms

CMSlogo.png

CMSlogo.png

359 ms

trax_0.jpg

trax_0.jpg

361 ms

smash.jpg

smash.jpg

362 ms

BOINC-logo.png

BOINC-logo.png

450 ms

LogoOutline-White.gif

LogoOutline-White.gif

448 ms

css_KewDO5wEEsc7lN4pHuveACu0xsD2jrJhTUcVZmmWkVs.css

css_KewDO5wEEsc7lN4pHuveACu0xsD2jrJhTUcVZmmWkVs.css

92 ms

css_Ody3Rnnxl1jUn-gSkZfNONZA3PvWask0tHZzQnHYUIU.css

css_Ody3Rnnxl1jUn-gSkZfNONZA3PvWask0tHZzQnHYUIU.css

92 ms

pattern.png

pattern.png

92 ms

inactive-slide.png

inactive-slide.png

92 ms

active-slide.png

active-slide.png

93 ms

Accessibility Review

lhcathome.cern.ch accessibility score

78

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Buttons do not have an accessible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Best Practices

lhcathome.cern.ch best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

lhcathome.cern.ch SEO score

92

Search Engine Optimization Advices

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lhcathome.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 Lhcathome.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.

Social Sharing Optimization

lhcathome.cern.ch

Open Graph description is not detected on the main page of LHC At Home 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: