Tools & Wizards About Us
celsius.lshtm.ac.uk screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 91% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

celsius.lshtm.ac.uk

CeLSIUS | Institute of Epidemiology & Health Care - UCL – University College London

Page Load Speed

5.9 sec in total

First Response

506 ms

Resources Loaded

4.9 sec

Page Rendered

503 ms

celsius.lshtm.ac.uk screenshot

About Website

Click here to check amazing CeLSIUS Lshtm content for Nigeria. Otherwise, check out these important facts you probably never knew about celsius.lshtm.ac.uk

We enable research using the Office for National Statistics (ONS) Longitudinal Study - the largest nationally representative longitudinal dataset in the UK

Visit celsius.lshtm.ac.uk

Key Findings

We analyzed Celsius.lshtm.ac.uk page load time and found that the first response time was 506 ms and then it took 5.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

celsius.lshtm.ac.uk performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

10/100

10%

LCP (Largest Contentful Paint)

Value5.1 s

25/100

25%

SI (Speed Index)

Value21.1 s

0/100

10%

TBT (Total Blocking Time)

Value20,200 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.091

92/100

15%

TTI (Time to Interactive)

Value35.7 s

0/100

10%

Network Requests Diagram

celsius.lshtm.ac.uk

506 ms

studies-10

708 ms

font-awesome.min.css

441 ms

screen.min.css

430 ms

brightblue.min.css

424 ms

Our browser made a total of 114 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Celsius.lshtm.ac.uk, 32% (37 requests) were made to Ucl.ac.uk and 30% (34 requests) were made to Cdn.ucl.ac.uk. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source Ucl.ac.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 385.6 kB (12%)

Content Size

3.2 MB

After Optimization

2.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Celsius.lshtm.ac.uk main page is 3.2 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 3.0 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 68.8 kB

  • Original 85.7 kB
  • After minification 81.7 kB
  • After compression 16.9 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. 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 68.8 kB or 80% of the original size.

Image Optimization

-11%

Potential reduce by 311.8 kB

  • Original 3.0 MB
  • After minification 2.6 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, CeLSIUS Lshtm needs image optimization as it can save up to 311.8 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 2.6 kB

  • Original 132.7 kB
  • After minification 132.6 kB
  • After compression 130.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-7%

Potential reduce by 2.4 kB

  • Original 33.3 kB
  • After minification 33.3 kB
  • After compression 30.9 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. Celsius.lshtm.ac.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 84 (76%)

Requests Now

111

After Optimization

27

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 111 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CeLSIUS Lshtm. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 53 to 1 for JavaScripts and from 20 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

celsius.lshtm.ac.uk

celsius.lshtm.ac.uk

506 ms

studies-10

studies-10

708 ms

font-awesome.min.css

font-awesome.min.css

441 ms

screen.min.css

screen.min.css

430 ms

brightblue.min.css

brightblue.min.css

424 ms

uclSearch.min.css

uclSearch.min.css

451 ms

system.base.css

system.base.css

259 ms

system.messages.css

system.messages.css

345 ms

field.css

field.css

344 ms

node.css

node.css

343 ms

ucl-culture-feed-panes.css

ucl-culture-feed-panes.css

453 ms

views.css

views.css

360 ms

entity_embed.css

entity_embed.css

642 ms

media_wysiwyg.base.css

media_wysiwyg.base.css

544 ms

ctools.css

ctools.css

546 ms

panels.css

panels.css

553 ms

admin_theme.css

admin_theme.css

634 ms

eu_cookie_compliance.css

eu_cookie_compliance.css

606 ms

field_collection.theme.css

field_collection.theme.css

674 ms

cross.css

cross.css

707 ms

e39e0ed4872d6f618f3ae832e880c679.css

e39e0ed4872d6f618f3ae832e880c679.css

696 ms

google_tag.script.js

google_tag.script.js

758 ms

jquery.min.js

jquery.min.js

477 ms

jquery-extend-3.4.0.js

jquery-extend-3.4.0.js

778 ms

jquery-html-prefilter-3.5.0-backport.js

jquery-html-prefilter-3.5.0-backport.js

795 ms

jquery.once.js

jquery.once.js

834 ms

drupal.js

drupal.js

837 ms

modernizr-custom.js

modernizr-custom.js

435 ms

cuttingTheMustard.js

cuttingTheMustard.js

450 ms

jquery.cookie.js

jquery.cookie.js

1091 ms

require.min.js

require.min.js

449 ms

eu_cookie_compliance_hooks.js

eu_cookie_compliance_hooks.js

1082 ms

embed.js

embed.js

1106 ms

main.js

main.js

434 ms

platform.js

platform.js

215 ms

media_wysiwyg.filter.js

media_wysiwyg.filter.js

1123 ms

eu_cookie_compliance.js

eu_cookie_compliance.js

1182 ms

print.min.css

print.min.css

25 ms

widgets.js

widgets.js

469 ms

sdk.js

sdk.js

425 ms

close.png

close.png

376 ms

ucl-logo.svg

ucl-logo.svg

343 ms

blank.gif

blank.gif

342 ms

35x35xtwitter.png.pagespeed.ic.McFsYiTPX-.png

35x35xtwitter.png.pagespeed.ic.McFsYiTPX-.png

341 ms

35x35xfacebook.png.pagespeed.ic.-VUStBF1gm.png

35x35xfacebook.png.pagespeed.ic.-VUStBF1gm.png

347 ms

35x35xyoutube-icon-square.png.pagespeed.ic.GcRcZjQawu.png

35x35xyoutube-icon-square.png.pagespeed.ic.GcRcZjQawu.png

341 ms

35x35xsoundcloud.png.pagespeed.ic.BdtBaqtDmd.jpg

35x35xsoundcloud.png.pagespeed.ic.BdtBaqtDmd.jpg

348 ms

35x35xflickr.png.pagespeed.ic.KdAnMQjbrP.png

35x35xflickr.png.pagespeed.ic.KdAnMQjbrP.png

379 ms

35x35xinstagram-badge.png.pagespeed.ic.OPAzj9OMyV.png

35x35xinstagram-badge.png.pagespeed.ic.OPAzj9OMyV.png

379 ms

35x35xantenna.png.pagespeed.ic.1-fHvaktyk.png

35x35xantenna.png.pagespeed.ic.1-fHvaktyk.png

379 ms

about_the_ons_celsius_new.jpg

about_the_ons_celsius_new.jpg

519 ms

using_the_ons_celsius_new.jpg

using_the_ons_celsius_new.jpg

885 ms

data_dictionary_celsius_new.jpg

data_dictionary_celsius_new.jpg

724 ms

resources_celsius_new.jpg

resources_celsius_new.jpg

883 ms

research_celsius_new.jpg

research_celsius_new.jpg

885 ms

about_celsius_new.jpg

about_celsius_new.jpg

884 ms

pablo-12_1.png

pablo-12_1.png

1431 ms

pablo-11.png

pablo-11.png

1194 ms

pablo-14.png

pablo-14.png

1717 ms

celsius_logo_wide_format.jpeg

celsius_logo_wide_format.jpeg

1319 ms

edit.gif

edit.gif

236 ms

banner-head-image_0.jpeg

banner-head-image_0.jpeg

1498 ms

general.js

general.js

227 ms

tabs.js

tabs.js

226 ms

searchWithAutoComplete.js

searchWithAutoComplete.js

225 ms

carousel.js

carousel.js

224 ms

map.js

map.js

225 ms

lightbox.js

lightbox.js

244 ms

og.js

og.js

245 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

62 ms

sdk.js

sdk.js

78 ms

jquery-no-conflict.js

jquery-no-conflict.js

74 ms

jquery-2.1.1.min.js

jquery-2.1.1.min.js

124 ms

gtm.js

gtm.js

107 ms

gtm.js

gtm.js

236 ms

widget_iframe.7dae38096d06923d683a2a807172322a.html

widget_iframe.7dae38096d06923d683a2a807172322a.html

142 ms

all-site-no-ga.min.js

all-site-no-ga.min.js

12 ms

owl.carousel.min.js

owl.carousel.min.js

28 ms

mob-nav.png

mob-nav.png

136 ms

settings

settings

166 ms

gecko_cookie.js

gecko_cookie.js

98 ms

fbevents.js

fbevents.js

95 ms

analytics.js

analytics.js

201 ms

conversion_async.js

conversion_async.js

201 ms

insight.min.js

insight.min.js

275 ms

uwt.js

uwt.js

185 ms

scevent.min.js

scevent.min.js

179 ms

siteanalyze_51623617.js

siteanalyze_51623617.js

179 ms

1076541309856128

1076541309856128

20 ms

horizon_timeline.a7991bb824d62c8d5038ddd875db8389.js

horizon_timeline.a7991bb824d62c8d5038ddd875db8389.js

66 ms

embeds

embeds

63 ms

571252266361666

571252266361666

87 ms

adsct

adsct

148 ms

adsct

adsct

147 ms

linkid.js

linkid.js

52 ms

collect

collect

89 ms

77 ms

collect

collect

73 ms

collect

collect

42 ms

collect

collect

14 ms

celsiusnews

celsiusnews

411 ms

image.aspx

image.aspx

63 ms

collect

collect

66 ms

59 ms

ga-audiences

ga-audiences

29 ms

polyfills-57d3feabe8bfd4ee389c.js

polyfills-57d3feabe8bfd4ee389c.js

24 ms

runtime-eb61dff4a84b8f906e6b.js

runtime-eb61dff4a84b8f906e6b.js

48 ms

modules.c7def0268c66f6a548ed.js

modules.c7def0268c66f6a548ed.js

93 ms

main-e9db78f5e7b3d83edd5e.js

main-e9db78f5e7b3d83edd5e.js

88 ms

_app-446fb4a338b215deec8c.js

_app-446fb4a338b215deec8c.js

94 ms

%5BscreenName%5D-c8b4c96951cf24f547b4.js

%5BscreenName%5D-c8b4c96951cf24f547b4.js

103 ms

_buildManifest.js

_buildManifest.js

107 ms

_ssgManifest.js

_ssgManifest.js

108 ms

18 ms

Accessibility Review

celsius.lshtm.ac.uk accessibility score

97

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

celsius.lshtm.ac.uk 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

celsius.lshtm.ac.uk SEO score

91

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

High

Tap targets are not sized appropriately

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 Celsius.lshtm.ac.uk 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 Celsius.lshtm.ac.uk 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

celsius.lshtm.ac.uk

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