Tools & Wizards About Us
blockchain.cs.ucl.ac.uk screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

blockchain.cs.ucl.ac.uk

UCL Blockchain | Advancing blockchain technology through research, education, and advocacy

Page Load Speed

6.9 sec in total

First Response

1.2 sec

Resources Loaded

4.9 sec

Page Rendered

788 ms

blockchain.cs.ucl.ac.uk screenshot

About Website

Welcome to blockchain.cs.ucl.ac.uk homepage info - get ready to check Blockchain Cs UCL best content for United Kingdom right away, or after learning these important things about blockchain.cs.ucl.ac.uk

The UCL CBT provides a cross-sectoral platform, which drives the adoption and integration of Blockchain and DLT into our socio-economic systems.

Visit blockchain.cs.ucl.ac.uk

Key Findings

We analyzed Blockchain.cs.ucl.ac.uk page load time and found that the first response time was 1.2 sec and then it took 5.7 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

blockchain.cs.ucl.ac.uk performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.4 s

2/100

10%

LCP (Largest Contentful Paint)

Value14.6 s

0/100

25%

SI (Speed Index)

Value10.5 s

8/100

10%

TBT (Total Blocking Time)

Value860 ms

33/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value15.0 s

8/100

10%

Network Requests Diagram

blockchain.cs.ucl.ac.uk

1231 ms

analytics.js

31 ms

wp-emoji-release.min.js

155 ms

style.min.css

156 ms

style.min.css

234 ms

Our browser made a total of 173 requests to load all elements on the main page. We found that 87% of them (151 requests) were addressed to the original Blockchain.cs.ucl.ac.uk, 4% (7 requests) were made to Youtube.com and 1% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Blockchain.cs.ucl.ac.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 878.0 kB (13%)

Content Size

6.8 MB

After Optimization

6.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Blockchain.cs.ucl.ac.uk main page is 6.8 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. Only a small number of websites need less resources to load. Images take 5.2 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 273.5 kB

  • Original 315.2 kB
  • After minification 309.0 kB
  • After compression 41.7 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 273.5 kB or 87% of the original size.

Image Optimization

-6%

Potential reduce by 300.6 kB

  • Original 5.2 MB
  • After minification 4.9 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. Blockchain Cs UCL images are well optimized though.

JavaScript Optimization

-30%

Potential reduce by 277.6 kB

  • Original 924.2 kB
  • After minification 924.1 kB
  • After compression 646.5 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 277.6 kB or 30% of the original size.

CSS Optimization

-6%

Potential reduce by 26.2 kB

  • Original 436.0 kB
  • After minification 435.9 kB
  • After compression 409.8 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. Blockchain.cs.ucl.ac.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 130 (81%)

Requests Now

160

After Optimization

30

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 160 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blockchain Cs UCL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 77 to 1 for JavaScripts and from 55 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

blockchain.cs.ucl.ac.uk

blockchain.cs.ucl.ac.uk

1231 ms

analytics.js

analytics.js

31 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

155 ms

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156 ms

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656 ms

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link-buttons.min.css

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613 ms

animate.min.css

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616 ms

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554 ms

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533 ms

slick-carousal.css

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495 ms

jquery.js

jquery.js

604 ms

jquery-migrate.min.js

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518 ms

frontend.min.js

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515 ms

core.min.js

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508 ms

script.js

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476 ms

side-menu.js

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478 ms

jq-sticky-anything.min.js

jq-sticky-anything.min.js

543 ms

wordpress_file_upload_functions.js

wordpress_file_upload_functions.js

582 ms

datepicker.min.js

datepicker.min.js

470 ms

jquery-ui-timepicker-addon.min.js

jquery-ui-timepicker-addon.min.js

478 ms

modernizr.js

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478 ms

um-gdpr.min.js

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495 ms

detectmobilebrowser.js

detectmobilebrowser.js

500 ms

mystickymenu.min.js

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497 ms

stickThis.js

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671 ms

widget.min.js

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mouse.min.js

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718 ms

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705 ms

magnific.js

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677 ms

touchswipe.min.js

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caroufredsel.min.js

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superfish.js

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680 ms

init.js

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922 ms

new-tab.js

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627 ms

validate.js

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624 ms

script.min.js

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603 ms

select2.min.js

select2.min.js

603 ms

underscore.min.js

underscore.min.js

669 ms

wp-util.min.js

wp-util.min.js

669 ms

um-crop.min.js

um-crop.min.js

630 ms

um-modal.min.js

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618 ms

um-jquery-form.min.js

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598 ms

um-fileupload.min.js

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662 ms

picker.js

picker.js

670 ms

picker.date.js

picker.date.js

669 ms

picker.time.js

picker.time.js

624 ms

legacy.js

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613 ms

wp-polyfill.min.js

wp-polyfill.min.js

679 ms

i18n.min.js

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671 ms

um-raty.min.js

um-raty.min.js

669 ms

um-tipsy.min.js

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612 ms

imagesloaded.min.js

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615 ms

masonry.min.js

masonry.min.js

676 ms

jquery.masonry.min.js

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667 ms

simplebar.min.js

simplebar.min.js

670 ms

um-functions.min.js

um-functions.min.js

625 ms

um-responsive.min.js

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623 ms

um-conditional.min.js

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632 ms

hotjar-1630537.js

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233 ms

um-scripts.min.js

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474 ms

dropdown.min.js

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475 ms

hooks.min.js

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432 ms

um-members.min.js

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443 ms

um-profile.min.js

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451 ms

um-account.min.js

um-account.min.js

460 ms

wp-embed.min.js

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500 ms

js_composer_front.min.js

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503 ms

mediaelement-and-player.min.js

mediaelement-and-player.min.js

503 ms

mediaelement-migrate.min.js

mediaelement-migrate.min.js

491 ms

wp-mediaelement.min.js

wp-mediaelement.min.js

495 ms

slick.js

slick.js

506 ms

custom-tm.js

custom-tm.js

539 ms

ads.js

ads.js

538 ms

OpenSans-Regular-webfont.woff

OpenSans-Regular-webfont.woff

481 ms

OpenSans-Light-webfont.woff

OpenSans-Light-webfont.woff

496 ms

OpenSans-Semibold-webfont.woff

OpenSans-Semibold-webfont.woff

526 ms

OpenSansBold-webfont.woff

OpenSansBold-webfont.woff

523 ms

fontawesome-webfont.woff

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609 ms

fontawesome-webfont.svg

fontawesome-webfont.svg

700 ms

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555 ms

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643 ms

icomoon.woff

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495 ms

logo-spacer.png

logo-spacer.png

512 ms

comodin2.jpg

comodin2.jpg

512 ms

Desktop.png

Desktop.png

520 ms

Mobile.png

Mobile.png

534 ms

UCL-CBT-Home-a.png

UCL-CBT-Home-a.png

624 ms

blockchain-01-01.jpg

blockchain-01-01.jpg

1037 ms

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541 ms

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538 ms

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572 ms

blochchain3-02.jpg

blochchain3-02.jpg

973 ms

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965 ms

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956 ms

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944 ms

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371 ms

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346 ms

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159 ms

blockchain.cs.ucl.ac.uk

blockchain.cs.ucl.ac.uk

987 ms

x-yLWPI8q3s

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150 ms

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www-player.css

6 ms

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22 ms

base.js

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42 ms

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116 ms

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72 ms

embed.js

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29 ms

AIdro_nIbhc5ExG9zZp9CclK1FJId5I1VkXPaX3OMewBZfKeAg=s68-c-k-c0x00ffffff-no-rj

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229 ms

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24 ms

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29 ms

id

id

22 ms

Create

Create

80 ms

GenerateIT

GenerateIT

14 ms

Accessibility Review

blockchain.cs.ucl.ac.uk accessibility score

74

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

[aria-hidden="true"] elements contain focusable descendents

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

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

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

blockchain.cs.ucl.ac.uk best practices score

67

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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

blockchain.cs.ucl.ac.uk SEO score

82

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

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 Blockchain.cs.ucl.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 Blockchain.cs.ucl.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

blockchain.cs.ucl.ac.uk

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