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liysf.org.uk screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    37% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

liysf.org.uk

STEM Summer Camp In The UK | London International Youth Science Forum CIC

Page Load Speed

2.4 sec in total

First Response

175 ms

Resources Loaded

1.8 sec

Page Rendered

489 ms

liysf.org.uk screenshot

About Website

Click here to check amazing Liysf content. Otherwise, check out these important facts you probably never knew about liysf.org.uk

London International Youth Science Forum CIC (LIYSF CIC) is a STEM summer camp in the UK that offers a two-week STEM Programme held at Imperial College, London covering a wide range of lectures by ren...

Visit liysf.org.uk

Key Findings

We analyzed Liysf.org.uk page load time and found that the first response time was 175 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

liysf.org.uk performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value10.5 s

0/100

25%

SI (Speed Index)

Value12.1 s

3/100

10%

TBT (Total Blocking Time)

Value2,670 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value15.1 s

7/100

10%

Network Requests Diagram

liysf.org.uk

175 ms

www.liysf.org.uk

439 ms

all.min.css

432 ms

jquery.min.js

71 ms

en-gb.js

49 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 65% of them (28 requests) were addressed to the original Liysf.org.uk, 7% (3 requests) were made to S.ytimg.com and 5% (2 requests) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (535 ms) belongs to the original domain Liysf.org.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 704.1 kB (59%)

Content Size

1.2 MB

After Optimization

499.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Liysf.org.uk main page is 1.2 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. 70% of websites need less resources to load. Javascripts take 474.3 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 35.5 kB

  • Original 44.4 kB
  • After minification 34.7 kB
  • After compression 8.9 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 9.7 kB, which is 22% 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 35.5 kB or 80% of the original size.

Image Optimization

-3%

Potential reduce by 7.8 kB

  • Original 265.8 kB
  • After minification 258.0 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. Liysf images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 313.0 kB

  • Original 474.3 kB
  • After minification 388.6 kB
  • After compression 161.3 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 313.0 kB or 66% of the original size.

CSS Optimization

-83%

Potential reduce by 347.8 kB

  • Original 418.9 kB
  • After minification 406.5 kB
  • After compression 71.1 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. Liysf.org.uk needs all CSS files to be minified and compressed as it can save up to 347.8 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (58%)

Requests Now

38

After Optimization

16

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Liysf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

liysf.org.uk

liysf.org.uk

175 ms

www.liysf.org.uk

www.liysf.org.uk

439 ms

all.min.css

all.min.css

432 ms

jquery.min.js

jquery.min.js

71 ms

en-gb.js

en-gb.js

49 ms

plugins.js

plugins.js

95 ms

custom.js

custom.js

185 ms

responsive-tabs.js

responsive-tabs.js

184 ms

bootstrap.js

bootstrap.js

373 ms

masonry.pkgd.js

masonry.pkgd.js

20 ms

lightbox.js

lightbox.js

268 ms

imagesloaded.pkgd.min.js

imagesloaded.pkgd.min.js

184 ms

jquery.lazyload.js

jquery.lazyload.js

304 ms

jquery-ui.min.js

jquery-ui.min.js

24 ms

bootstrap-social.css

bootstrap-social.css

334 ms

font-awesome.css

font-awesome.css

334 ms

no-more-tables.css

no-more-tables.css

402 ms

soon.css

soon.css

401 ms

lightbox.css

lightbox.css

400 ms

imagegen.ashx

imagegen.ashx

103 ms

imagegen.ashx

imagegen.ashx

188 ms

imagegen.ashx

imagegen.ashx

249 ms

imagegen.ashx

imagegen.ashx

191 ms

imagegen.ashx

imagegen.ashx

481 ms

imagegen.ashx

imagegen.ashx

192 ms

gtm.js

gtm.js

98 ms

www.liysf.org.uk

www.liysf.org.uk

447 ms

OFG6s1Ay7L8

OFG6s1Ay7L8

138 ms

close.png

close.png

294 ms

loading.gif

loading.gif

296 ms

prev.png

prev.png

294 ms

next.png

next.png

297 ms

imagegen.ashx

imagegen.ashx

535 ms

www-embed-player-vflfNyN_r.css

www-embed-player-vflfNyN_r.css

70 ms

www-embed-player.js

www-embed-player.js

81 ms

base.js

base.js

149 ms

analytics.js

analytics.js

35 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

326 ms

collect

collect

154 ms

Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js

Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js

46 ms

ad_status.js

ad_status.js

79 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

83 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

92 ms

Accessibility Review

liysf.org.uk accessibility score

74

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

High

Form elements do not have associated labels

High

Links do not have a discernible 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.

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

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

liysf.org.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

High

Missing source maps for large first-party JavaScript

SEO Factors

liysf.org.uk SEO score

92

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

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 Liysf.org.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 Liysf.org.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

liysf.org.uk

Open Graph description is not detected on the main page of Liysf. 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: