Tools & Wizards About Us
sustainability.leeds.ac.uk screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

sustainability.leeds.ac.uk

The Sustainability Service at the University of Leeds

Page Load Speed

2.6 sec in total

First Response

286 ms

Resources Loaded

1.6 sec

Page Rendered

766 ms

sustainability.leeds.ac.uk screenshot

About Website

Visit sustainability.leeds.ac.uk now to see the best up-to-date Sustainability Leeds content for United Kingdom and also check out these interesting facts you probably never knew about sustainability.leeds.ac.uk

At the University of Leeds Sustainability is embedded in everything we do and we are taking the lead on global grand challenges

Visit sustainability.leeds.ac.uk

Key Findings

We analyzed Sustainability.leeds.ac.uk page load time and found that the first response time was 286 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

sustainability.leeds.ac.uk performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

56/100

10%

LCP (Largest Contentful Paint)

Value18.1 s

0/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value1,450 ms

15/100

30%

CLS (Cumulative Layout Shift)

Value0.913

3/100

15%

TTI (Time to Interactive)

Value13.8 s

10/100

10%

Network Requests Diagram

sustainability.leeds.ac.uk

286 ms

sustainability.leeds.ac.uk

361 ms

vlw5ilb.css

87 ms

style.css

30 ms

style.min.css

51 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 76% of them (34 requests) were addressed to the original Sustainability.leeds.ac.uk, 16% (7 requests) were made to Use.typekit.net and 2% (1 request) were made to P.typekit.net. The less responsive or slowest element that took the longest time to load (482 ms) relates to the external source Googletagmanager.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 54.9 kB (1%)

Content Size

4.3 MB

After Optimization

4.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sustainability.leeds.ac.uk main page is 4.3 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. 65% of websites need less resources to load. Images take 3.8 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 52.9 kB

  • Original 66.6 kB
  • After minification 62.4 kB
  • After compression 13.6 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 52.9 kB or 80% of the original size.

Image Optimization

-0%

Potential reduce by 98 B

  • Original 3.8 MB
  • After minification 3.8 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. Sustainability Leeds images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 750 B

  • Original 288.6 kB
  • After minification 288.1 kB
  • After compression 287.9 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

-2%

Potential reduce by 1.2 kB

  • Original 62.9 kB
  • After minification 62.9 kB
  • After compression 61.8 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. Sustainability.leeds.ac.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 21 (62%)

Requests Now

34

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sustainability Leeds. 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.

Network Requests Diagram

sustainability.leeds.ac.uk

sustainability.leeds.ac.uk

286 ms

sustainability.leeds.ac.uk

sustainability.leeds.ac.uk

361 ms

vlw5ilb.css

vlw5ilb.css

87 ms

style.css

style.css

30 ms

style.min.css

style.min.css

51 ms

toolkit-shortcodes.css

toolkit-shortcodes.css

48 ms

toolkit-profiles.css

toolkit-profiles.css

47 ms

frontend.css

frontend.css

54 ms

style.css

style.css

47 ms

default.css

default.css

57 ms

jquery.min.js

jquery.min.js

58 ms

jquery-migrate.min.js

jquery-migrate.min.js

56 ms

frontend.js

frontend.js

57 ms

modernizr-custom.js

modernizr-custom.js

79 ms

toolkit-shortcodes.js

toolkit-shortcodes.js

57 ms

hooks.min.js

hooks.min.js

57 ms

i18n.min.js

i18n.min.js

64 ms

index.js

index.js

66 ms

index.js

index.js

72 ms

toolkit-wordpress.js

toolkit-wordpress.js

73 ms

bundle.js

bundle.js

156 ms

p.css

p.css

34 ms

hotjar-806737.js

hotjar-806737.js

423 ms

gtm.js

gtm.js

482 ms

uol-logo.png

uol-logo.png

357 ms

Untitled-1-1400x700.png

Untitled-1-1400x700.png

408 ms

20230329_085456076_iOS-1.jpg

20230329_085456076_iOS-1.jpg

358 ms

Barter-bank-bin-it-smaller.jpg

Barter-bank-bin-it-smaller.jpg

357 ms

SDGWheel_Transparent_188x188.png

SDGWheel_Transparent_188x188.png

355 ms

Newsletter-Headers-43.jpeg

Newsletter-Headers-43.jpeg

375 ms

Website-header-image-800x400-4-fairtrade-1.jpeg

Website-header-image-800x400-4-fairtrade-1.jpeg

404 ms

web-1.jpg

web-1.jpg

378 ms

Web-banner-size-11.jpeg

Web-banner-size-11.jpeg

404 ms

Website-header-image-800x400-1.jpeg

Website-header-image-800x400-1.jpeg

402 ms

image-18.jpg

image-18.jpg

411 ms

d

d

131 ms

d

d

192 ms

ds-icons.woff

ds-icons.woff

129 ms

ds-icons.woff

ds-icons.woff

300 ms

d

d

192 ms

d

d

190 ms

d

d

122 ms

d

d

97 ms

modules.8da33a8f469c3b5ffcec.js

modules.8da33a8f469c3b5ffcec.js

43 ms

ds-icons.ttf

ds-icons.ttf

149 ms

Accessibility Review

sustainability.leeds.ac.uk accessibility score

100

Accessibility Issues

Best Practices

sustainability.leeds.ac.uk best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

sustainability.leeds.ac.uk SEO score

98

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

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 Sustainability.leeds.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 Sustainability.leeds.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

sustainability.leeds.ac.uk

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