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

Report Summary

  • 23

    Performance

    Renders faster than
    41% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

biologicalsciences.leeds.ac.uk

Faculty of Biological Sciences | University of Leeds

Page Load Speed

3.5 sec in total

First Response

596 ms

Resources Loaded

2.4 sec

Page Rendered

457 ms

biologicalsciences.leeds.ac.uk screenshot

About Website

Welcome to biologicalsciences.leeds.ac.uk homepage info - get ready to check Biological Sciences Leeds best content for United Kingdom right away, or after learning these important things about biologicalsciences.leeds.ac.uk

As a student or researcher within the Faculty of Biological Sciences, you will have the opportunity to work with world-renowned academics in first-rate facilities. Discover more about our ground-break...

Visit biologicalsciences.leeds.ac.uk

Key Findings

We analyzed Biologicalsciences.leeds.ac.uk page load time and found that the first response time was 596 ms and then it took 2.9 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

biologicalsciences.leeds.ac.uk performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

45/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

10/100

25%

SI (Speed Index)

Value6.0 s

47/100

10%

TBT (Total Blocking Time)

Value1,080 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value0.687

7/100

15%

TTI (Time to Interactive)

Value10.2 s

26/100

10%

Network Requests Diagram

biologicalsciences.leeds.ac.uk

596 ms

gtm.js

79 ms

yos6uow.css

48 ms

modernizr-custom.js

403 ms

bootstrap.min.css

410 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 36% of them (17 requests) were addressed to the original Biologicalsciences.leeds.ac.uk, 28% (13 requests) were made to Production2.leeds.ac.uk and 19% (9 requests) were made to Use.typekit.net. The less responsive or slowest element that took the longest time to load (806 ms) belongs to the original domain Biologicalsciences.leeds.ac.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 105.0 kB (8%)

Content Size

1.4 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Biologicalsciences.leeds.ac.uk main page is 1.4 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. 50% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 67.0 kB

  • Original 78.1 kB
  • After minification 52.3 kB
  • After compression 11.2 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 25.8 kB, which is 33% 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 67.0 kB or 86% of the original size.

Image Optimization

-4%

Potential reduce by 37.7 kB

  • Original 1.0 MB
  • After minification 1.0 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. Biological Sciences Leeds images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 40 B

  • Original 157.9 kB
  • After minification 157.9 kB
  • After compression 157.9 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

-0%

Potential reduce by 291 B

  • Original 70.2 kB
  • After minification 70.2 kB
  • After compression 69.9 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. Biologicalsciences.leeds.ac.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 11 (31%)

Requests Now

35

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Biological Sciences 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 7 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

biologicalsciences.leeds.ac.uk

biologicalsciences.leeds.ac.uk

596 ms

gtm.js

gtm.js

79 ms

yos6uow.css

yos6uow.css

48 ms

modernizr-custom.js

modernizr-custom.js

403 ms

bootstrap.min.css

bootstrap.min.css

410 ms

toolkit.min.css

toolkit.min.css

421 ms

cookies.min.css

cookies.min.css

415 ms

instafeed.min.js

instafeed.min.js

45 ms

jquery-3.6.0.min.js

jquery-3.6.0.min.js

31 ms

script.min.js

script.min.js

562 ms

dev.min.js

dev.min.js

413 ms

cookies.min.js

cookies.min.js

560 ms

p.css

p.css

17 ms

1400x933-0-0-1-85-Open_Days_Web_Banner_Image_June_2022.jpg

1400x933-0-0-1-85-Open_Days_Web_Banner_Image_June_2022.jpg

166 ms

uol-logo.png

uol-logo.png

158 ms

uol-logo-mark.png

uol-logo-mark.png

157 ms

800x400-0-0-1-85-OfferHolderPG__2__3.png

800x400-0-0-1-85-OfferHolderPG__2__3.png

562 ms

600x300-0-0-1-80-Nov__3_.png

600x300-0-0-1-80-Nov__3_.png

664 ms

600x300-0-0-1-80-Nov__4_.png

600x300-0-0-1-80-Nov__4_.png

719 ms

600x300-0-0-1-80-Nov__5_.png

600x300-0-0-1-80-Nov__5_.png

796 ms

400x400-0-0-1-80-ProfessorKarenBirch_0025.jpg

400x400-0-0-1-80-ProfessorKarenBirch_0025.jpg

665 ms

400x200-0-0-1-80-Dr_Martina_Foglizzo_permissions_Dr_Foglizzo.png

400x200-0-0-1-80-Dr_Martina_Foglizzo_permissions_Dr_Foglizzo.png

665 ms

400x200-0-0-1-80-Dr_Niluka_Goonawardane_permissions_Dr_Goonawardane.png

400x200-0-0-1-80-Dr_Niluka_Goonawardane_permissions_Dr_Goonawardane.png

665 ms

400x200-0-0-1-80-NAPIC_co_directors_group_shot.png

400x200-0-0-1-80-NAPIC_co_directors_group_shot.png

724 ms

400x200-0-0-1-80-A_woman_presents_behind_a_podium_permissions_Hannah_Jackson_LIDA.jpg

400x200-0-0-1-80-A_woman_presents_behind_a_podium_permissions_Hannah_Jackson_LIDA.jpg

725 ms

400x200-0-0-1-80-Untitled_design_26.png

400x200-0-0-1-80-Untitled_design_26.png

726 ms

400x200-0-0-1-80-Research_Discovery_Day_permissions_Joan_Boyes.png

400x200-0-0-1-80-Research_Discovery_Day_permissions_Joan_Boyes.png

727 ms

400x200-0-0-1-80-Black_in_Plant_Science_Conference.jpg

400x200-0-0-1-80-Black_in_Plant_Science_Conference.jpg

806 ms

800x400-0-0-1-80-Nov__8_.png

800x400-0-0-1-80-Nov__8_.png

770 ms

800x400-0-0-1-80-Nov__1_.png

800x400-0-0-1-80-Nov__1_.png

770 ms

109x60-0-0-1-80-Athena_SWAN_Logo_Silver.jpg

109x60-0-0-1-80-Athena_SWAN_Logo_Silver.jpg

795 ms

d

d

402 ms

d

d

603 ms

tk-icons.woff

tk-icons.woff

402 ms

d

d

638 ms

d

d

414 ms

d

d

470 ms

d

d

470 ms

d

d

414 ms

d

d

469 ms

recent

recent

506 ms

recent

recent

630 ms

ns.html

ns.html

241 ms

uol-logo.svg

uol-logo.svg

255 ms

uol-logo-mark.svg

uol-logo-mark.svg

254 ms

print.min.css

print.min.css

86 ms

123 ms

Accessibility Review

biologicalsciences.leeds.ac.uk accessibility score

98

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.

Best Practices

biologicalsciences.leeds.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

biologicalsciences.leeds.ac.uk SEO score

88

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 Biologicalsciences.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 Biologicalsciences.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

biologicalsciences.leeds.ac.uk

Open Graph description is not detected on the main page of Biological Sciences Leeds. 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: