Tools & Wizards About Us
carroll-lab.org.uk screenshot

Report Summary

  • 71

    Performance

    Renders faster than
    81% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

carroll-lab.org.uk

Carroll Lab Cambridge | Cambridge Research Institute | Cancer Research UK

Page Load Speed

1.5 sec in total

First Response

194 ms

Resources Loaded

1.2 sec

Page Rendered

124 ms

carroll-lab.org.uk screenshot

About Website

Visit carroll-lab.org.uk now to see the best up-to-date Carroll Lab content and also check out these interesting facts you probably never knew about carroll-lab.org.uk

The Carroll lab is interested in understanding how Estrogen Receptor (ER) causes gene transcription and how this contributes to breast cancer progression.

Visit carroll-lab.org.uk

Key Findings

We analyzed Carroll-lab.org.uk page load time and found that the first response time was 194 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

carroll-lab.org.uk performance score

71

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value5.5 s

19/100

25%

SI (Speed Index)

Value3.5 s

88/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.8 s

89/100

10%

Network Requests Diagram

carroll-lab.org.uk

194 ms

www.carroll-lab.org.uk

239 ms

screen.css

88 ms

jsapi

16 ms

jquery.js

259 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 86% of them (24 requests) were addressed to the original Carroll-lab.org.uk, 7% (2 requests) were made to Google-analytics.com and 4% (1 request) were made to Google.com. The less responsive or slowest element that took the longest time to load (334 ms) belongs to the original domain Carroll-lab.org.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 49.3 kB (9%)

Content Size

556.8 kB

After Optimization

507.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Carroll-lab.org.uk main page is 556.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 416.2 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 10.2 kB

  • Original 13.5 kB
  • After minification 10.8 kB
  • After compression 3.3 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 2.7 kB, which is 20% 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 10.2 kB or 75% of the original size.

Image Optimization

-4%

Potential reduce by 14.7 kB

  • Original 416.2 kB
  • After minification 401.6 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. Carroll Lab images are well optimized though.

JavaScript Optimization

-19%

Potential reduce by 23.3 kB

  • Original 123.2 kB
  • After minification 123.1 kB
  • After compression 99.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 23.3 kB or 19% of the original size.

CSS Optimization

-30%

Potential reduce by 1.2 kB

  • Original 3.9 kB
  • After minification 3.9 kB
  • After compression 2.7 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. Carroll-lab.org.uk needs all CSS files to be minified and compressed as it can save up to 1.2 kB or 30% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (21%)

Requests Now

24

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Carroll Lab. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

carroll-lab.org.uk

carroll-lab.org.uk

194 ms

www.carroll-lab.org.uk

www.carroll-lab.org.uk

239 ms

screen.css

screen.css

88 ms

jsapi

jsapi

16 ms

jquery.js

jquery.js

259 ms

cycle.js

cycle.js

173 ms

slider.js

slider.js

166 ms

jquery-1.7.1.min.js

jquery-1.7.1.min.js

267 ms

divtoggle.js

divtoggle.js

167 ms

loader.js

loader.js

17 ms

ga.js

ga.js

27 ms

search-magnifying-glass.png

search-magnifying-glass.png

86 ms

logo.jpg

logo.jpg

87 ms

carroll-home-background.jpg

carroll-home-background.jpg

86 ms

tile-contact-us.png

tile-contact-us.png

168 ms

tile-research.png

tile-research.png

87 ms

tile-publications.png

tile-publications.png

166 ms

tile-lab-members.png

tile-lab-members.png

170 ms

tile-funding-sources.png

tile-funding-sources.png

251 ms

tile-data.png

tile-data.png

170 ms

tile-photos.png

tile-photos.png

251 ms

tile-links.png

tile-links.png

250 ms

university-of-cambridge.png

university-of-cambridge.png

251 ms

cancer-research-logo.png

cancer-research-logo.png

252 ms

news-heading.png

news-heading.png

253 ms

caroll-logo.png

caroll-logo.png

334 ms

__utm.gif

__utm.gif

11 ms

print.css

print.css

85 ms

Accessibility Review

carroll-lab.org.uk accessibility score

56

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.

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

carroll-lab.org.uk best practices score

58

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

Browser errors were logged to the console

SEO Factors

carroll-lab.org.uk SEO score

67

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

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Carroll-lab.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 Carroll-lab.org.uk main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

carroll-lab.org.uk

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