Tools & Wizards About Us

Report Summary

  • 56

    Performance

    Renders faster than
    72% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

cortexlab.net

Cortexlab | Cortexlab - UCL – University College London

Page Load Speed

4.1 sec in total

First Response

38 ms

Resources Loaded

3.8 sec

Page Rendered

205 ms

About Website

Welcome to cortexlab.net homepage info - get ready to check Cortexlab best content right away, or after learning these important things about cortexlab.net

We aim to understand how the brain processes sensory signals, and integrates them with internal signals to guide decision and action. We wish to understand these processes at the level of large popula...

Visit cortexlab.net

Key Findings

We analyzed Cortexlab.net page load time and found that the first response time was 38 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

cortexlab.net performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

33/100

10%

LCP (Largest Contentful Paint)

Value8.1 s

2/100

25%

SI (Speed Index)

Value5.6 s

53/100

10%

TBT (Total Blocking Time)

Value200 ms

90/100

30%

CLS (Cumulative Layout Shift)

Value0.067

97/100

15%

TTI (Time to Interactive)

Value6.9 s

54/100

10%

Network Requests Diagram

cortexlab.net

38 ms

cortexlab

646 ms

font-awesome.min.css

122 ms

screen.min.css

132 ms

skyblue.min.css

149 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Cortexlab.net, 49% (34 requests) were made to Cdn.ucl.ac.uk and 39% (27 requests) were made to Ucl.ac.uk. The less responsive or slowest element that took the longest time to load (2.3 sec) relates to the external source Ucl.ac.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 87.4 kB (18%)

Content Size

480.4 kB

After Optimization

393.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cortexlab.net main page is 480.4 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. 25% of websites need less resources to load. Images take 235.4 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 45.2 kB

  • Original 56.9 kB
  • After minification 55.9 kB
  • After compression 11.7 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 45.2 kB or 79% of the original size.

Image Optimization

-2%

Potential reduce by 4.1 kB

  • Original 235.4 kB
  • After minification 231.3 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. Cortexlab images are well optimized though.

JavaScript Optimization

-24%

Potential reduce by 38.0 kB

  • Original 157.1 kB
  • After minification 157.0 kB
  • After compression 119.1 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 38.0 kB or 24% of the original size.

CSS Optimization

-0%

Potential reduce by 90 B

  • Original 31.1 kB
  • After minification 31.1 kB
  • After compression 31.0 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. Cortexlab.net has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 56 (85%)

Requests Now

66

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 66 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cortexlab. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 32 to 1 for JavaScripts and from 19 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

cortexlab.net accessibility score

100

Accessibility Issues

Best Practices

cortexlab.net 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

SEO Factors

cortexlab.net SEO score

91

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 Cortexlab.net 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 Cortexlab.net 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

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