Report Summary

  • 95

    Performance

    Renders faster than
    94% 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

  • 75

    SEO

    Google-friendlier than
    32% of websites

calresco.org

The Complexity and Artificial Life Research Concept for Self-Organizing Systems

Page Load Speed

1.1 sec in total

First Response

158 ms

Resources Loaded

591 ms

Page Rendered

370 ms

calresco.org screenshot

About Website

Click here to check amazing Calresco content for United States. Otherwise, check out these important facts you probably never knew about calresco.org

Introduction to complex systems and self-organisation covering the fields attractors, artificial life, cellular automata, fractals, genetic algorithms, neural networks and including tutorials, papers ...

Visit calresco.org

Key Findings

We analyzed Calresco.org page load time and found that the first response time was 158 ms and then it took 961 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

calresco.org performance score

95

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.5 s

95/100

10%

LCP (Largest Contentful Paint)

Value2.0 s

97/100

25%

SI (Speed Index)

Value1.6 s

100/100

10%

TBT (Total Blocking Time)

Value220 ms

87/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.2 s

99/100

10%

Network Requests Diagram

calresco.org

158 ms

whatsnew.gif

66 ms

help.gif

128 ms

concept.gif

127 ms

info.gif

127 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that all of those requests were addressed to Calresco.org and no external sources were called. The less responsive or slowest element that took the longest time to load (399 ms) belongs to the original domain Calresco.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 10.6 kB (29%)

Content Size

36.2 kB

After Optimization

25.5 kB

In fact, the total size of Calresco.org main page is 36.2 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. Only 10% of websites need less resources to load. Images take 21.0 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 10.6 kB

  • Original 15.1 kB
  • After minification 14.6 kB
  • After compression 4.5 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 10.6 kB or 70% of the original size.

Image Optimization

-0%

Potential reduce by 8 B

  • Original 21.0 kB
  • After minification 21.0 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. Calresco images are well optimized though.

Requests Breakdown

Number of requests can be reduced by 23 (77%)

Requests Now

30

After Optimization

7

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Calresco. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

calresco.org accessibility score

74

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Links do not have a discernible name

Best Practices

calresco.org best practices score

75

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

SEO Factors

calresco.org SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8-BOM

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Calresco.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Calresco.org main page’s claimed encoding is utf-8-bom. 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

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