Tools & Wizards About Us
cadabra.science screenshot

Report Summary

  • 66

    Performance

    Renders faster than
    79% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

cadabra.science

Cadabra: a field-theory motivated approach to computer algebra

Page Load Speed

1.9 sec in total

First Response

215 ms

Resources Loaded

1.5 sec

Page Rendered

183 ms

cadabra.science screenshot

About Website

Visit cadabra.science now to see the best up-to-date Cadabra content for Russia and also check out these interesting facts you probably never knew about cadabra.science

Cadabra is a symbolic computer algebra system designed to solve problems in classical and quantum field theory.

Visit cadabra.science

Key Findings

We analyzed Cadabra.science page load time and found that the first response time was 215 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

cadabra.science performance score

66

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

70/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value4.5 s

72/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.059

98/100

15%

TTI (Time to Interactive)

Value6.8 s

55/100

10%

Network Requests Diagram

cadabra.science

215 ms

cadabra.science

372 ms

MathJax.js

25 ms

css

35 ms

css

69 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 62% of them (24 requests) were addressed to the original Cadabra.science, 15% (6 requests) were made to Google.com and 8% (3 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (721 ms) belongs to the original domain Cadabra.science.

Page Optimization Overview & Recommendations

Page size can be reduced by 109.1 kB (18%)

Content Size

615.8 kB

After Optimization

506.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cadabra.science main page is 615.8 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. 40% of websites need less resources to load. Images take 413.1 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 27.2 kB

  • Original 36.4 kB
  • After minification 31.3 kB
  • After compression 9.1 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 5.1 kB, which is 14% 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 27.2 kB or 75% of the original size.

Image Optimization

-19%

Potential reduce by 76.9 kB

  • Original 413.1 kB
  • After minification 336.2 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. Obviously, Cadabra needs image optimization as it can save up to 76.9 kB or 19% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-1%

Potential reduce by 1.0 kB

  • Original 152.6 kB
  • After minification 152.6 kB
  • After compression 151.6 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

-29%

Potential reduce by 3.9 kB

  • Original 13.8 kB
  • After minification 13.8 kB
  • After compression 9.8 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. Cadabra.science needs all CSS files to be minified and compressed as it can save up to 3.9 kB or 29% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (35%)

Requests Now

31

After Optimization

20

  • Images
  • JavaScript
  • CSS

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cadabra. 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 from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

cadabra.science

cadabra.science

215 ms

cadabra.science

cadabra.science

372 ms

MathJax.js

MathJax.js

25 ms

css

css

35 ms

css

css

69 ms

css

css

69 ms

cmun-bright.css

cmun-bright.css

90 ms

cadabra-web.css

cadabra-web.css

182 ms

cadabra.js

cadabra.js

289 ms

TeX-AMS-MML_HTMLorMML.js

TeX-AMS-MML_HTMLorMML.js

20 ms

cadabra2.png

cadabra2.png

276 ms

cse.js

cse.js

47 ms

download.png

download.png

108 ms

jupyter.png

jupyter.png

265 ms

quickstart.png

quickstart.png

183 ms

help.png

help.png

266 ms

tutorials.png

tutorials.png

271 ms

features.png

features.png

274 ms

paper.png

paper.png

272 ms

contrib.png

contrib.png

278 ms

puzzle.png

puzzle.png

354 ms

people.png

people.png

355 ms

license.png

license.png

360 ms

GitHub-Mark-64px.png

GitHub-Mark-64px.png

362 ms

cadabra2-cloud.png

cadabra2-cloud.png

365 ms

screenshot.png

screenshot.png

721 ms

cse_element__en.js

cse_element__en.js

55 ms

default+en.css

default+en.css

56 ms

default.css

default.css

57 ms

cmunbmr.woff

cmunbmr.woff

425 ms

cmunbbx.woff

cmunbbx.woff

430 ms

4UaHrEJCrhhnVA3DgluA96rp4Q.woff

4UaHrEJCrhhnVA3DgluA96rp4Q.woff

49 ms

cmunbmo.woff

cmunbmo.woff

518 ms

cmunbxo.woff

cmunbxo.woff

613 ms

QldgNThLqRwH-OJ1UHjlKENVzkWGVkL3GZQmAwLYxYWI2qfdm7Lpp4U8WR32kQ.woff

QldgNThLqRwH-OJ1UHjlKENVzkWGVkL3GZQmAwLYxYWI2qfdm7Lpp4U8WR32kQ.woff

54 ms

async-ads.js

async-ads.js

43 ms

branding.png

branding.png

27 ms

clear.png

clear.png

5 ms

nav_logo114.png

nav_logo114.png

11 ms

Accessibility Review

cadabra.science accessibility score

89

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

Links do not have a discernible name

Best Practices

cadabra.science best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

cadabra.science SEO score

92

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

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

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 Cadabra.science 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 Cadabra.science 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

cadabra.science

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