Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

cosine.org

Cosine Jeremiah and his Musings | Life and Ruby and Security

Page Load Speed

3.3 sec in total

First Response

1 sec

Resources Loaded

1.9 sec

Page Rendered

329 ms

cosine.org screenshot

About Website

Click here to check amazing Cosine content. Otherwise, check out these important facts you probably never knew about cosine.org

This week I found what I thought was a bug in Rails 2.3: it does not check the anti-CSRF authenticity token for AJAX requests. Due to years of experience with

Visit cosine.org

Key Findings

We analyzed Cosine.org page load time and found that the first response time was 1 sec and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

cosine.org performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

77/100

25%

SI (Speed Index)

Value5.3 s

59/100

10%

TBT (Total Blocking Time)

Value10,280 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.137

79/100

15%

TTI (Time to Interactive)

Value16.3 s

5/100

10%

Network Requests Diagram

cosine.org

1026 ms

style.css

138 ms

show_ads.js

30 ms

wp-embed.min.js

203 ms

wp-emoji-release.min.js

133 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 45% of them (15 requests) were addressed to the original Cosine.org, 15% (5 requests) were made to Pagead2.googlesyndication.com and 9% (3 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Cosine.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 62.2 kB (25%)

Content Size

250.9 kB

After Optimization

188.7 kB

In fact, the total size of Cosine.org main page is 250.9 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. Javascripts take 154.7 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 28.9 kB

  • Original 40.3 kB
  • After minification 36.6 kB
  • After compression 11.4 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 28.9 kB or 72% of the original size.

Image Optimization

-11%

Potential reduce by 5.9 kB

  • Original 55.9 kB
  • After minification 50.0 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. Obviously, Cosine needs image optimization as it can save up to 5.9 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-18%

Potential reduce by 27.4 kB

  • Original 154.7 kB
  • After minification 154.7 kB
  • After compression 127.3 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 27.4 kB or 18% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (32%)

Requests Now

31

After Optimization

21

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cosine. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

cosine.org accessibility score

72

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

<frame> or <iframe> elements do not have a title

High

Form elements do not have associated labels

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

cosine.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

cosine.org SEO score

77

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cosine.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 Cosine.org 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 description is not detected on the main page of Cosine. 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: