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coronium.io screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

coronium.io

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Page Load Speed

1.2 sec in total

First Response

290 ms

Resources Loaded

850 ms

Page Rendered

85 ms

coronium.io screenshot

About Website

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Key Findings

We analyzed Coronium.io page load time and found that the first response time was 290 ms and then it took 935 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

coronium.io performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

20/100

10%

LCP (Largest Contentful Paint)

Value8.3 s

2/100

25%

SI (Speed Index)

Value7.6 s

25/100

10%

TBT (Total Blocking Time)

Value960 ms

29/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value15.2 s

7/100

10%

Network Requests Diagram

coronium.io

290 ms

css

66 ms

font-awesome.min.css

90 ms

bootstrap-theme.min.css

168 ms

bootstrap.min.css

250 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 57% of them (8 requests) were addressed to the original Coronium.io, 21% (3 requests) were made to Platform.twitter.com and 14% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (315 ms) belongs to the original domain Coronium.io.

Page Optimization Overview & Recommendations

Page size can be reduced by 236.1 kB (72%)

Content Size

328.9 kB

After Optimization

92.7 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Coronium.io main page is 328.9 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. 30% of websites need less resources to load. CSS take 173.2 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 9.2 kB

  • Original 12.2 kB
  • After minification 10.2 kB
  • After compression 2.9 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 2.0 kB, which is 16% 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 9.2 kB or 76% of the original size.

JavaScript Optimization

-58%

Potential reduce by 82.6 kB

  • Original 143.5 kB
  • After minification 143.5 kB
  • After compression 60.8 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 82.6 kB or 58% of the original size.

CSS Optimization

-83%

Potential reduce by 144.3 kB

  • Original 173.2 kB
  • After minification 172.7 kB
  • After compression 29.0 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. Coronium.io needs all CSS files to be minified and compressed as it can save up to 144.3 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (67%)

Requests Now

12

After Optimization

4

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coronium. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

coronium.io

coronium.io

290 ms

css

css

66 ms

font-awesome.min.css

font-awesome.min.css

90 ms

bootstrap-theme.min.css

bootstrap-theme.min.css

168 ms

bootstrap.min.css

bootstrap.min.css

250 ms

app.css

app.css

186 ms

jquery.min.js

jquery.min.js

315 ms

bootstrap.min.js

bootstrap.min.js

225 ms

widgets.js

widgets.js

79 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

261 ms

analytics.js

analytics.js

22 ms

button.0308b81ff1714e446f674b5b9793f2cd.js

button.0308b81ff1714e446f674b5b9793f2cd.js

126 ms

collect

collect

12 ms

tweet_button.b9740740e0bcf9b0657c5b11bd4388da.en.html

tweet_button.b9740740e0bcf9b0657c5b11bd4388da.en.html

47 ms

Accessibility Review

coronium.io accessibility score

93

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

Best Practices

coronium.io 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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

coronium.io 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 Coronium.io 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 Coronium.io 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

coronium.io

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