Tools & Wizards About Us
covid19-ai.jp screenshot

Report Summary

  • 48

    Performance

    Renders faster than
    66% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

covid19-ai.jp

COVID-19 AI and Simulation Project | The purpose of this project is to achieve a balance between economic activities and measures to prevent the sprea...

Page Load Speed

5.6 sec in total

First Response

502 ms

Resources Loaded

4 sec

Page Rendered

1.1 sec

covid19-ai.jp screenshot

About Website

Welcome to covid19-ai.jp homepage info - get ready to check COVID 19 AI best content right away, or after learning these important things about covid19-ai.jp

2023.12.21 The purpose of this project is to achieve a balance between economic activities and measures to prevent the spread of the novel coronavirus (COVID-19). We collect and analyze data on the ea...

Visit covid19-ai.jp

Key Findings

We analyzed Covid19-ai.jp page load time and found that the first response time was 502 ms and then it took 5.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

covid19-ai.jp performance score

48

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value12.5 s

0/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value210 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0.147

77/100

15%

TTI (Time to Interactive)

Value6.0 s

64/100

10%

Network Requests Diagram

covid19-ai.jp

502 ms

570 ms

gtm.js

111 ms

lity.css

45 ms

form.css

188 ms

Our browser made a total of 40 requests to load all elements on the main page. We found that 75% of them (30 requests) were addressed to the original Covid19-ai.jp, 8% (3 requests) were made to Googletagmanager.com and 5% (2 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Covid19-ai.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 86.9 kB (4%)

Content Size

2.3 MB

After Optimization

2.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Covid19-ai.jp main page is 2.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 2.1 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 66.2 kB

  • Original 79.8 kB
  • After minification 66.4 kB
  • After compression 13.6 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 13.4 kB, which is 17% 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 66.2 kB or 83% of the original size.

Image Optimization

-0%

Potential reduce by 9.2 kB

  • Original 2.1 MB
  • After minification 2.1 MB

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. COVID 19 AI images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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

-28%

Potential reduce by 11.5 kB

  • Original 41.0 kB
  • After minification 40.8 kB
  • After compression 29.5 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. Covid19-ai.jp needs all CSS files to be minified and compressed as it can save up to 11.5 kB or 28% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (47%)

Requests Now

38

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of COVID 19 AI. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

covid19-ai.jp

covid19-ai.jp

502 ms

570 ms

gtm.js

gtm.js

111 ms

lity.css

lity.css

45 ms

form.css

form.css

188 ms

style.min.css

style.min.css

341 ms

style.css

style.css

498 ms

style.css

style.css

664 ms

slick.css

slick.css

29 ms

front.min.css

front.min.css

498 ms

jquery.min.js

jquery.min.js

669 ms

jquery-migrate.min.js

jquery-migrate.min.js

501 ms

slick.min.js

slick.min.js

30 ms

loadmore.js

loadmore.js

502 ms

lity.js

lity.js

35 ms

navigation.js

navigation.js

659 ms

library.js

library.js

658 ms

custom.js

custom.js

693 ms

front.min.js

front.min.js

693 ms

js

js

81 ms

analytics.js

analytics.js

19 ms

collect

collect

15 ms

collect

collect

29 ms

js

js

88 ms

logo@2x.png

logo@2x.png

165 ms

icon_arrow_black_d@2x.svg

icon_arrow_black_d@2x.svg

165 ms

content-1-2-1.png

content-1-2-1.png

330 ms

image-3-2.png

image-3-2.png

495 ms

920ba5490444fc4de6dfff385f192e48-1.png

920ba5490444fc4de6dfff385f192e48-1.png

494 ms

ryoji-iwata-dlBXwGlzfcs-unsplash-2.png

ryoji-iwata-dlBXwGlzfcs-unsplash-2.png

663 ms

switch_english@2x.png

switch_english@2x.png

329 ms

top_button.png

top_button.png

329 ms

top_back.png

top_back.png

1311 ms

Screenshot-2023-05-22-at-14.31-1.png

Screenshot-2023-05-22-at-14.31-1.png

821 ms

doc-active.png

doc-active.png

440 ms

doc-none.png

doc-none.png

600 ms

2022_RQ01-scaled-1.jpg

2022_RQ01-scaled-1.jpg

929 ms

2022_RQ02-scaled-1.jpg

2022_RQ02-scaled-1.jpg

1099 ms

RQ_back.png

RQ_back.png

1256 ms

logo_corona_go_jp@2x.jpg

logo_corona_go_jp@2x.jpg

771 ms

Accessibility Review

covid19-ai.jp accessibility score

88

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

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

covid19-ai.jp best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

covid19-ai.jp SEO score

86

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

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 Covid19-ai.jp 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 Covid19-ai.jp 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

covid19-ai.jp

Open Graph data is detected on the main page of COVID 19 AI. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: