Report Summary

  • 41

    Performance

    Renders faster than
    60% 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

  • 88

    SEO

    Google-friendlier than
    65% of websites

j-circ.or.jp

一般社団法人 日本循環器学会

Page Load Speed

19.6 sec in total

First Response

1.8 sec

Resources Loaded

6.6 sec

Page Rendered

11.2 sec

j-circ.or.jp screenshot

About Website

Visit j-circ.or.jp now to see the best up-to-date J Circ content for Japan and also check out these interesting facts you probably never knew about j-circ.or.jp

国民の健康にとって、心血管疾患はいまや悪性腫瘍と双璧をなす重要な克服課題です。2万名を超える会員を擁する日本循環器学会(JCS)は、循環器疾患の研究と診療の両面から、積極的に社会に貢献してまいります。BLS、ACLS講習会をはじめとする心肺蘇生法の普及、また禁煙推進活動など、社会的に関心の高いテーマについても積極的に取り組んでいます。

Visit j-circ.or.jp

Key Findings

We analyzed J-circ.or.jp page load time and found that the first response time was 1.8 sec and then it took 17.8 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

j-circ.or.jp performance score

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value12.3 s

0/100

10%

LCP (Largest Contentful Paint)

Value26.2 s

0/100

25%

SI (Speed Index)

Value13.4 s

2/100

10%

TBT (Total Blocking Time)

Value250 ms

84/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value14.1 s

10/100

10%

Network Requests Diagram

www.j-circ.or.jp

1809 ms

bundle.css

1252 ms

jquery.min.js

20 ms

bundle.js

905 ms

classic-themes.min.css

540 ms

Our browser made a total of 73 requests to load all elements on the main page. We found that 79% of them (58 requests) were addressed to the original J-circ.or.jp, 8% (6 requests) were made to Fonts.gstatic.com and 3% (2 requests) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (3.1 sec) belongs to the original domain J-circ.or.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (5%)

Content Size

20.6 MB

After Optimization

19.5 MB

In fact, the total size of J-circ.or.jp main page is 20.6 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. 55% of websites need less resources to load. Images take 20.2 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 72.4 kB

  • Original 85.9 kB
  • After minification 78.6 kB
  • After compression 13.5 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 72.4 kB or 84% of the original size.

Image Optimization

-4%

Potential reduce by 806.3 kB

  • Original 20.2 MB
  • After minification 19.4 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. J Circ images are well optimized though.

JavaScript Optimization

-31%

Potential reduce by 57.8 kB

  • Original 188.3 kB
  • After minification 188.3 kB
  • After compression 130.5 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 57.8 kB or 31% of the original size.

CSS Optimization

-85%

Potential reduce by 149.6 kB

  • Original 175.4 kB
  • After minification 174.5 kB
  • After compression 25.8 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. J-circ.or.jp needs all CSS files to be minified and compressed as it can save up to 149.6 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (22%)

Requests Now

65

After Optimization

51

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of J Circ. 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 as a result speed up the page load time.

Accessibility Review

j-circ.or.jp accessibility score

88

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

Best Practices

j-circ.or.jp best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

j-circ.or.jp SEO score

88

Search Engine Optimization Advices

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise J-circ.or.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it matches the claimed language. Our system also found out that J-circ.or.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

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