Report Summary

  • 4

    Performance

    Renders faster than
    20% of other websites

  • 48

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

jaaf.or.jp

日本陸上競技連盟公式サイト - Japan Association of Athletics Federations

Page Load Speed

19.5 sec in total

First Response

520 ms

Resources Loaded

18.9 sec

Page Rendered

99 ms

jaaf.or.jp screenshot

About Website

Welcome to jaaf.or.jp homepage info - get ready to check Jaaf best content for Japan right away, or after learning these important things about jaaf.or.jp

日本陸上競技連盟公式サイト:日本における陸上競技界を統轄し、代表する団体として、陸上競技を通じスポーツ文化の普及及び振興を図り、もって国民の心身の健全な発達に寄与し、豊かな人間性を涵養することを目的としています。

Visit jaaf.or.jp

Key Findings

We analyzed Jaaf.or.jp page load time and found that the first response time was 520 ms and then it took 19 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

jaaf.or.jp performance score

4

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.7 s

2/100

10%

LCP (Largest Contentful Paint)

Value6.7 s

8/100

25%

SI (Speed Index)

Value23.7 s

0/100

10%

TBT (Total Blocking Time)

Value9,790 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.608

10/100

15%

TTI (Time to Interactive)

Value32.1 s

0/100

10%

Network Requests Diagram

jaaf.or.jp

520 ms

404.html

900 ms

style.css

535 ms

less-1.3.0.min.js

551 ms

modernizr-2.5.3-respond-1.1.0.min.js

16893 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 62% of them (29 requests) were addressed to the original Jaaf.or.jp, 19% (9 requests) were made to Google.com and 4% (2 requests) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (16.9 sec) belongs to the original domain Jaaf.or.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (78%)

Content Size

1.4 MB

After Optimization

302.8 kB

In fact, the total size of Jaaf.or.jp main page is 1.4 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. 45% of websites need less resources to load. Javascripts take 900.0 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 224.9 kB

  • Original 256.6 kB
  • After minification 253.1 kB
  • After compression 31.7 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 224.9 kB or 88% of the original size.

Image Optimization

-80%

Potential reduce by 102.4 kB

  • Original 128.4 kB
  • After minification 26.0 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, Jaaf needs image optimization as it can save up to 102.4 kB or 80% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-74%

Potential reduce by 666.5 kB

  • Original 900.0 kB
  • After minification 638.6 kB
  • After compression 233.6 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 666.5 kB or 74% of the original size.

CSS Optimization

-84%

Potential reduce by 60.1 kB

  • Original 71.6 kB
  • After minification 54.0 kB
  • After compression 11.5 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. Jaaf.or.jp needs all CSS files to be minified and compressed as it can save up to 60.1 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (50%)

Requests Now

44

After Optimization

22

The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jaaf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

jaaf.or.jp accessibility score

48

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

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

jaaf.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

High

Page has valid source maps

SEO Factors

jaaf.or.jp SEO score

82

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

Links do not have descriptive text

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

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 Jaaf.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 Jaaf.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 description is not detected on the main page of Jaaf. 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: