Access keirin.jp. ログインページ｜KEIRIN.JP

keirin.jp screenshot

43

Performance

Renders faster than
62% of other websites
63

Accessibility

Visual factors better than
that of 28% of websites
75

Best Practices

More advanced features
available than in
36% of websites
85

SEO

Google-friendlier than
56% of websites

First Response

407 ms

Resources Loaded

5.6 sec

Page Rendered

333 ms

keirin.jp screenshot

About Website

Visit keirin.jp now to see the best up-to-date KEIRIN content for Japan and also check out these interesting facts you probably never knew about keirin.jp

競輪オフィシャルサイト。開催情報、結果、ランキング情報、コラム、日本競輪学校の紹介。

Visit keirin.jp

Key Findings

We analyzed Keirin.jp page load time and found that the first response time was 407 ms and then it took 5.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

name

value

score

weighting

FCP (First Contentful Paint)

Value9.1 s

0/100

10%

LCP (Largest Contentful Paint)

Value10.7 s

0/100

25%

SI (Speed Index)

Value10.7 s

7/100

10%

TBT (Total Blocking Time)

Value200 ms

90/100

30%

CLS (Cumulative Layout Shift)

Value0.134

80/100

15%

TTI (Time to Interactive)

Value9.6 s

29/100

10%

keirin.jp

407 ms

829 ms

modern.css

308 ms

jquery.js

936 ms

jquery.idTabs.min.js

312 ms

Our browser made a total of 144 requests to load all elements on the main page. We found that all of those requests were addressed to Keirin.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Keirin.jp.

Content Size

1.1 MB

After Optimization

566.7 kB

In fact, the total size of Keirin.jp main page is 1.1 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 471.9 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 39.3 kB

Original 47.7 kB
After minification 44.4 kB
After compression 8.4 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 39.3 kB or 82% of the original size.

Image Optimization

-10%

Potential reduce by 45.4 kB

Original 471.9 kB
After minification 426.5 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. KEIRIN images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 250.2 kB

Original 341.8 kB
After minification 316.7 kB
After compression 91.6 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 250.2 kB or 73% of the original size.

CSS Optimization

-82%

Potential reduce by 183.2 kB

Original 223.5 kB
After minification 195.1 kB
After compression 40.2 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. Keirin.jp needs all CSS files to be minified and compressed as it can save up to 183.2 kB or 82% of the original size.

Requests Now

142

After Optimization

65

The browser has sent 142 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KEIRIN. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

[role] values are not valid

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

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

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

JA
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Keirin.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese 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 Keirin.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

keirin.jp

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