Access lets-dance.jp. 社交ダンス応援サイト「レッツダンス」

name

value

score

weighting

FCP (First Contentful Paint)

Value6.5 s

2/100

10%

LCP (Largest Contentful Paint)

Value10.9 s

0/100

25%

SI (Speed Index)

Value11.4 s

5/100

10%

TBT (Total Blocking Time)

Value740 ms

40/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value12.7 s

14/100

10%

lets-dance.jp

527 ms

lets-dance.jp

938 ms

www.lets-dance.jp

2231 ms

import.css

491 ms

css.js

492 ms

Our browser made a total of 88 requests to load all elements on the main page. We found that 73% of them (64 requests) were addressed to the original Lets-dance.jp, 20% (18 requests) were made to Platform.twitter.com and 2% (2 requests) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (2.2 sec) belongs to the original domain Lets-dance.jp.

Content Size

1.1 MB

After Optimization

867.2 kB

In fact, the total size of Lets-dance.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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 815.9 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 116.6 kB

Original 135.3 kB
After minification 96.7 kB
After compression 18.7 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. This page needs HTML code to be minified as it can gain 38.6 kB, which is 29% 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 116.6 kB or 86% of the original size.

Image Optimization

-1%

Potential reduce by 5.5 kB

Original 815.9 kB
After minification 810.5 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. Lets Dance images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 63.4 kB

Original 91.0 kB
After minification 82.9 kB
After compression 27.6 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 63.4 kB or 70% of the original size.

CSS Optimization

-84%

Potential reduce by 54.4 kB

Original 64.8 kB
After minification 40.7 kB
After compression 10.4 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. Lets-dance.jp needs all CSS files to be minified and compressed as it can save up to 54.4 kB or 84% of the original size.

Requests Now

After Optimization

The browser has sent 83 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lets Dance. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 11 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

ARIA input fields do not have accessible names

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

<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

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

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

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 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 Lets-dance.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 Lets-dance.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

lets-dance.jp

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

Report Summary

Performance

Accessibility

Best Practices

SEO

社交ダンス応援サイト「レッツダンス」

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

lets-dance.jp

lets-dance.jp

www.lets-dance.jp

import.css

css.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

lets-dance.jp

lets-dance.jp

www.lets-dance.jp

import.css

css.js

navi.js

win_op.js

site.js

jquery-1.4.2.min.js

js

set.css

common.css

contents.css

table.css

bloc.css

bloc_alpha.css

popup_import.css

bbs.css

print.css

popup.css

bg_header.gif

logo.gif

btn_gnavi_01.gif

btn_gnavi_02.gif

btn_gnavi_03.gif

btn_gnavi_04.gif

btn_gnavi_06.gif

btn_off.jpg

tit_bloc_search.gif

btn_bloc_search.jpg

map.gif

bbs1.jpg

bbs2.jpg

column_endo.jpg

column_fujimoto.jpg

column_uchibori.jpg

column_iwakura.jpg

interview.jpg

recruit.jpg

kids.jpg

tit_bloc_recommend.gif

resize_image.php

btn_bloc_recommend.jpg