Tools & Wizards About Us
t-dance-a.biz screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

t-dance-a.biz

Zumba（ズンバ）曲・動画リスト（最新のZIN109まで）田村泰彦／AI Referee

Page Load Speed

32.5 sec in total

First Response

552 ms

Resources Loaded

22.6 sec

Page Rendered

9.3 sec

t-dance-a.biz screenshot

About Website

Click here to check amazing T Dance A content for Japan. Otherwise, check out these important facts you probably never knew about t-dance-a.biz

Zumba®（ズンバ）の曲名・動画リストです。ZIN（ジン）の全曲の（一覧）。 レッスンで使われている最新曲（2024年）や人気曲、Youtube（ユーチューブ）、振り付け（コリオ）など。（MOVE・田村泰彦）

Visit t-dance-a.biz

Key Findings

We analyzed T-dance-a.biz page load time and found that the first response time was 552 ms and then it took 31.9 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. Unfortunately, there were 3 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

t-dance-a.biz performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.3 s

7/100

10%

LCP (Largest Contentful Paint)

Value5.5 s

19/100

25%

SI (Speed Index)

Value14.8 s

1/100

10%

TBT (Total Blocking Time)

Value14,180 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value21.5 s

1/100

10%

Network Requests Diagram

t-dance-a.biz

552 ms

t-dance-a.biz

1457 ms

style.css

791 ms

lite-yt-embed.css

792 ms

lite-yt-embed.js

792 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that 6% of them (2 requests) were addressed to the original T-dance-a.biz, 19% (7 requests) were made to Machinemusic.org and 17% (6 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (20.5 sec) relates to the external source Ir-jp.amazon-adsystem.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 MB (82%)

Content Size

1.4 MB

After Optimization

251.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of T-dance-a.biz 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. 65% of websites need less resources to load. HTML takes 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 1.2 MB

  • Original 1.3 MB
  • After minification 969.9 kB
  • After compression 148.0 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 356.5 kB, which is 27% 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 1.2 MB or 89% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 1.1 kB
  • After minification 1.1 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. T Dance A images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 285 B

  • Original 43.5 kB
  • After minification 43.5 kB
  • After compression 43.3 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

-0%

Potential reduce by 0 B

  • Original 58.6 kB
  • After minification 58.6 kB
  • After compression 58.6 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. T-dance-a.biz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (45%)

Requests Now

20

After Optimization

11

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of T Dance A. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

t-dance-a.biz

t-dance-a.biz

552 ms

t-dance-a.biz

t-dance-a.biz

1457 ms

style.css

style.css

791 ms

lite-yt-embed.css

lite-yt-embed.css

792 ms

lite-yt-embed.js

lite-yt-embed.js

792 ms

jquery1.7.2.min.js

jquery1.7.2.min.js

791 ms

script.js

script.js

791 ms

analytics.js

analytics.js

791 ms

js

js

68 ms

widgets.js

widgets.js

106 ms

ir

ir

20490 ms

subpagemain02.jpg

subpagemain02.jpg

280 ms

ir

ir

20490 ms

ir

ir

20491 ms

videoseries

videoseries

537 ms

js

js

346 ms

analytics.js

analytics.js

339 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

179 ms

www-player.css

www-player.css

83 ms

www-embed-player.js

www-embed-player.js

109 ms

base.js

base.js

178 ms

collect

collect

97 ms

settings

settings

508 ms

ad_status.js

ad_status.js

330 ms

UhAHYkQc59SMm3ILQvX2LV9pHtXm_t6HT06w3DJ-zT8.js

UhAHYkQc59SMm3ILQvX2LV9pHtXm_t6HT06w3DJ-zT8.js

245 ms

embed.js

embed.js

92 ms

AIf8zZQSxDMO9gMcD2-orW5dcRQp0U29XpleKNVyRaEZ=s68-c-k-c0x00ffffff-no-rj

AIf8zZQSxDMO9gMcD2-orW5dcRQp0U29XpleKNVyRaEZ=s68-c-k-c0x00ffffff-no-rj

295 ms

KFOmCnqEu92Fr1Mu4mxM.woff

KFOmCnqEu92Fr1Mu4mxM.woff

239 ms

KFOlCnqEu92Fr1MmEU9fBBc-.woff

KFOlCnqEu92Fr1MmEU9fBBc-.woff

238 ms

button.856debeac157d9669cf51e73a08fbc93.js

button.856debeac157d9669cf51e73a08fbc93.js

70 ms

id

id

17 ms

Create

Create

186 ms

embeds

embeds

137 ms

tweet_button.2f70fb173b9000da126c79afe2098f02.ja.html

tweet_button.2f70fb173b9000da126c79afe2098f02.ja.html

125 ms

GenerateIT

GenerateIT

14 ms

log_event

log_event

17 ms

Accessibility Review

t-dance-a.biz accessibility score

92

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

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

t-dance-a.biz best practices score

75

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

Browser errors were logged to the console

SEO Factors

t-dance-a.biz SEO score

98

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 uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise T-dance-a.biz can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Japanese. Our system also found out that T-dance-a.biz 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

t-dance-a.biz

Open Graph description is not detected on the main page of T Dance A. 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: