Tools & Wizards About Us
sou.usen.com screenshot

Report Summary

  • 98

    Performance

    Renders faster than
    95% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

sou.usen.com

USEN Home TOP | 有線放送 家庭用 | USEN音楽放送

Page Load Speed

2.9 sec in total

First Response

532 ms

Resources Loaded

2.3 sec

Page Rendered

75 ms

sou.usen.com screenshot

About Website

Click here to check amazing Sou USEN content for Japan. Otherwise, check out these important facts you probably never knew about sou.usen.com

有線放送をご自宅で！USEN Homeは24時間いつでも楽しめる音楽放送サービスです。ヒットランキングや最新曲、USEN独自のトーク番組など幅広いラインナップでお届けします。

Visit sou.usen.com

Key Findings

We analyzed Sou.usen.com page load time and found that the first response time was 532 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

sou.usen.com performance score

98

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

89/100

10%

LCP (Largest Contentful Paint)

Value1.8 s

98/100

25%

SI (Speed Index)

Value3.3 s

91/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.8 s

100/100

10%

Network Requests Diagram

sou.usen.com

532 ms

sou.usen.com

728 ms

import.css

172 ms

roll_over.js

355 ms

swfobject.js

529 ms

Our browser made a total of 10 requests to load all elements on the main page. We found that all of those requests were addressed to Sou.usen.com and no external sources were called. The less responsive or slowest element that took the longest time to load (728 ms) belongs to the original domain Sou.usen.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 21.4 kB (76%)

Content Size

28.1 kB

After Optimization

6.7 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Sou.usen.com main page is 28.1 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. CSS take 14.3 kB which makes up the majority of the site volume.

HTML Optimization

-51%

Potential reduce by 1.4 kB

  • Original 2.7 kB
  • After minification 2.5 kB
  • After compression 1.3 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 1.4 kB or 51% of the original size.

JavaScript Optimization

-78%

Potential reduce by 8.7 kB

  • Original 11.1 kB
  • After minification 7.8 kB
  • After compression 2.5 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 8.7 kB or 78% of the original size.

CSS Optimization

-80%

Potential reduce by 11.4 kB

  • Original 14.3 kB
  • After minification 10.2 kB
  • After compression 2.9 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. Sou.usen.com needs all CSS files to be minified and compressed as it can save up to 11.4 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (38%)

Requests Now

8

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 8 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sou USEN. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sou.usen.com

sou.usen.com

532 ms

sou.usen.com

sou.usen.com

728 ms

import.css

import.css

172 ms

roll_over.js

roll_over.js

355 ms

swfobject.js

swfobject.js

529 ms

core.css

core.css

533 ms

details.css

details.css

537 ms

logo.gif

logo.gif

172 ms

logo_usen.gif

logo_usen.gif

174 ms

print.css

print.css

172 ms

Accessibility Review

sou.usen.com accessibility score

74

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.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

The document uses <meta http-equiv="refresh">

Best Practices

sou.usen.com best practices score

58

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

sou.usen.com SEO score

69

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sou.usen.com 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 Sou.usen.com main page’s claimed encoding is shift_jis. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

sou.usen.com

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