Report Summary

  • 80

    Performance

    Renders faster than
    86% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

spacediva.jp

衛星デジタル音楽放送 SPACE DiVA-スペースディーバ

Page Load Speed

4.3 sec in total

First Response

505 ms

Resources Loaded

3.7 sec

Page Rendered

178 ms

spacediva.jp screenshot

About Website

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

衛星デジタル音楽放送SPACE DiVA(スペースディーバ)番組案内

Visit spacediva.jp

Key Findings

We analyzed Spacediva.jp page load time and found that the first response time was 505 ms and then it took 3.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

spacediva.jp performance score

80

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

61/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

51/100

25%

SI (Speed Index)

Value5.0 s

63/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.7 s

97/100

10%

Network Requests Diagram

spacediva.jp

505 ms

www.spacediva.jp

1014 ms

screen.css

824 ms

class.css

510 ms

common.js

349 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 95% of them (39 requests) were addressed to the original Spacediva.jp, 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Spacediva.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 37.6 kB (68%)

Content Size

54.9 kB

After Optimization

17.3 kB

In fact, the total size of Spacediva.jp main page is 54.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 5% of websites need less resources to load. CSS take 27.8 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 12.1 kB

  • Original 16.6 kB
  • After minification 15.9 kB
  • After compression 4.5 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 12.1 kB or 73% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 2.9 kB
  • After minification 2.9 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. SPACE DiVA images are well optimized though.

JavaScript Optimization

-20%

Potential reduce by 1.5 kB

  • Original 7.6 kB
  • After minification 7.5 kB
  • After compression 6.1 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 1.5 kB or 20% of the original size.

CSS Optimization

-86%

Potential reduce by 24.0 kB

  • Original 27.8 kB
  • After minification 22.2 kB
  • After compression 3.8 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. Spacediva.jp needs all CSS files to be minified and compressed as it can save up to 24.0 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (49%)

Requests Now

39

After Optimization

20

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SPACE DiVA. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

spacediva.jp accessibility score

100

Accessibility Issues

Best Practices

spacediva.jp best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

spacediva.jp SEO score

67

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Spacediva.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 Spacediva.jp 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

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