Report Summary

  • 56

    Performance

    Renders faster than
    73% of other websites

  • 57

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

light-source.co.jp

TOP PAGE | ライトソース株式会社

Page Load Speed

3.3 sec in total

First Response

525 ms

Resources Loaded

2.7 sec

Page Rendered

90 ms

light-source.co.jp screenshot

About Website

Click here to check amazing Light Source content. Otherwise, check out these important facts you probably never knew about light-source.co.jp

ライトソース株式会社

Visit light-source.co.jp

Key Findings

We analyzed Light-source.co.jp page load time and found that the first response time was 525 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

light-source.co.jp performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value5.9 s

14/100

25%

SI (Speed Index)

Value4.9 s

66/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.369

29/100

15%

TTI (Time to Interactive)

Value3.9 s

88/100

10%

Network Requests Diagram

light-source.co.jp

525 ms

www.light-source.co.jp

1085 ms

style20190428.css

182 ms

vue.js

20 ms

gs_flash_115-57_ja.js

522 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that 50% of them (4 requests) were addressed to the original Light-source.co.jp, 25% (2 requests) were made to Seal.globalsign.com and 13% (1 request) were made to Cdn.jsdelivr.net. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Light-source.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 10.3 kB (32%)

Content Size

31.8 kB

After Optimization

21.5 kB

In fact, the total size of Light-source.co.jp main page is 31.8 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. Images take 23.2 kB which makes up the majority of the site volume.

HTML Optimization

-62%

Potential reduce by 3.8 kB

  • Original 6.1 kB
  • After minification 5.7 kB
  • After compression 2.3 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 3.8 kB or 62% of the original size.

Image Optimization

-22%

Potential reduce by 5.2 kB

  • Original 23.2 kB
  • After minification 18.0 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. Obviously, Light Source needs image optimization as it can save up to 5.2 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-12%

Potential reduce by 82 B

  • Original 703 B
  • After minification 703 B
  • After compression 621 B

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 82 B or 12% of the original size.

CSS Optimization

-66%

Potential reduce by 1.2 kB

  • Original 1.8 kB
  • After minification 1.5 kB
  • After compression 615 B

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. Light-source.co.jp needs all CSS files to be minified and compressed as it can save up to 1.2 kB or 66% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Light Source. According to our analytics all requests are already optimized.

Accessibility Review

light-source.co.jp accessibility score

57

Accessibility Issues

Names and labels

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.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

light-source.co.jp best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

light-source.co.jp SEO score

92

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Light-source.co.jp can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Japanese language. Our system also found out that Light-source.co.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

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