Report Summary

  • 49

    Performance

    Renders faster than
    67% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

theory.ne.jp

THEORY(セオリー) | 著名人・芸能人の有料メールマガジン/メルマガ

Page Load Speed

11 sec in total

First Response

955 ms

Resources Loaded

9.9 sec

Page Rendered

203 ms

About Website

Click here to check amazing THEORY content for Japan. Otherwise, check out these important facts you probably never knew about theory.ne.jp

ビジネスからファッションまで幅広いメルマガを配信しております!

Visit theory.ne.jp

Key Findings

We analyzed Theory.ne.jp page load time and found that the first response time was 955 ms and then it took 10.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

theory.ne.jp performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

12/100

10%

LCP (Largest Contentful Paint)

Value5.3 s

22/100

25%

SI (Speed Index)

Value6.5 s

39/100

10%

TBT (Total Blocking Time)

Value540 ms

55/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.1 s

64/100

10%

Network Requests Diagram

theory.ne.jp

955 ms

import.css

325 ms

slide.css

345 ms

jquery.min.js

1229 ms

slide.js

529 ms

Our browser made a total of 84 requests to load all elements on the main page. We found that 96% of them (81 requests) were addressed to the original Theory.ne.jp, 2% (2 requests) were made to Google-analytics.com and 1% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (5.7 sec) belongs to the original domain Theory.ne.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 250.9 kB (47%)

Content Size

538.0 kB

After Optimization

287.1 kB

In fact, the total size of Theory.ne.jp main page is 538.0 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. 15% of websites need less resources to load. Images take 230.8 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 11.9 kB

  • Original 15.0 kB
  • After minification 13.3 kB
  • After compression 3.1 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 1.7 kB, which is 11% 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 11.9 kB or 80% of the original size.

Image Optimization

-12%

Potential reduce by 28.0 kB

  • Original 230.8 kB
  • After minification 202.9 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. Obviously, THEORY needs image optimization as it can save up to 28.0 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-58%

Potential reduce by 74.6 kB

  • Original 128.1 kB
  • After minification 124.2 kB
  • After compression 53.5 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 74.6 kB or 58% of the original size.

CSS Optimization

-83%

Potential reduce by 136.4 kB

  • Original 164.1 kB
  • After minification 147.9 kB
  • After compression 27.7 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. Theory.ne.jp needs all CSS files to be minified and compressed as it can save up to 136.4 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (34%)

Requests Now

70

After Optimization

46

The browser has sent 70 CSS, Javascripts, AJAX and image requests in order to completely render the main page of THEORY. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

theory.ne.jp accessibility score

76

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Best Practices

theory.ne.jp 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

theory.ne.jp SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

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 Theory.ne.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 Theory.ne.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 THEORY. 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: