Report Summary

  • 26

    Performance

    Renders faster than
    47% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 90

    SEO

    Google-friendlier than
    69% of websites

duel.co.jp

釣具の総合メーカー デュエル

Page Load Speed

6.2 sec in total

First Response

1.1 sec

Resources Loaded

4.8 sec

Page Rendered

245 ms

duel.co.jp screenshot

About Website

Visit duel.co.jp now to see the best up-to-date Duel content for Japan and also check out these interesting facts you probably never knew about duel.co.jp

エギ、ルアー、ライン等釣具の総合メーカー(株)デュエルのオフィシャルサイトです。

Visit duel.co.jp

Key Findings

We analyzed Duel.co.jp page load time and found that the first response time was 1.1 sec and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

duel.co.jp performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

12/100

10%

LCP (Largest Contentful Paint)

Value33.8 s

0/100

25%

SI (Speed Index)

Value8.1 s

21/100

10%

TBT (Total Blocking Time)

Value1,020 ms

26/100

30%

CLS (Cumulative Layout Shift)

Value0.054

98/100

15%

TTI (Time to Interactive)

Value40.5 s

0/100

10%

Network Requests Diagram

www.duel.co.jp

1138 ms

fontello.css

161 ms

style.css

322 ms

global_nav.css

355 ms

jquery-1.11.3.min.js

515 ms

Our browser made a total of 83 requests to load all elements on the main page. We found that 84% of them (70 requests) were addressed to the original Duel.co.jp, 5% (4 requests) were made to Img.youtube.com and 4% (3 requests) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Duel.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 196.6 kB (16%)

Content Size

1.2 MB

After Optimization

1.0 MB

In fact, the total size of Duel.co.jp main page is 1.2 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. 55% of websites need less resources to load. Images take 976.3 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 36.2 kB

  • Original 44.6 kB
  • After minification 39.0 kB
  • After compression 8.5 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. This page needs HTML code to be minified as it can gain 5.7 kB, which is 13% 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 36.2 kB or 81% of the original size.

Image Optimization

-5%

Potential reduce by 51.1 kB

  • Original 976.3 kB
  • After minification 925.2 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. Duel images are well optimized though.

JavaScript Optimization

-51%

Potential reduce by 91.1 kB

  • Original 177.4 kB
  • After minification 176.9 kB
  • After compression 86.4 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 91.1 kB or 51% of the original size.

CSS Optimization

-79%

Potential reduce by 18.3 kB

  • Original 23.1 kB
  • After minification 21.6 kB
  • After compression 4.9 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. Duel.co.jp needs all CSS files to be minified and compressed as it can save up to 18.3 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (10%)

Requests Now

78

After Optimization

70

The browser has sent 78 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Duel. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

duel.co.jp accessibility score

84

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

duel.co.jp best practices score

67

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

duel.co.jp SEO score

90

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

    JA

  • Language Claimed

    JP

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Duel.co.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it does not match the claimed language. Our system also found out that Duel.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 data is detected on the main page of Duel. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: