Report Summary

  • 5

    Performance

    Renders faster than
    21% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

f4samurai.jp

株式会社 f4samurai

Page Load Speed

3.5 sec in total

First Response

561 ms

Resources Loaded

2.8 sec

Page Rendered

129 ms

f4samurai.jp screenshot

About Website

Visit f4samurai.jp now to see the best up-to-date F 4 Samurai content for Japan and also check out these interesting facts you probably never knew about f4samurai.jp

株式会社f4samuraiは、良質なモバイルオンラインゲームを中心に“今日より明日を楽しくする”サービス創りに努める企画開発会社です

Visit f4samurai.jp

Key Findings

We analyzed F4samurai.jp page load time and found that the first response time was 561 ms and then it took 2.9 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

f4samurai.jp performance score

5

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.3 s

3/100

10%

LCP (Largest Contentful Paint)

Value19.0 s

0/100

25%

SI (Speed Index)

Value14.9 s

1/100

10%

TBT (Total Blocking Time)

Value1,620 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.8

5/100

15%

TTI (Time to Interactive)

Value20.2 s

2/100

10%

Network Requests Diagram

f4samurai.jp

561 ms

base.css

620 ms

jquery.js

1239 ms

swiper.js

791 ms

common.js

504 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 58% of them (14 requests) were addressed to the original F4samurai.jp, 17% (4 requests) were made to S.ytimg.com and 8% (2 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain F4samurai.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 471.2 kB (31%)

Content Size

1.5 MB

After Optimization

1.1 MB

In fact, the total size of F4samurai.jp main page is 1.5 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. 25% of websites need less resources to load. Images take 886.8 kB which makes up the majority of the site volume.

HTML Optimization

-64%

Potential reduce by 2.8 kB

  • Original 4.3 kB
  • After minification 4.3 kB
  • After compression 1.5 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 2.8 kB or 64% of the original size.

Image Optimization

-0%

Potential reduce by 96 B

  • Original 886.8 kB
  • After minification 886.7 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. F 4 Samurai images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 239.5 kB

  • Original 371.3 kB
  • After minification 369.3 kB
  • After compression 131.8 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 239.5 kB or 65% of the original size.

CSS Optimization

-83%

Potential reduce by 228.8 kB

  • Original 275.2 kB
  • After minification 266.4 kB
  • After compression 46.4 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. F4samurai.jp needs all CSS files to be minified and compressed as it can save up to 228.8 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (43%)

Requests Now

21

After Optimization

12

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of F 4 Samurai. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

f4samurai.jp accessibility score

75

Accessibility Issues

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 valid value for its [lang] attribute.

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

f4samurai.jp best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

f4samurai.jp SEO score

83

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

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

    JA

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise F4samurai.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that F4samurai.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 F 4 Samurai. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: