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Report Summary

About Website

Click here to check amazing Sun Java Seesaa content for Japan. Otherwise, check out these important facts you probably never knew about sunjava.seesaa.net

プログラミング言語Javaのインストール、環境設定からはじめるので、初心者でも大丈夫です。やさしいサンプルプログラムから、eclipseを使った本格的なアプリケーション開発まで図を使って学べます。クラス、メソッド、配列、APIの使い方についても解説します。

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name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

75/100

10%

LCP (Largest Contentful Paint)

Value2.4 s

91/100

25%

SI (Speed Index)

Value6.7 s

36/100

10%

TBT (Total Blocking Time)

Value2,620 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.039

100/100

15%

TTI (Time to Interactive)

Value13.7 s

11/100

10%

sunjava.seesaa.net

763 ms

styles-index.css

329 ms

user-common.css

417 ms

ad_plugin.js

420 ms

adsbygoogle.js

18 ms

Our browser made a total of 84 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Sunjava.seesaa.net, 11% (9 requests) were made to Plugins.mixi.jp and 10% (8 requests) were made to Apis.google.com. The less responsive or slowest element that took the longest time to load (2.5 sec) relates to the external source Test40.seesaa.net.

Content Size

885.1 kB

After Optimization

323.3 kB

In fact, the total size of Sunjava.seesaa.net main page is 885.1 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. 65% of websites need less resources to load. Javascripts take 719.2 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 37.8 kB

Original 51.5 kB
After minification 49.8 kB
After compression 13.7 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 37.8 kB or 73% of the original size.

Image Optimization

-4%

Potential reduce by 1.6 kB

Original 44.9 kB
After minification 43.3 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. Sun Java Seesaa images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 465.5 kB

Original 719.2 kB
After minification 667.4 kB
After compression 253.7 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 465.5 kB or 65% of the original size.

CSS Optimization

-82%

Potential reduce by 56.8 kB

Original 69.5 kB
After minification 56.1 kB
After compression 12.7 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. Sunjava.seesaa.net needs all CSS files to be minified and compressed as it can save up to 56.8 kB or 82% of the original size.

Requests Now

After Optimization

The browser has sent 80 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sun Java Seesaa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 37 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-*] attributes do not match their roles

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.

High

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

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/).

High

Document uses legible font sizes

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 Sunjava.seesaa.net 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 Sunjava.seesaa.net 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

sunjava.seesaa.net

Open Graph data is detected on the main page of Sun Java Seesaa. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

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Performance

Accessibility

Best Practices

SEO

Java初心者入門講座

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)