Tools & Wizards About Us
sansu.org screenshot

Report Summary

  • 62

    Performance

    Renders faster than
    77% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

sansu.org

算数にチャレンジ！！

Page Load Speed

2.8 sec in total

First Response

840 ms

Resources Loaded

1.5 sec

Page Rendered

438 ms

sansu.org screenshot

About Website

Visit sansu.org now to see the best up-to-date Sansu content for Japan and also check out these interesting facts you probably never knew about sansu.org

日本の小学生が学ぶ算数の名問題を毎週掲載します。あなたは日本の小学生に勝てますか！？

Visit sansu.org

Key Findings

We analyzed Sansu.org page load time and found that the first response time was 840 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

sansu.org performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

77/100

10%

LCP (Largest Contentful Paint)

Value2.8 s

84/100

25%

SI (Speed Index)

Value3.8 s

84/100

10%

TBT (Total Blocking Time)

Value1,040 ms

26/100

30%

CLS (Cumulative Layout Shift)

Value0.102

89/100

15%

TTI (Time to Interactive)

Value8.7 s

37/100

10%

Network Requests Diagram

sansu.org

840 ms

plusone.js

99 ms

show_ads.js

27 ms

cb=gapi.loaded_0

26 ms

widgets.js

149 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 21% of them (8 requests) were addressed to the original Sansu.org, 18% (7 requests) were made to Apis.google.com and 13% (5 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (840 ms) belongs to the original domain Sansu.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 65.6 kB (55%)

Content Size

118.5 kB

After Optimization

52.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sansu.org main page is 118.5 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. 35% of websites need less resources to load. Javascripts take 55.3 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 25.8 kB

  • Original 33.5 kB
  • After minification 32.7 kB
  • After compression 7.7 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 25.8 kB or 77% of the original size.

Image Optimization

-21%

Potential reduce by 6.2 kB

  • Original 29.4 kB
  • After minification 23.2 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. Obviously, Sansu needs image optimization as it can save up to 6.2 kB or 21% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-61%

Potential reduce by 33.5 kB

  • Original 55.3 kB
  • After minification 55.2 kB
  • After compression 21.8 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 33.5 kB or 61% of the original size.

CSS Optimization

-27%

Potential reduce by 65 B

  • Original 242 B
  • After minification 220 B
  • After compression 177 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. Sansu.org needs all CSS files to be minified and compressed as it can save up to 65 B or 27% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (44%)

Requests Now

36

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sansu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

sansu.org

sansu.org

840 ms

plusone.js

plusone.js

99 ms

show_ads.js

show_ads.js

27 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

26 ms

widgets.js

widgets.js

149 ms

ca-pub-2195909088610826.js

ca-pub-2195909088610826.js

145 ms

zrt_lookup.html

zrt_lookup.html

49 ms

show_ads_impl.js

show_ads_impl.js

49 ms

home_on.GIF

home_on.GIF

338 ms

titleF.gif

titleF.gif

391 ms

ads

ads

292 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

55 ms

fastbutton

fastbutton

80 ms

sansu.gif

sansu.gif

264 ms

ranking.gif

ranking.gif

325 ms

amazoh32.gif

amazoh32.gif

324 ms

arena32.gif

arena32.gif

379 ms

noumen.jpg

noumen.jpg

681 ms

osd.js

osd.js

19 ms

button.831500944bc3eb7ea5276ccdc3f71d2e.js

button.831500944bc3eb7ea5276ccdc3f71d2e.js

159 ms

postmessageRelay

postmessageRelay

54 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

49 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

49 ms

W5F8_SL0XFawnjxHGsZjJA.ttf

W5F8_SL0XFawnjxHGsZjJA.ttf

122 ms

api.js

api.js

42 ms

core:rpc:shindig.random:shindig.sha1.js

core:rpc:shindig.random:shindig.sha1.js

77 ms

2536007149-postmessagerelay.js

2536007149-postmessagerelay.js

73 ms

tweet_button.6a78875565a912489e9aef879c881358.ja.html

tweet_button.6a78875565a912489e9aef879c881358.ja.html

43 ms

css

css

56 ms

m_js_controller.js

m_js_controller.js

32 ms

abg.js

abg.js

33 ms

favicon

favicon

55 ms

nessie_icon_tiamat_white.png

nessie_icon_tiamat_white.png

22 ms

s

s

13 ms

googlelogo_color_112x36dp.png

googlelogo_color_112x36dp.png

57 ms

x_button_blue2.png

x_button_blue2.png

3 ms

jot

jot

112 ms

MdyApZkAHG2-UELdOwjNjjFZXSz-CGj4o1JtDR7aGgs.js

MdyApZkAHG2-UELdOwjNjjFZXSz-CGj4o1JtDR7aGgs.js

4 ms

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

39 ms

Accessibility Review

sansu.org accessibility score

77

Accessibility Issues

ARIA

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.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

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

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Best Practices

sansu.org best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

sansu.org SEO score

69

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

Links do not have descriptive text

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sansu.org 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 Sansu.org 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

sansu.org

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