Tools & Wizards About Us
jamsune.com screenshot

Report Summary

  • 59

    Performance

    Renders faster than
    74% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

jamsune.com

잠수네 커가는 아이들

Page Load Speed

10.4 sec in total

First Response

615 ms

Resources Loaded

9.7 sec

Page Rendered

101 ms

jamsune.com screenshot

About Website

Visit jamsune.com now to see the best up-to-date Jamsune content and also check out these interesting facts you probably never knew about jamsune.com

유아~초중고 영어교육, 수학교육, 한글책 추천/단계별 목록, 영어책 추천/단계별 목록, 자기주도학습, 영어테스트/수학테스트. 초등연산/중등연산

Visit jamsune.com

Key Findings

We analyzed Jamsune.com page load time and found that the first response time was 615 ms and then it took 9.8 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

jamsune.com performance score

59

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value5.2 s

23/100

25%

SI (Speed Index)

Value12.2 s

3/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.071

96/100

15%

TTI (Time to Interactive)

Value5.8 s

67/100

10%

Network Requests Diagram

jamsune.com

615 ms

www.jamsune.com

902 ms

intro.html

662 ms

main.css

593 ms

common.css

2162 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that 23% of them (14 requests) were addressed to the original Jamsune.com, 60% (36 requests) were made to Images.jamsune.com and 10% (6 requests) were made to 0. The less responsive or slowest element that took the longest time to load (3 sec) belongs to the original domain Jamsune.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (45%)

Content Size

2.4 MB

After Optimization

1.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jamsune.com main page is 2.4 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. 30% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-49%

Potential reduce by 652 B

  • Original 1.3 kB
  • After minification 1.3 kB
  • After compression 666 B

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 652 B or 49% of the original size.

Image Optimization

-18%

Potential reduce by 261.8 kB

  • Original 1.5 MB
  • After minification 1.2 MB

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, Jamsune needs image optimization as it can save up to 261.8 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-68%

Potential reduce by 105.7 kB

  • Original 155.5 kB
  • After minification 150.1 kB
  • After compression 49.8 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 105.7 kB or 68% of the original size.

CSS Optimization

-88%

Potential reduce by 725.4 kB

  • Original 822.6 kB
  • After minification 746.6 kB
  • After compression 97.2 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. Jamsune.com needs all CSS files to be minified and compressed as it can save up to 725.4 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (23%)

Requests Now

52

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jamsune. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jamsune.com

jamsune.com

615 ms

www.jamsune.com

www.jamsune.com

902 ms

intro.html

intro.html

662 ms

main.css

main.css

593 ms

common.css

common.css

2162 ms

setup.css

setup.css

2966 ms

jamsune.common.const.js.php

jamsune.common.const.js.php

841 ms

common.function.js

common.function.js

1009 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

1400 ms

iwtObject-0.9.2.js

iwtObject-0.9.2.js

1071 ms

iwtFormValidator-1.0.2.js

iwtFormValidator-1.0.2.js

1617 ms

js

js

77 ms

js

js

143 ms

jquery.loginProgram_1.0.4.js

jquery.loginProgram_1.0.4.js

815 ms

cookies.js

cookies.js

889 ms

kopubbatang.css

kopubbatang.css

50 ms

maru-buri.css

maru-buri.css

1401 ms

img_01.png

img_01.png

2161 ms

playbtn_off.png

playbtn_off.png

201 ms

left_sub1.png

left_sub1.png

1131 ms

left_menu01.png

left_menu01.png

1147 ms

left_menu02.png

left_menu02.png

1151 ms

left_sub2.png

left_sub2.png

1150 ms

left_menu03.png

left_menu03.png

1151 ms

left_menu04.png

left_menu04.png

1327 ms

left_menu05.png

left_menu05.png

1360 ms

title_firstguide.gif

title_firstguide.gif

1349 ms

videoguide_img2.png

videoguide_img2.png

1369 ms

playbtn_off.png

playbtn_off.png

1351 ms

guide_pic_23.png

guide_pic_23.png

1528 ms

guide_pic_24.png

guide_pic_24.png

1552 ms

q1.png

q1.png

2029 ms

q2.png

q2.png

1973 ms

q4.png

q4.png

1806 ms

q5.png

q5.png

2146 ms

q6.png

q6.png

2404 ms

q3.png

q3.png

2125 ms

logo.png

logo.png

2174 ms

btn_login.png

btn_login.png

2229 ms

btn_setup.png

btn_setup.png

2331 ms

txt_01.png

txt_01.png

2342 ms

icon_bar.png

icon_bar.png

2350 ms

txt_02.png

txt_02.png

2372 ms

notice_menu_01.png

notice_menu_01.png

2430 ms

notice_menu_02.png

notice_menu_02.png

2531 ms

notice_menu_03.png

notice_menu_03.png

2540 ms

jamsune_book2.png

jamsune_book2.png

2597 ms

bottom_txt1.png

bottom_txt1.png

2577 ms

bottom_txt2.png

bottom_txt2.png

2603 ms

roading.gif

roading.gif

2640 ms

roading_txt.png

roading_txt.png

2731 ms

20210323_01.png

20210323_01.png

2736 ms

20210323_02.png

20210323_02.png

2796 ms

capslock_bg.png

capslock_bg.png

2725 ms

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8 ms

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0 ms

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0 ms

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1 ms

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1 ms

Accessibility Review

jamsune.com accessibility score

59

Accessibility Issues

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.

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

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

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

jamsune.com 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

jamsune.com SEO score

77

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Page is blocked from indexing

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

    KO

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jamsune.com can be misinterpreted by Google and other search engines. Our service has detected that Korean 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 Jamsune.com 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

jamsune.com

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