Tools & Wizards About Us
koistudy.net screenshot

Report Summary

  • 65

    Performance

    Renders faster than
    79% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

koistudy.net

KOISTUDY

Page Load Speed

6.5 sec in total

First Response

2 sec

Resources Loaded

3.4 sec

Page Rendered

1 sec

koistudy.net screenshot

About Website

Click here to check amazing KOISTUDY content for Taiwan. Otherwise, check out these important facts you probably never knew about koistudy.net

Visit koistudy.net

Key Findings

We analyzed Koistudy.net page load time and found that the first response time was 2 sec and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

koistudy.net performance score

65

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value5.5 s

18/100

25%

SI (Speed Index)

Value5.7 s

51/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.059

98/100

15%

TTI (Time to Interactive)

Value4.5 s

82/100

10%

Network Requests Diagram

koistudy.net

2022 ms

default.css

590 ms

button.css

605 ms

layout.css

635 ms

layout@style.css

646 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that all of those requests were addressed to Koistudy.net and no external sources were called. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Koistudy.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 226.7 kB (63%)

Content Size

361.9 kB

After Optimization

135.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Koistudy.net main page is 361.9 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. Only 10% of websites need less resources to load. Javascripts take 129.0 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 91.6 kB

  • Original 106.2 kB
  • After minification 83.5 kB
  • After compression 14.6 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 22.7 kB, which is 21% 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 91.6 kB or 86% of the original size.

Image Optimization

-29%

Potential reduce by 30.1 kB

  • Original 104.0 kB
  • After minification 73.9 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, KOISTUDY needs image optimization as it can save up to 30.1 kB or 29% 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 87.1 kB

  • Original 129.0 kB
  • After minification 128.0 kB
  • After compression 41.9 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 87.1 kB or 68% of the original size.

CSS Optimization

-79%

Potential reduce by 17.9 kB

  • Original 22.8 kB
  • After minification 19.3 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. Koistudy.net needs all CSS files to be minified and compressed as it can save up to 17.9 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (68%)

Requests Now

28

After Optimization

9

  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KOISTUDY. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

koistudy.net

koistudy.net

2022 ms

default.css

default.css

590 ms

button.css

button.css

605 ms

layout.css

layout.css

635 ms

layout@style.css

layout@style.css

646 ms

style.css

style.css

436 ms

jquery.js

jquery.js

1443 ms

x.js

x.js

1014 ms

common.js

common.js

1085 ms

js_app.js

js_app.js

857 ms

xml_handler.js

xml_handler.js

1094 ms

xml_js_filter.js

xml_js_filter.js

1079 ms

a0c11ff59e1385cfaf608d201221625a.ko.compiled.js

a0c11ff59e1385cfaf608d201221625a.ko.compiled.js

218 ms

koistudybanner.png

koistudybanner.png

236 ms

buttonSmall.gif

buttonSmall.gif

198 ms

bgGnb.gif

bgGnb.gif

214 ms

vrGnb.gif

vrGnb.gif

199 ms

bgE1.gif

bgE1.gif

212 ms

ioi2016.png

ioi2016.png

227 ms

ioi2015.png

ioi2015.png

594 ms

koi2015_3.jpg

koi2015_3.jpg

993 ms

koi2015_2.jpg

koi2015_2.jpg

862 ms

2015.png

2015.png

636 ms

buttonTreeCollapse.gif

buttonTreeCollapse.gif

445 ms

lineTreeVr.gif

lineTreeVr.gif

449 ms

lineTreeHr.gif

lineTreeHr.gif

661 ms

iconTopicOn.gif

iconTopicOn.gif

664 ms

lineTreeLastHr.gif

lineTreeLastHr.gif

792 ms

loading.gif

loading.gif

848 ms

Accessibility Review

koistudy.net accessibility score

77

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.

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

koistudy.net best practices score

58

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

SEO Factors

koistudy.net SEO score

58

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

Language and Encoding

  • Language Detected

    KO

  • Language Claimed

    KO

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Koistudy.net can be misinterpreted by Google and other search engines. Our service has detected that Korean is used on the page, and it matches the claimed language. Our system also found out that Koistudy.net 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

koistudy.net

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