Tools & Wizards About Us
jkclass.cn screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 47

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

jkclass.cn

简快网校 - 专注心理学考研，圆你名校梦-考研人帮考研人，我的今天你的明天 - Powered By EduSoho

Page Load Speed

7.6 sec in total

First Response

784 ms

Resources Loaded

5.8 sec

Page Rendered

928 ms

jkclass.cn screenshot

About Website

Visit jkclass.cn now to see the best up-to-date Jkclass content and also check out these interesting facts you probably never knew about jkclass.cn

众学简快由来自全国多所985、211高校的精英研究生团队于2013年创办，2015年正式成立公司，是一家专注于考研线上辅导的在线教育机构，众学简快始终以"考研人帮考研人”为宗旨，以“互助共赢，让每一份耕耘都有收获”为理念，以备考、提分、服务为核心，8年来专注深耕心理学考研，做专业的心理学考研咨询，与心理学考研名师凉音强强联手，共同致力于为考生提供专业化、针对性、陪伴式、全方位的心理学考研咨询，是国...

Visit jkclass.cn

Key Findings

We analyzed Jkclass.cn page load time and found that the first response time was 784 ms and then it took 6.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

jkclass.cn performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.8 s

0/100

10%

LCP (Largest Contentful Paint)

Value30.7 s

0/100

25%

SI (Speed Index)

Value24.3 s

0/100

10%

TBT (Total Blocking Time)

Value11,070 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.041

99/100

15%

TTI (Time to Interactive)

Value35.5 s

0/100

10%

Network Requests Diagram

jkclass.cn

784 ms

www.jkclass.cn

854 ms

bootstrap.css

1374 ms

main.css

1863 ms

main-v2.css

1931 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 7% of them (3 requests) were addressed to the original Jkclass.cn, 80% (37 requests) were made to Sce1a9b5c5d71k-sb-qn.qiqiuyun.net and 9% (4 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (3.1 sec) relates to the external source Sce1a9b5c5d71k-sb-qn.qiqiuyun.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.5 MB (42%)

Content Size

3.6 MB

After Optimization

2.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jkclass.cn main page is 3.6 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. 60% of websites need less resources to load. Images take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 70.1 kB

  • Original 79.9 kB
  • After minification 58.0 kB
  • After compression 9.8 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 21.8 kB, which is 27% 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 70.1 kB or 88% of the original size.

Image Optimization

-4%

Potential reduce by 82.5 kB

  • Original 1.8 MB
  • After minification 1.8 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. Jkclass images are well optimized though.

JavaScript Optimization

-82%

Potential reduce by 189.7 kB

  • Original 230.6 kB
  • After minification 222.7 kB
  • After compression 40.9 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 189.7 kB or 82% of the original size.

CSS Optimization

-83%

Potential reduce by 1.2 MB

  • Original 1.4 MB
  • After minification 1.4 MB
  • After compression 247.6 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. Jkclass.cn needs all CSS files to be minified and compressed as it can save up to 1.2 MB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (37%)

Requests Now

43

After Optimization

27

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 43 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jkclass. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jkclass.cn

jkclass.cn

784 ms

www.jkclass.cn

www.jkclass.cn

854 ms

bootstrap.css

bootstrap.css

1374 ms

main.css

main.css

1863 ms

main-v2.css

main-v2.css

1931 ms

main-blue.css

main-blue.css

1207 ms

label_sm_90020.png

label_sm_90020.png

1258 ms

translator.min.js

translator.min.js

1002 ms

zh_CN.js

zh_CN.js

1633 ms

base.js

base.js

1781 ms

common.js

common.js

2577 ms

main.js

main.js

1792 ms

main.js

main.js

1842 ms

echo-js.js

echo-js.js

2144 ms

index.js

index.js

2146 ms

index.js

index.js

2146 ms

perfect-scrollbar.js

perfect-scrollbar.js

2143 ms

index.js

index.js

2147 ms

091743752da4919169.jpg

091743752da4919169.jpg

2300 ms

avatar.png

avatar.png

2261 ms

091743752da4919169.jpg

091743752da4919169.jpg

2365 ms

153651312dad974632.jpg

153651312dad974632.jpg

2299 ms

161523ba0ce4348643.jpg

161523ba0ce4348643.jpg

2300 ms

1614251e26b2780370.jpg

1614251e26b2780370.jpg

2458 ms

144120079c09004526.jpg

144120079c09004526.jpg

2542 ms

block_picture_1569460565.jpg

block_picture_1569460565.jpg

3019 ms

block_picture_1569460702.jpg

block_picture_1569460702.jpg

3020 ms

block_picture_1569460763.jpg

block_picture_1569460763.jpg

3020 ms

block_picture_1600681742.jpg

block_picture_1600681742.jpg

3022 ms

lazyload_course.png

lazyload_course.png

3033 ms

block_picture_1600681834.jpg

block_picture_1600681834.jpg

3077 ms

block_picture_1571040192.png

block_picture_1571040192.png

3076 ms

block_picture_1569460382.jpg

block_picture_1569460382.jpg

3076 ms

block_picture_1569472070.png

block_picture_1569472070.png

3075 ms

hm.js

hm.js

1748 ms

bar_qq.png

bar_qq.png

1023 ms

090306ac8cd3001528.jpg

090306ac8cd3001528.jpg

1023 ms

push.js

push.js

878 ms

es-icon.woff

es-icon.woff

1157 ms

hm.js

hm.js

1702 ms

sample

sample

457 ms

1817288b1b6d931547.jpg

1817288b1b6d931547.jpg

260 ms

1724320f1618552918.jpg

1724320f1618552918.jpg

337 ms

09124192761e179337.jpg

09124192761e179337.jpg

269 ms

hm.gif

hm.gif

315 ms

hm.gif

hm.gif

354 ms

Accessibility Review

jkclass.cn accessibility score

47

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

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.

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

jkclass.cn 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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

jkclass.cn SEO score

85

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

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

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

jkclass.cn

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