Access zhongkao.com. 北京学而思网络科技有限公司

name

value

score

weighting

FCP (First Contentful Paint)

Value9.1 s

0/100

10%

LCP (Largest Contentful Paint)

Value15.0 s

0/100

25%

SI (Speed Index)

Value17.5 s

0/100

10%

TBT (Total Blocking Time)

Value2,940 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.013

100/100

15%

TTI (Time to Interactive)

Value17.7 s

4/100

10%

zhongkao.com

1934 ms

www.zhongkao.com

7801 ms

pczk_2016.css

6978 ms

jquery1.7.1.js

8996 ms

common.js

8728 ms

Our browser made a total of 134 requests to load all elements on the main page. We found that 1% of them (2 requests) were addressed to the original Zhongkao.com, 47% (63 requests) were made to Img.eduuu.com and 30% (40 requests) were made to Files.eduuu.com. The less responsive or slowest element that took the longest time to load (20.5 sec) relates to the external source Files.eduuu.com.

Content Size

2.6 MB

After Optimization

1.5 MB

In fact, the total size of Zhongkao.com main page is 2.6 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. 40% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 434.6 kB

Original 521.0 kB
After minification 441.9 kB
After compression 86.4 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 79.1 kB, which is 15% 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 434.6 kB or 83% of the original size.

Image Optimization

-8%

Potential reduce by 105.7 kB

Original 1.3 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. Zhongkao images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 442.2 kB

Original 621.0 kB
After minification 594.3 kB
After compression 178.8 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 442.2 kB or 71% of the original size.

CSS Optimization

-83%

Potential reduce by 105.8 kB

Original 127.7 kB
After minification 100.0 kB
After compression 21.9 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. Zhongkao.com needs all CSS files to be minified and compressed as it can save up to 105.8 kB or 83% of the original size.

Requests Now

After Optimization

The browser has sent 96 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zhongkao. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

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

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

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

These items highlight common accessibility best practices.

High

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

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

High

Displays images with incorrect aspect ratio

Low

Detected JavaScript libraries

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

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

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

ZH
Language Claimed

EN
Encoding

GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zhongkao.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it does not match the claimed English language. Our system also found out that Zhongkao.com main page’s claimed encoding is gb2312. 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

zhongkao.com

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

Report Summary

Performance

Accessibility

Best Practices

SEO

北京学而思网络科技有限公司

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)

Network Requests Diagram

zhongkao.com

www.zhongkao.com

pczk_2016.css

jquery1.7.1.js

common.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

zhongkao.com

www.zhongkao.com

pczk_2016.css

jquery1.7.1.js

common.js

jquery.SuperSlide.js

iscroll.js

raphael-min.js

map.js

map-min.js

topMenu.js

subcity_zk.js

s

s

s

s

s

s

public_index_zkservice.js

public_index_service.js

ggc.js

searchapi.js

public_pczhongkao.js

public_index_call.js

js_index_jx.js

public_topNav_tt.css

avatar_small.jpg

login.js

nav_btn_srh.gif

logo.jpg

150918_4edb1c9e6da36.jpg

logo.jpg

140913_551a3a09b74a6.jpg

181457_5540af21de162.jpg

151355_55f12db388d56.jpg

180656_56e147405b528.jpg

192814_55757c4e4670e.gif

192814_55757c4e6ffbc.gif

101552_55764c5860793.gif

192814_55757c4ed1649.gif

192354_56b091cad048d.jpg

192423_56b091e74267d.jpg

192408_56b091d842b66.jpg