Access yiban.cn. 易班网

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

20/100

25%

SI (Speed Index)

Value18.8 s

0/100

10%

TBT (Total Blocking Time)

Value180 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.844

4/100

15%

TTI (Time to Interactive)

Value11.3 s

19/100

10%

www.yiban.cn

1406 ms

index.css

1323 ms

sea.js

276 ms

main.js

563 ms

logo-lg.png

296 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 97% of them (67 requests) were addressed to the original Yiban.cn, 1% (1 request) were made to S4.cnzz.com and 1% (1 request) were made to Oz.cnzz.com. The less responsive or slowest element that took the longest time to load (6.7 sec) belongs to the original domain Yiban.cn.

Content Size

993.9 kB

After Optimization

524.1 kB

In fact, the total size of Yiban.cn main page is 993.9 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. 35% of websites need less resources to load. Images take 471.6 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 87.7 kB

Original 102.9 kB
After minification 71.8 kB
After compression 15.2 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 31.0 kB, which is 30% 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 87.7 kB or 85% of the original size.

Image Optimization

-14%

Potential reduce by 64.5 kB

Original 471.6 kB
After minification 407.1 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, Yiban needs image optimization as it can save up to 64.5 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-73%

Potential reduce by 216.7 kB

Original 295.7 kB
After minification 223.5 kB
After compression 79.1 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 216.7 kB or 73% of the original size.

CSS Optimization

-82%

Potential reduce by 100.9 kB

Original 123.7 kB
After minification 123.0 kB
After compression 22.8 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. Yiban.cn needs all CSS files to be minified and compressed as it can save up to 100.9 kB or 82% of the original size.

Requests Now

After Optimization

The browser has sent 66 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Yiban. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 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 keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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 semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

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

N/A
Encoding

UTF-8

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

yiban.cn

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

易班网

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

www.yiban.cn

index.css

sea.js

main.js

logo-lg.png

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

www.yiban.cn

index.css

sea.js

main.js

logo-lg.png

icon.png

160407180107109779.jpg

151103102720767158.jpg

150204155437412893.jpg

150204155329889630.jpg

150206125142635215.jpg

160223135223345433.jpg

160223134057222415.jpg

151111152120438902.jpg

151111150731672666.png

151111143929316332.jpg

150701113628480816.jpg

151207143341755725.jpg

150612103118944250.jpg

loading.gif

12377.png

jubao.png

jubao2.png

brand.png

sidebar.png

getLogin

seajs-css.js

seajs-text.js

HelveticaNeueLTPro-MdEx.ttf

yiban.woff

index.js

z_stat.php

jquery.js

unslider.js

jquery.lazyload-min.js

yiban.js

popup.js

overlay.js

ie.js

kick-ie.js

url.js

message.js

overlay.js