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name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

12/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value260 ms

83/100

30%

CLS (Cumulative Layout Shift)

Value0.052

98/100

15%

TTI (Time to Interactive)

Value7.7 s

46/100

10%

designerbooks.com.cn

4968 ms

common.css

10303 ms

index.css

9176 ms

common.js

2428 ms

tab.js

1056 ms

Our browser made a total of 89 requests to load all elements on the main page. We found that 76% of them (68 requests) were addressed to the original Designerbooks.com.cn, 10% (9 requests) were made to Www13.53kf.com and 3% (3 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (19.7 sec) belongs to the original domain Designerbooks.com.cn.

Content Size

264.9 kB

After Optimization

130.7 kB

In fact, the total size of Designerbooks.com.cn main page is 264.9 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. 25% of websites need less resources to load. HTML takes 84.4 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 69.4 kB

Original 84.4 kB
After minification 70.5 kB
After compression 15.0 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 13.9 kB, which is 17% 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 69.4 kB or 82% of the original size.

Image Optimization

-21%

Potential reduce by 16.5 kB

Original 79.5 kB
After minification 63.0 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, Designerbooks needs image optimization as it can save up to 16.5 kB or 21% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-19%

Potential reduce by 10.3 kB

Original 54.9 kB
After minification 50.9 kB
After compression 44.6 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 10.3 kB or 19% of the original size.

CSS Optimization

-82%

Potential reduce by 38.0 kB

Original 46.1 kB
After minification 38.9 kB
After compression 8.2 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. Designerbooks.com.cn needs all CSS files to be minified and compressed as it can save up to 38.0 kB or 82% of the original size.

Requests Now

After Optimization

The browser has sent 85 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Designerbooks. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 4 to 1 for CSS 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 interpretation of your content by users in different locales.

High

<html> element does not have a valid value for its [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

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

Serves images with low resolution

Low

Detected JavaScript libraries

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

High

Document uses plugins

Language and Encoding

Language Detected

ZH
Language Claimed

UT
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Designerbooks.com.cn 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 language. Our system also found out that Designerbooks.com.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

designerbooks.com.cn

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

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

designerbooks.com.cn

common.css

index.css

common.js

tab.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

designerbooks.com.cn

common.css

index.css

common.js

tab.js

jquery.pack.js

jquery.timers.js

jquery.cookie.min.js

std_stranjf.js

PackageShoppingCart.aspx

kf.php

CounterLink.aspx

qq.css

ServiceQQ.js

kf.php

logo.png

ad_message.png

contact_tel.jpg

search_b.gif

sub_email.png

book_new.png

book_sale.png

book_publish.png

top.jpg

banner_sale.jpg

004.jpg

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