Tools & Wizards About Us

Report Summary

  • 56

    Performance

    Renders faster than
    72% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

kongfz.com

【孔夫子旧书网】网上买书：图书_书籍_古籍_二手书，网上卖书：网上书店_古旧书拍卖，国内专业的古旧书交易平台

Page Load Speed

25 sec in total

First Response

499 ms

Resources Loaded

23.6 sec

Page Rendered

845 ms

About Website

Welcome to kongfz.com homepage info - get ready to check Kongfz best content for China right away, or after learning these important things about kongfz.com

孔夫子旧书网是国内专业的古旧书交易平台，汇集全国各地13000家网上书店，50000家书摊，展示多达9000万种书籍；大量极具收藏价值的古旧珍本（明清、民国古籍善本，珍品期刊，名人墨迹，民国珍本，绝版书等）在孔网展示与交易，吸引了大量的学者、研究人员和藏书人长时间在线关注并参与。找图书网站、在网上买书、开网上书店卖书，首选孔夫子旧书网。

Visit kongfz.com

Key Findings

We analyzed Kongfz.com page load time and found that the first response time was 499 ms and then it took 24.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

kongfz.com performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

12/100

10%

LCP (Largest Contentful Paint)

Value5.6 s

18/100

25%

SI (Speed Index)

Value10.4 s

8/100

10%

TBT (Total Blocking Time)

Value90 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.042

99/100

15%

TTI (Time to Interactive)

Value7.7 s

45/100

10%

Network Requests Diagram

kongfz.com

499 ms

www.kongfz.com

999 ms

www.kongfz.com

1654 ms

Index_index_index_page-88e6a36bbd.css

684 ms

track.js

1168 ms

Our browser made a total of 88 requests to load all elements on the main page. We found that 73% of them (64 requests) were addressed to the original Kongfz.com, 14% (12 requests) were made to Booklibimg.kfzimg.com and 5% (4 requests) were made to Img0.kfzimg.com. The less responsive or slowest element that took the longest time to load (19.9 sec) relates to the external source Zz.bdstatic.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 483.4 kB (13%)

Content Size

3.6 MB

After Optimization

3.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kongfz.com 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. 50% of websites need less resources to load. Images take 3.0 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 325.4 kB

  • Original 377.8 kB
  • After minification 294.8 kB
  • After compression 52.4 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 83.0 kB, which is 22% 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 325.4 kB or 86% of the original size.

Image Optimization

-5%

Potential reduce by 157.7 kB

  • Original 3.0 MB
  • After minification 2.8 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. Kongfz images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 248 B

  • Original 186.1 kB
  • After minification 186.1 kB
  • After compression 185.8 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 56 B

  • Original 16.8 kB
  • After minification 16.8 kB
  • After compression 16.7 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. Kongfz.com has all CSS files already compressed.

Requests Breakdown

We found no issues to fix!

Requests Now

83

After Optimization

83

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 83 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kongfz. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

kongfz.com accessibility score

81

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

Links do not have a discernible name

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

kongfz.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

kongfz.com SEO score

91

Search Engine Optimization Advices

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    ZH

  • Encoding

    UTF-8

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

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