Tools & Wizards About Us

Report Summary

  • 69

    Performance

    Renders faster than
    80% of other websites

  • 53

    Accessibility

    Visual factors better than
    that of 22% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

chinajdsj.com

世家鉴藏 - 古董鉴定 - 古董古玩文物鉴定与藏品交易平台

Page Load Speed

8 sec in total

First Response

1.8 sec

Resources Loaded

5.9 sec

Page Rendered

385 ms

About Website

Visit chinajdsj.com now to see the best up-to-date Chinajdsj content and also check out these interesting facts you probably never knew about chinajdsj.com

世家鉴藏是经国家注册的文物鉴定、古董鉴定、古玩鉴定、文物修复、培训权威性鉴定与交易平台，由央视《鉴宝》、《寻宝》、北京电视台《天下收藏》等栏目组文物鉴定专家、故宫博物院、首都博物馆、中国国家博物馆、中国考古研究所、国家文物鉴定委员会委员等数十位国家级权威文物鉴定专家组成，成立世家文物鉴定委员会，面向国内外提供专业的古董鉴定、文物修复、古玩交易、书画精裱、文化交流、艺术品投资咨询、培训咨询等服务

Visit chinajdsj.com

Key Findings

We analyzed Chinajdsj.com page load time and found that the first response time was 1.8 sec and then it took 6.3 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

chinajdsj.com performance score

69

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

31/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

44/100

25%

SI (Speed Index)

Value8.8 s

16/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value4.4 s

84/100

10%

Network Requests Diagram

chinajdsj.com

1770 ms

index.css

703 ms

base.css

465 ms

global.css

468 ms

form.css

468 ms

Our browser made a total of 63 requests to load all elements on the main page. We found that 63% of them (40 requests) were addressed to the original Chinajdsj.com, 27% (17 requests) were made to Img.chinajdsj.com and 3% (2 requests) were made to Wpa.qq.com. The less responsive or slowest element that took the longest time to load (2.8 sec) relates to the external source Img.chinajdsj.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 268.0 kB (7%)

Content Size

3.6 MB

After Optimization

3.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chinajdsj.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 3.5 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 57.8 kB

  • Original 71.9 kB
  • After minification 54.3 kB
  • After compression 14.1 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 17.6 kB, which is 24% 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 57.8 kB or 80% of the original size.

Image Optimization

-5%

Potential reduce by 189.8 kB

  • Original 3.5 MB
  • After minification 3.3 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. Chinajdsj images are well optimized though.

JavaScript Optimization

-22%

Potential reduce by 18.5 kB

  • Original 84.2 kB
  • After minification 84.2 kB
  • After compression 65.7 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 18.5 kB or 22% of the original size.

CSS Optimization

-14%

Potential reduce by 1.9 kB

  • Original 13.9 kB
  • After minification 13.4 kB
  • After compression 12.0 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. Chinajdsj.com needs all CSS files to be minified and compressed as it can save up to 1.9 kB or 14% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (23%)

Requests Now

60

After Optimization

46

  • Images
  • JavaScript
  • CSS

The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chinajdsj. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

chinajdsj.com accessibility score

53

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.

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 [lang] attribute

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

chinajdsj.com best practices score

50

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

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

chinajdsj.com SEO score

67

Search Engine Optimization Advices

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

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 Chinajdsj.com 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 Chinajdsj.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 Chinajdsj. 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: