Report Summary

  • 36

    Performance

    Renders faster than
    56% of other websites

  • 48

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

b2b.21csp.com.cn

安防产品中心 - 中国安全防范产品行业协会

Page Load Speed

12.7 sec in total

First Response

1.3 sec

Resources Loaded

11 sec

Page Rendered

402 ms

b2b.21csp.com.cn screenshot

About Website

Welcome to b2b.21csp.com.cn homepage info - get ready to check B 2 21 Csp best content for China right away, or after learning these important things about b2b.21csp.com.cn

产品中心频道依托于中国安防行业协会,为企业提供专业的安防行业电子商务平台,供应视频监控、防盗报警、门禁识别、楼宇对讲、智能交通等各类安防产品。我们不仅提供最新的安防技术、产品动态,更提供最专业优质的服务。

Visit b2b.21csp.com.cn

Key Findings

We analyzed B2b.21csp.com.cn page load time and found that the first response time was 1.3 sec and then it took 11.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

b2b.21csp.com.cn performance score

36

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

75/100

10%

LCP (Largest Contentful Paint)

Value4.4 s

39/100

25%

SI (Speed Index)

Value7.4 s

28/100

10%

TBT (Total Blocking Time)

Value3,620 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.079

94/100

15%

TTI (Time to Interactive)

Value11.2 s

20/100

10%

Network Requests Diagram

b2b.21csp.com.cn

1321 ms

css.css

504 ms

index.css

510 ms

jQuery.js

1275 ms

jquery.slideBox.min.js

513 ms

Our browser made a total of 100 requests to load all elements on the main page. We found that 82% of them (82 requests) were addressed to the original B2b.21csp.com.cn, 10% (10 requests) were made to 21csp.com.cn and 1% (1 request) were made to S15.cnzz.com. The less responsive or slowest element that took the longest time to load (6.2 sec) belongs to the original domain B2b.21csp.com.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 326.9 kB (22%)

Content Size

1.5 MB

After Optimization

1.1 MB

In fact, the total size of B2b.21csp.com.cn main page is 1.5 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. 35% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 88.5 kB

  • Original 105.0 kB
  • After minification 93.3 kB
  • After compression 16.5 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 11.8 kB, which is 11% 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 88.5 kB or 84% of the original size.

Image Optimization

-12%

Potential reduce by 147.3 kB

  • Original 1.2 MB
  • After minification 1.1 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. Obviously, B 2 21 Csp needs image optimization as it can save up to 147.3 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-65%

Potential reduce by 79.8 kB

  • Original 121.9 kB
  • After minification 118.5 kB
  • After compression 42.1 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 79.8 kB or 65% of the original size.

CSS Optimization

-76%

Potential reduce by 11.4 kB

  • Original 14.8 kB
  • After minification 12.5 kB
  • After compression 3.5 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. B2b.21csp.com.cn needs all CSS files to be minified and compressed as it can save up to 11.4 kB or 76% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (4%)

Requests Now

98

After Optimization

94

The browser has sent 98 CSS, Javascripts, AJAX and image requests in order to completely render the main page of B 2 21 Csp. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

b2b.21csp.com.cn accessibility score

48

Accessibility Issues

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

Tables and lists

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

Impact

Issue

High

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

Best Practices

b2b.21csp.com.cn best practices score

67

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

SEO Factors

b2b.21csp.com.cn SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 B2b.21csp.com.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 B2b.21csp.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

Open Graph description is not detected on the main page of B 2 21 Csp. 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: