Tools & Wizards About Us

Report Summary

  • 45

    Performance

    Renders faster than
    64% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

dzsc.com

维库电子市场网 - 电子元器件采购网上平台 Dzsc.com

Page Load Speed

18.9 sec in total

First Response

729 ms

Resources Loaded

17.9 sec

Page Rendered

299 ms

About Website

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

维库电子市场网(www.dzsc.com)是国内外知名的电子元器件采购网、电子元件配单网、IC交易平台。100万注册会员中42.8万电子工程师和57.3万终端工厂。上亿条电子元器件现货、IC芯片库存信息，500多万IC PDF资料。维库电子市场网立足于电子产品信息服务业，为电子行业生产制造商、销售商、广大的电子产品消费者和爱好者以及网络用户提供专业化的网络资讯服务和电子商务服务。

Visit dzsc.com

Key Findings

We analyzed Dzsc.com page load time and found that the first response time was 729 ms and then it took 18.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

dzsc.com performance score

45

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.9 s

4/100

10%

LCP (Largest Contentful Paint)

Value13.3 s

0/100

25%

SI (Speed Index)

Value9.0 s

14/100

10%

TBT (Total Blocking Time)

Value210 ms

89/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.2 s

15/100

10%

Network Requests Diagram

dzsc.com

729 ms

www.dzsc.com

5204 ms

base.css

1098 ms

top.css

1102 ms

index.css

1136 ms

Our browser made a total of 223 requests to load all elements on the main page. We found that 10% of them (22 requests) were addressed to the original Dzsc.com, 57% (127 requests) were made to File3.dzsc.com and 22% (48 requests) were made to Img3.dzsc.com. The less responsive or slowest element that took the longest time to load (9.9 sec) relates to the external source File3.dzsc.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 538.5 kB (23%)

Content Size

2.3 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dzsc.com main page is 2.3 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. 65% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 361.5 kB

  • Original 414.6 kB
  • After minification 320.3 kB
  • After compression 53.1 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 94.3 kB, which is 23% 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 361.5 kB or 87% of the original size.

Image Optimization

-9%

Potential reduce by 143.2 kB

  • Original 1.7 MB
  • After minification 1.5 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. Dzsc images are well optimized though.

JavaScript Optimization

-16%

Potential reduce by 30.7 kB

  • Original 192.3 kB
  • After minification 186.1 kB
  • After compression 161.6 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 30.7 kB or 16% of the original size.

CSS Optimization

-21%

Potential reduce by 3.1 kB

  • Original 15.0 kB
  • After minification 14.9 kB
  • After compression 11.9 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. Dzsc.com needs all CSS files to be minified and compressed as it can save up to 3.1 kB or 21% of the original size.

Requests Breakdown

Number of requests can be reduced by 38 (17%)

Requests Now

221

After Optimization

183

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 221 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dzsc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

dzsc.com accessibility score

55

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.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

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

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

dzsc.com best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

dzsc.com SEO score

86

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

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 uses legible font sizes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dzsc.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 Dzsc.com main page’s claimed encoding is gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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