Tools & Wizards About Us
dav01.com screenshot

Report Summary

  • 36

    Performance

    Renders faster than
    55% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

dav01.com

DAV数字音视工程网_会议系统、指挥调度、演艺科技、智能楼宇等音视频工程信息行业门户

Page Load Speed

21.9 sec in total

First Response

642 ms

Resources Loaded

20.3 sec

Page Rendered

1 sec

dav01.com screenshot

About Website

Click here to check amazing Dav 01 content for China. Otherwise, check out these important facts you probably never knew about dav01.com

DAV数字音视工程网(dav01.com)是音视频工程行业权威门户网站,为您提供全面及时的项目,招标信息,厂商动态,工程技术资源和详尽准确的产品信息及相关厂家,经销商,工程商信息.包括大屏显示,信号处理,集中控制,数字会议,音频扩音,灯光舞台,公共广播,监控安防,摄录编播,远程音视涉及的会议系统,视频会议,多媒体会议,多功能会议,指挥中心,指挥调度,投影机,虚拟仿真,大屏幕,监控,公共广播,项目招

Visit dav01.com

Key Findings

We analyzed Dav01.com page load time and found that the first response time was 642 ms and then it took 21.3 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

dav01.com performance score

36

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.2 s

8/100

10%

LCP (Largest Contentful Paint)

Value40.7 s

0/100

25%

SI (Speed Index)

Value9.4 s

12/100

10%

TBT (Total Blocking Time)

Value430 ms

64/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value30.6 s

0/100

10%

Network Requests Diagram

dav01.com

642 ms

www.dav01.com

1467 ms

newhome.min.css

820 ms

telf.png

613 ms

davinfo_227432_1638504370057_407765528.gif

791 ms

Our browser made a total of 259 requests to load all elements on the main page. We found that 1% of them (3 requests) were addressed to the original Dav01.com, 90% (234 requests) were made to Img.dav01.com and 7% (18 requests) were made to Static.dav01.com. The less responsive or slowest element that took the longest time to load (10.1 sec) relates to the external source Img.dav01.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 976.1 kB (29%)

Content Size

3.3 MB

After Optimization

2.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dav01.com main page is 3.3 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 2.3 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 836.5 kB

  • Original 937.2 kB
  • After minification 847.9 kB
  • After compression 100.6 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 836.5 kB or 89% of the original size.

Image Optimization

-5%

Potential reduce by 119.7 kB

  • Original 2.3 MB
  • After minification 2.2 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. Dav 01 images are well optimized though.

JavaScript Optimization

-13%

Potential reduce by 13.2 kB

  • Original 100.7 kB
  • After minification 100.7 kB
  • After compression 87.5 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 13.2 kB or 13% of the original size.

CSS Optimization

-19%

Potential reduce by 6.6 kB

  • Original 35.6 kB
  • After minification 35.6 kB
  • After compression 29.0 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. Dav01.com needs all CSS files to be minified and compressed as it can save up to 6.6 kB or 19% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (1%)

Requests Now

256

After Optimization

253

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 256 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dav 01. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

dav01.com

dav01.com

642 ms

www.dav01.com

www.dav01.com

1467 ms

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820 ms

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1184 ms

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228 ms

Accessibility Review

dav01.com accessibility score

74

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

Image elements do not have [alt] attributes

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

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

dav01.com best practices score

58

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

High

Page has valid source maps

SEO Factors

dav01.com SEO score

82

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

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 Dav01.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 Dav01.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

dav01.com

Open Graph description is not detected on the main page of Dav 01. 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: