Tools & Wizards About Us
dav01.com screenshot

Report Summary

  • 41

    Performance

    Renders faster than
    60% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 90

    SEO

    Google-friendlier than
    68% 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

107.9 sec in total

First Response

1.3 sec

Resources Loaded

104.9 sec

Page Rendered

1.7 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 1.3 sec and then it took 106.6 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. Unfortunately, there were 44 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

dav01.com performance score

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value16.0 s

0/100

25%

SI (Speed Index)

Value9.2 s

13/100

10%

TBT (Total Blocking Time)

Value240 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0.124

83/100

15%

TTI (Time to Interactive)

Value15.1 s

7/100

10%

Network Requests Diagram

dav01.com

1292 ms

www.dav01.com

5158 ms

public.css

2167 ms

davinfo_68442_1459993272163_351600659.png

19614 ms

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5290 ms

Our browser made a total of 368 requests to load all elements on the main page. We found that 1% of them (2 requests) were addressed to the original Dav01.com, 72% (264 requests) were made to Img.dav01.com and 9% (34 requests) were made to Static.dav01.com. The less responsive or slowest element that took the longest time to load (20.5 sec) relates to the external source Img.dav01.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 556.1 kB (20%)

Content Size

2.7 MB

After Optimization

2.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dav01.com main page is 2.7 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. 55% of websites need less resources to load. Images take 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 167.7 kB

  • Original 204.9 kB
  • After minification 194.9 kB
  • After compression 37.2 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 167.7 kB or 82% of the original size.

Image Optimization

-8%

Potential reduce by 188.0 kB

  • Original 2.2 MB
  • After minification 2.0 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

-65%

Potential reduce by 151.5 kB

  • Original 231.5 kB
  • After minification 227.2 kB
  • After compression 80.1 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 151.5 kB or 65% of the original size.

CSS Optimization

-81%

Potential reduce by 49.0 kB

  • Original 60.8 kB
  • After minification 59.0 kB
  • After compression 11.8 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 49.0 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (7%)

Requests Now

321

After Optimization

297

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 321 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 12 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dav01.com

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5158 ms

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14740 ms

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15155 ms

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12532 ms

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12623 ms

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12590 ms

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11765 ms

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13175 ms

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11353 ms

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10030 ms

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8735 ms

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11886 ms

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8486 ms

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10437 ms

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7981 ms

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8466 ms

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7118 ms

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8289 ms

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6654 ms

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6945 ms

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6716 ms

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7538 ms

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9001 ms

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6591 ms

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6539 ms

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6492 ms

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6784 ms

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6927 ms

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5806 ms

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6728 ms

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7627 ms

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6727 ms

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6711 ms

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8854 ms

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9082 ms

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7679 ms

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6552 ms

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8042 ms

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6813 ms

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6864 ms

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7071 ms

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7220 ms

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7208 ms

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7303 ms

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7425 ms

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7120 ms

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7188 ms

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8273 ms

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10883 ms

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6749 ms

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6504 ms

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6320 ms

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6950 ms

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6450 ms

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5784 ms

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5827 ms

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5784 ms

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5778 ms

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5879 ms

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7478 ms

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5642 ms

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5662 ms

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8252 ms

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7138 ms

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5091 ms

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5204 ms

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5107 ms

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4997 ms

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5114 ms

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6566 ms

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15444 ms

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7971 ms

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5630 ms

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7080 ms

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5918 ms

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5708 ms

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6369 ms

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10243 ms

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5877 ms

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7502 ms

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6514 ms

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8032 ms

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7632 ms

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6733 ms

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7198 ms

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9088 ms

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7222 ms

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7950 ms

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7537 ms

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7905 ms

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7696 ms

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8643 ms

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10486 ms

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8112 ms

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8803 ms

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9109 ms

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8654 ms

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8096 ms

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8755 ms

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9397 ms

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9631 ms

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8837 ms

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7918 ms

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9167 ms

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7937 ms

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8649 ms

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8463 ms

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10421 ms

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8717 ms

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8128 ms

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8409 ms

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7833 ms

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7855 ms

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9076 ms

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7296 ms

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7184 ms

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7199 ms

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6939 ms

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7955 ms

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7045 ms

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6730 ms

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6467 ms

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6646 ms

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9249 ms

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9044 ms

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11806 ms

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10238 ms

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12766 ms

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7954 ms

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19706 ms

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9637 ms

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16380 ms

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19815 ms

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12042 ms

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10461 ms

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11232 ms

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12847 ms

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12679 ms

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12632 ms

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19995 ms

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13228 ms

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15436 ms

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18570 ms

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17132 ms

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17020 ms

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19707 ms

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19630 ms

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18812 ms

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19325 ms

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19758 ms

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18884 ms

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20482 ms

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13762 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

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

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

90

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

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: