10.2 sec in total
746 ms
9.2 sec
258 ms
Visit dfvent.com now to see the best up-to-date Dfvent content and also check out these interesting facts you probably never knew about dfvent.com
佛山市大风通风科技有限公司
Visit dfvent.comWe analyzed Dfvent.com page load time and found that the first response time was 746 ms and then it took 9.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
dfvent.com performance score
name
value
score
weighting
Value4.4 s
16/100
10%
Value30.7 s
0/100
25%
Value15.7 s
0/100
10%
Value890 ms
32/100
30%
Value0.875
3/100
15%
Value8.8 s
36/100
10%
746 ms
882 ms
1752 ms
249 ms
255 ms
Our browser made a total of 117 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Dfvent.com, 98% (115 requests) were made to Nwzimg.wezhan.cn. The less responsive or slowest element that took the longest time to load (3.3 sec) relates to the external source Nwzimg.wezhan.cn.
Page size can be reduced by 495.6 kB (30%)
1.7 MB
1.2 MB
In fact, the total size of Dfvent.com main page is 1.7 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. 65% of websites need less resources to load. Images take 984.2 kB which makes up the majority of the site volume.
Potential reduce by 204.7 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 26.4 kB, which is 12% 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 204.7 kB or 89% of the original size.
Potential reduce by 237.9 kB
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, Dfvent needs image optimization as it can save up to 237.9 kB or 24% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 43.8 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 43.8 kB or 11% of the original size.
Potential reduce by 9.2 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. Dfvent.com needs all CSS files to be minified and compressed as it can save up to 9.2 kB or 23% of the original size.
Number of requests can be reduced by 31 (27%)
115
84
The browser has sent 115 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dfvent. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.
dfvent.com
746 ms
30536_zh-cn.html.Head.js
882 ms
30536_zh-cn.html.Body.js
1752 ms
pcstyle.css
249 ms
reset.css
255 ms
iconfont.css
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pager.css
396 ms
hover-effects.css
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antChain.css
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video-js.min.css
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jquery-3.6.3.min.js
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jqPaginator.min.js
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slideshow.js
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dfvent.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
<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
Image elements do not have [alt] attributes
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
dfvent.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
dfvent.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
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
Document uses legible font sizes
Tap targets are not sized appropriately
ZH
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dfvent.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 Dfvent.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.
dfvent.com
Open Graph description is not detected on the main page of Dfvent. 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: