39.7 sec in total
6.7 sec
32.8 sec
160 ms
Visit ledman.cn now to see the best up-to-date Ledman content and also check out these interesting facts you probably never knew about ledman.cn
深圳雷曼光电科技股份有限公司(证券简称:雷曼光电,证券代码:300162)成立于2004年,是全球领先的LED超高清显示专家,全球COB新型显示技术领军企业,8K超高清LED巨幕显示领导者,中国第一家LED显示屏高科技上市公司,中国航天事业战略合作伙伴,2022北京冬奥会开幕式冰雪五环出品商。
Visit ledman.cnWe analyzed Ledman.cn page load time and found that the first response time was 6.7 sec and then it took 33 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 34 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.
ledman.cn performance score
name
value
score
weighting
Value4.5 s
15/100
10%
Value6.3 s
10/100
25%
Value39.4 s
0/100
10%
Value680 ms
44/100
30%
Value0.773
5/100
15%
Value19.3 s
2/100
10%
6719 ms
1559 ms
3261 ms
19904 ms
19903 ms
Our browser made a total of 63 requests to load all elements on the main page. We found that 90% of them (57 requests) were addressed to the original Ledman.cn, 2% (1 request) were made to S95.cnzz.com and 2% (1 request) were made to Oz.cnzz.com. The less responsive or slowest element that took the longest time to load (20.4 sec) belongs to the original domain Ledman.cn.
Page size can be reduced by 68.3 kB (56%)
121.7 kB
53.4 kB
In fact, the total size of Ledman.cn main page is 121.7 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 5% of websites need less resources to load. Images take 66.6 kB which makes up the majority of the site volume.
Potential reduce by 23.7 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 5.4 kB, which is 18% 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 23.7 kB or 81% of the original size.
Potential reduce by 24.0 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, Ledman needs image optimization as it can save up to 24.0 kB or 36% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 12.3 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 12.3 kB or 83% of the original size.
Potential reduce by 8.3 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. Ledman.cn needs all CSS files to be minified and compressed as it can save up to 8.3 kB or 76% of the original size.
Number of requests can be reduced by 7 (26%)
27
20
The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ledman. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
ledman.cn
6719 ms
common.css
1559 ms
index.css
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jquery-1.8.3.min.js
19539 ms
script.js
19538 ms
jquery.easing.min.js
20056 ms
move.js
20056 ms
jquery.SuperSlide.js
20056 ms
div_move.js
20055 ms
nav_icon.png
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ser_icon.png
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ledman.cn accessibility score
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
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.
ledman.cn best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
ledman.cn SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
ZH
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ledman.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 Ledman.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.
ledman.cn
Open Graph description is not detected on the main page of Ledman. 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: