Access ledman.cn. 雷曼全球领先的LED超高清显示专家-深圳雷曼光电科技股份有限公司

Report Summary

About Website

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。

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name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value38.1 s

0/100

10%

TBT (Total Blocking Time)

Value110 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value1.126

1/100

15%

TTI (Time to Interactive)

Value23.0 s

1/100

10%

ledman.cn

814 ms

ledman.cn

1015 ms

www.ledman.cn

1964 ms

beginning.css

267 ms

public.css

535 ms

Our browser made a total of 77 requests to load all elements on the main page. We found that 87% of them (67 requests) were addressed to the original Ledman.cn, 3% (2 requests) were made to Hm.baidu.com and 3% (2 requests) were made to Ecfk.workec.com. The less responsive or slowest element that took the longest time to load (9.2 sec) belongs to the original domain Ledman.cn.

Content Size

1.7 MB

After Optimization

1.4 MB

In fact, the total size of Ledman.cn 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. 60% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 93.9 kB

Original 129.3 kB
After minification 106.1 kB
After compression 35.4 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 23.2 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 93.9 kB or 73% of the original size.

Image Optimization

-17%

Potential reduce by 228.5 kB

Original 1.4 MB
After minification 1.1 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. Obviously, Ledman needs image optimization as it can save up to 228.5 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-11%

Potential reduce by 20.3 kB

Original 191.2 kB
After minification 191.2 kB
After compression 170.9 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 20.3 kB or 11% of the original size.

CSS Optimization

-30%

Potential reduce by 5.4 kB

Original 18.1 kB
After minification 17.8 kB
After compression 12.8 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. Ledman.cn needs all CSS files to be minified and compressed as it can save up to 5.4 kB or 30% of the original size.

Requests Now

After Optimization

The browser has sent 72 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 from 11 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Language and Encoding

Language Detected

Language Claimed

Encoding

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 it matches the claimed language. 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.

Social Sharing Optimization

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:

Report Summary

Performance

Accessibility

Best Practices

SEO

雷曼 全球领先的LED超高清显示专家-深圳雷曼光电科技股份有限公司

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

ledman.cn

ledman.cn

www.ledman.cn

beginning.css

public.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

ledman.cn

ledman.cn

www.ledman.cn

beginning.css

public.css

jquery.min.js

animate.css

swiper.min.css

index.css

jquery.SuperSlide.js

jwplayer2.js

govicon.js

wow.js

swiper.min.js

public.js

hm.js

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language.png

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雷曼全球领先的LED超高清显示专家-深圳雷曼光电科技股份有限公司