27.5 sec in total
3.2 sec
24 sec
274 ms
Click here to check amazing 51 Hei content for China. Otherwise, check out these important facts you probably never knew about 51hei.com
本站提供单片机视频教程,51单片机学习开发资料,C语言汇编教程,仿真软件下载,还有技术论坛提供交流,是学习者和电子工程师不容错过的技术站点
Visit 51hei.comWe analyzed 51hei.com page load time and found that the first response time was 3.2 sec and then it took 24.2 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.
51hei.com performance score
name
value
score
weighting
Value1.5 s
95/100
10%
Value2.3 s
93/100
25%
Value4.9 s
66/100
10%
Value30 ms
100/100
30%
Value0.002
100/100
15%
Value3.8 s
90/100
10%
3232 ms
4499 ms
781 ms
9056 ms
5399 ms
Our browser made a total of 63 requests to load all elements on the main page. We found that 86% of them (54 requests) were addressed to the original 51hei.com, 10% (6 requests) were made to Bdimg.share.baidu.com and 3% (2 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (12.1 sec) belongs to the original domain 51hei.com.
Page size can be reduced by 228.5 kB (56%)
409.6 kB
181.0 kB
In fact, the total size of 51hei.com main page is 409.6 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. 20% of websites need less resources to load. Javascripts take 224.0 kB which makes up the majority of the site volume.
Potential reduce by 41.4 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. 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 41.4 kB or 78% of the original size.
Potential reduce by 5.3 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. 51 Hei images are well optimized though.
Potential reduce by 153.6 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 153.6 kB or 69% of the original size.
Potential reduce by 28.2 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. 51hei.com needs all CSS files to be minified and compressed as it can save up to 28.2 kB or 79% of the original size.
Number of requests can be reduced by 27 (44%)
62
35
The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Hei. 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 as a result speed up the page load time.
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51hei.com accessibility score
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
Form elements do not have associated labels
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
List items (<li>) are not contained within <ul> or <ol> parent elements.
51hei.com 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
51hei.com SEO score
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
ZH
N/A
GB2312
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51hei.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 51hei.com main page’s claimed encoding is gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
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51hei.com
Open Graph description is not detected on the main page of 51 Hei. 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: