53.9 sec in total
2.6 sec
48.7 sec
2.6 sec
Welcome to alu.cn homepage info - get ready to check Alu best content for China right away, or after learning these important things about alu.cn
中国铝业网是专业的B2B铝行业平台信息网站,致力于中国铝行业的中铝公司或者个人提供铝业行情资讯(如最新中铝价格)、铝业信息技术(如硫酸铝的最新应用)、铝业知识分类(如铝分为铝合金、铝型材等等)、铝的供应求购信息(如我要铝合金门窗)、铝业人才招聘等丰富信息内容;更多信息可登陆中国铝业网 www.alu.cn
Visit alu.cnWe analyzed Alu.cn page load time and found that the first response time was 2.6 sec and then it took 51.3 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.
alu.cn performance score
name
value
score
weighting
Value4.4 s
17/100
10%
Value9.0 s
1/100
25%
Value21.3 s
0/100
10%
Value2,080 ms
7/100
30%
Value0.041
99/100
15%
Value18.5 s
3/100
10%
2618 ms
9527 ms
3053 ms
1749 ms
1570 ms
Our browser made a total of 138 requests to load all elements on the main page. We found that 3% of them (4 requests) were addressed to the original Alu.cn, 38% (52 requests) were made to Meta.alu.cn and 35% (48 requests) were made to Img.alu.cn. The less responsive or slowest element that took the longest time to load (20 sec) relates to the external source Meta.alu.cn.
Page size can be reduced by 323.8 kB (42%)
768.7 kB
444.9 kB
In fact, the total size of Alu.cn main page is 768.7 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. 40% of websites need less resources to load. Images take 391.0 kB which makes up the majority of the site volume.
Potential reduce by 170.1 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 170.1 kB or 82% of the original size.
Potential reduce by 60.6 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, Alu needs image optimization as it can save up to 60.6 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 42.4 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 42.4 kB or 40% of the original size.
Potential reduce by 50.6 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. Alu.cn needs all CSS files to be minified and compressed as it can save up to 50.6 kB or 79% of the original size.
Number of requests can be reduced by 41 (30%)
135
94
The browser has sent 135 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Alu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
alu.cn
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alu.cn 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.
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
<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
alu.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
Missing source maps for large first-party JavaScript
Issues were logged in the Issues panel in Chrome Devtools
alu.cn 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
N/A
N/A
GB2312
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Alu.cn can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Alu.cn 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.
alu.cn
Open Graph description is not detected on the main page of Alu. 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: