7.5 sec in total
895 ms
6.4 sec
273 ms
Visit 51dzw.com now to see the best up-to-date 51DZW content for China and also check out these interesting facts you probably never knew about 51dzw.com
51电子网(51dzw.com)是国内最专业的IC电子交易平台,集IC、电子元器件、二三极管、电子/容管等供求信息,拥有五千万条IC型号和四百多万的电子元器件PDF资料。51电子网立足于电子元件供应商和电子产品生产商服务,为各类电子元件供应商提供发布供应信息平台,也为电子产品生产商提供采平台和自己的产品展示平台。
Visit 51dzw.comWe analyzed 51dzw.com page load time and found that the first response time was 895 ms and then it took 6.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
51dzw.com performance score
name
value
score
weighting
Value3.5 s
35/100
10%
Value6.9 s
6/100
25%
Value9.8 s
10/100
10%
Value110 ms
97/100
30%
Value0
100/100
15%
Value4.4 s
83/100
10%
895 ms
1671 ms
1054 ms
1271 ms
1068 ms
Our browser made a total of 117 requests to load all elements on the main page. We found that 8% of them (9 requests) were addressed to the original 51dzw.com, 50% (58 requests) were made to Public.51dzw.com and 22% (26 requests) were made to Member.51dzw.com. The less responsive or slowest element that took the longest time to load (2 sec) relates to the external source Ads.51dzw.com.
Page size can be reduced by 206.4 kB (13%)
1.5 MB
1.3 MB
In fact, the total size of 51dzw.com main page is 1.5 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. 45% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 113.8 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 113.8 kB or 78% of the original size.
Potential reduce by 29.4 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. 51DZW images are well optimized though.
Potential reduce by 62.5 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 62.5 kB or 42% of the original size.
Potential reduce by 712 B
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. 51dzw.com has all CSS files already compressed.
Number of requests can be reduced by 32 (29%)
110
78
The browser has sent 110 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51DZW. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and as a result speed up the page load time.
51dzw.com
895 ms
www.51dzw.com
1671 ms
index.css
1054 ms
jquery.min.js
1271 ms
MSClass2.9.js
1068 ms
comm.js
1069 ms
index.js
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jquery.SuperSlide.2.1.3.js
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phoneShow.js
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CandKlogo.png
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push.js
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jquery.min.js
435 ms
flash.js
208 ms
MSClass2.9.js
425 ms
comm.js
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jquery.min.js
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logger.js
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51dzw.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
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
List items (<li>) are not contained within <ul> or <ol> parent elements.
51dzw.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
Browser errors were logged to the console
Issues were logged in the Issues panel in Chrome Devtools
51dzw.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
GB2312
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51dzw.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 51dzw.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.
51dzw.com
Open Graph description is not detected on the main page of 51DZW. 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: