47.4 sec in total
3 sec
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3.2 sec
Visit developer.51cto.com now to see the best up-to-date Developer 51CTO content for China and also check out these interesting facts you probably never knew about developer.51cto.com
51CTO-向开发者分享前端开发、后端开发、游戏开发、测试开发、开发工具、中台与架构、VR与AR等相关软件开发的技术资讯与实践案例。
Visit developer.51cto.comWe analyzed Developer.51cto.com page load time and found that the first response time was 3 sec and then it took 44.4 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 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.
developer.51cto.com performance score
name
value
score
weighting
Value17.9 s
0/100
10%
Value20.1 s
0/100
25%
Value22.5 s
0/100
10%
Value470 ms
60/100
30%
Value0
100/100
15%
Value21.1 s
1/100
10%
2982 ms
2034 ms
1102 ms
13852 ms
2865 ms
Our browser made a total of 93 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Developer.51cto.com, 18% (17 requests) were made to Images.51cto.com and 17% (16 requests) were made to 51cto.com. The less responsive or slowest element that took the longest time to load (20.5 sec) relates to the external source I2.51cto.com.
Page size can be reduced by 385.9 kB (19%)
2.0 MB
1.7 MB
In fact, the total size of Developer.51cto.com main page is 2.0 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. 25% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.
Potential reduce by 75.2 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 75.2 kB or 80% of the original size.
Potential reduce by 93.3 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. Developer 51CTO images are well optimized though.
Potential reduce by 205.3 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 205.3 kB or 63% of the original size.
Potential reduce by 12.2 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. Developer.51cto.com needs all CSS files to be minified and compressed as it can save up to 12.2 kB or 77% of the original size.
Number of requests can be reduced by 38 (47%)
81
43
The browser has sent 81 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Developer 51CTO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and as a result speed up the page load time.
developer.51cto.com
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developer.51cto.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.
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.
developer.51cto.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
General
Impact
Issue
Detected JavaScript libraries
developer.51cto.com SEO score
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
GB2312
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Developer.51cto.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 Developer.51cto.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.
developer.51cto.com
Open Graph description is not detected on the main page of Developer 51CTO. 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: