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w3cschool.cn: w3cschool - 编程狮,随时随地学编程

w3cschool启用中文品牌名--编程狮,是一个专业的W3C前端开发及编程入门学习平台,提供包括HTML,CSS,Javascript,jQuery,C,PHP,Java,Python,Sql,Mysql等编程语言和开源技术的在线教程及使用手册,是类国外w3schools的W3C学习社区及菜鸟编程平台。

Page load speed analysis

  • 68/100

    Normal result
  • 6

    Successful tests
  • 2

    Failed tests
  • First response

    2.8 sec

  • Resources loaded

    3 sec

  • Page rendered

    177 ms

  • Total page load time

    6 sec

Click here to check amazing W 3 Cschool content for China. Otherwise, check out these important facts you probably never knew about w3cschool.cn

We analyzed W3cschool.cn page load time and found that the first response time was 2.8 sec and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Page optimization

  • HTML 12.3 kB
    Images 15.8 kB
    Javascripts 0 B
    CSS 16.2 kB

    In fact, the total size of W3cschool.cn main page is 44.2 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only 5% of websites need less resources to load. CSS take 16.2 kB which makes up the majority of the site volume.

    • Original 12.3 kB
    • After minification 12.0 kB
    • After compression 3.6 kB

    HTML optimization

    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 8.6 kB or 70% of the original size.

    • Original 15.8 kB

    Image optimization

    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. W 3 Cschool images are well optimized though.

    • Original 16.2 kB
    • After minification 12.2 kB
    • After compression 2.6 kB

    CSS optimization

    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. W3cschool.cn needs all CSS files to be minified and compressed as it can save up to 13.6 kB or 84% of the original size.

Network requests diagram

  • w3cschool.cn
  • c3.css
  • site_photoref.jpg
  • site_photoexa.jpg
  • site_photoqe.jpg
  • site_holder.gif
  • site_wrapper.gif
  • site_head_index.gif
  • site_nav.gif

Our browser made a total of 9 requests to load all elements on the main page. We found that all of those requests were addressed to W3cschool.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (2.8 sec) belongs to the original domain W3cschool.cn.

Additional info on w3cschool.cn

Requests

The browser has sent 8 CSS, Javascripts, AJAX and image requests in order to completely render the main page of W 3 Cschool. According to our analytics all requests are already optimized.

7

Images

1

CSS

8

All

Possible request optimization

7

Images

1

CSS

0

Optimized

8

All

Good result

IP address

W3cschool.cn uses IP address which is currently shared with 3 other domains. The more sites share the same IP address, the higher the host server’s workload is. It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.

Poor result

IP Trace

w3cschool.cn

123.w3cschool.cn

m.w3cschool.cn

tedschool.cn

120.79.88.157

DNS records

Type Host Target/ip TTL Other
A

w3cschool.cn

173.254.55.167 3600
NS

w3cschool.cn

ns15.xincache.com 3600
NS

w3cschool.cn

ns16.xincache.com 3600
SOA

w3cschool.cn

3600 Mname: ns15.xincache.com
Rname: hostmaster.xinnetdns.com
Serial: 2002042718
Refresh: 3600
Retry: 900
Expire: 720000
Minimum-ttl: 3600

Language and encoding

Normal result

Language

ZH zh language flag

Detected

ZH zh language flag

Claimed

Encoding

GB2312

Claimed

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise W3cschool.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 W3cschool.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.

HTTPS certificate

SSL Certificate

W3cschool.cn has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Normal result

Visitor World Map

Country of origin for 75.9% of all visits is China. It’s good for W3cschool.cn that their server is also located in China, as that enables the majority of their visitors to benefit from a much faster page load time.

Good result

Poor result

Social Sharing Optimization

Open Graph description is not detected on the main page of W 3 Cschool. 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:

w3cschool.cn

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