21.4 sec in total
2.1 sec
19 sec
250 ms
Visit i21st.cn now to see the best up-to-date I 21 St content for China and also check out these interesting facts you probably never knew about i21st.cn
21英语网是极具原创性的英语学习和教学网站,拥有独家的英语学习资料及教育资料,专注于打造最具人气的英语学习交流平台,为全国英语学习者和教育者提供专业服务。
Visit i21st.cnWe analyzed I21st.cn page load time and found that the first response time was 2.1 sec and then it took 19.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.
i21st.cn performance score
name
value
score
weighting
Value2.6 s
62/100
10%
Value4.5 s
36/100
25%
Value2.6 s
97/100
10%
Value0 ms
100/100
30%
Value0.022
100/100
15%
Value2.6 s
98/100
10%
2122 ms
540 ms
806 ms
546 ms
543 ms
Our browser made a total of 89 requests to load all elements on the main page. We found that 64% of them (57 requests) were addressed to the original I21st.cn, 11% (10 requests) were made to V3.jiathis.com and 8% (7 requests) were made to Img.t.sinajs.cn. The less responsive or slowest element that took the longest time to load (7.2 sec) relates to the external source Widget.weibo.com.
Page size can be reduced by 527.4 kB (34%)
1.6 MB
1.0 MB
In fact, the total size of I21st.cn main page is 1.6 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. 50% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.
Potential reduce by 62.1 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 62.1 kB or 80% of the original size.
Potential reduce by 168.4 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. Obviously, I 21 St needs image optimization as it can save up to 168.4 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 160.1 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 160.1 kB or 64% of the original size.
Potential reduce by 136.8 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. I21st.cn needs all CSS files to be minified and compressed as it can save up to 136.8 kB or 84% of the original size.
Number of requests can be reduced by 25 (29%)
87
62
The browser has sent 87 CSS, Javascripts, AJAX and image requests in order to completely render the main page of I 21 St. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
www.i21st.cn
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i21st.css
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jquery.js
806 ms
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i21st_mjump.js
543 ms
jquery.rotation.css
555 ms
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show_ps3.js
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jiathis_r.js
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weiboShow.css
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skin_default.css
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gaea_1_19.js
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1
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i21st.cn 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
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.
i21st.cn best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
i21st.cn 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
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
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise I21st.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it does not match the claimed English language. Our system also found out that I21st.cn main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
i21st.cn
Open Graph description is not detected on the main page of I 21 St. 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: