5.6 sec in total
955 ms
4.5 sec
122 ms
Click here to check amazing Mails Tsinghua content for China. Otherwise, check out these important facts you probably never knew about mails.tsinghua.edu.cn
Visit mails.tsinghua.edu.cnWe analyzed Mails.tsinghua.edu.cn page load time and found that the first response time was 955 ms and then it took 4.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
mails.tsinghua.edu.cn performance score
name
value
score
weighting
Value7.8 s
0/100
10%
Value8.6 s
1/100
25%
Value12.9 s
2/100
10%
Value550 ms
54/100
30%
Value0
100/100
15%
Value8.2 s
41/100
10%
955 ms
459 ms
467 ms
468 ms
1631 ms
Our browser made a total of 12 requests to load all elements on the main page. We found that all of those requests were addressed to Mails.tsinghua.edu.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (2.1 sec) belongs to the original domain Mails.tsinghua.edu.cn.
Page size can be reduced by 90.8 kB (23%)
390.1 kB
299.3 kB
In fact, the total size of Mails.tsinghua.edu.cn main page is 390.1 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. Only 5% of websites need less resources to load. Images take 267.8 kB which makes up the majority of the site volume.
Potential reduce by 3.7 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. This page needs HTML code to be minified as it can gain 697 B, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 3.7 kB or 63% of the original size.
Potential reduce by 9.3 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. Mails Tsinghua images are well optimized though.
Potential reduce by 74.5 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 74.5 kB or 67% of the original size.
Potential reduce by 3.2 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. Mails.tsinghua.edu.cn needs all CSS files to be minified and compressed as it can save up to 3.2 kB or 68% of the original size.
We found no issues to fix!
11
11
The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mails Tsinghua. According to our analytics all requests are already optimized.
mails.tsinghua.edu.cn
955 ms
reset.css
459 ms
css.css
467 ms
xs.css
468 ms
jquery-1.8.1.min.js
1631 ms
jquery.blockUI.js
932 ms
logo_xs.png
466 ms
bg_xs.jpg
2098 ms
input_center_bg.png
235 ms
input_top_bg.png
236 ms
mail1_10.png
237 ms
input_bottom_bg.png
237 ms
mails.tsinghua.edu.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.
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
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.
mails.tsinghua.edu.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
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
mails.tsinghua.edu.cn 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
N/A
N/A
GBK
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Mails.tsinghua.edu.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 Mails.tsinghua.edu.cn main page’s claimed encoding is gbk. 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.
mails.tsinghua.edu.cn
Open Graph description is not detected on the main page of Mails Tsinghua. 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: