8.3 sec in total
2.1 sec
6.1 sec
132 ms
Click here to check amazing Iac Sjtu content for China. Otherwise, check out these important facts you probably never knew about iac.sjtu.edu.cn
分析测试中心
Visit iac.sjtu.edu.cnWe analyzed Iac.sjtu.edu.cn page load time and found that the first response time was 2.1 sec and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
iac.sjtu.edu.cn performance score
name
value
score
weighting
Value6.3 s
3/100
10%
Value46.6 s
0/100
25%
Value14.8 s
1/100
10%
Value2,820 ms
3/100
30%
Value0.021
100/100
15%
Value38.3 s
0/100
10%
2079 ms
1663 ms
2220 ms
279 ms
559 ms
Our browser made a total of 30 requests to load all elements on the main page. We found that 80% of them (24 requests) were addressed to the original Iac.sjtu.edu.cn, 7% (2 requests) were made to Hm.baidu.com and 3% (1 request) were made to Weather.news.sina.com.cn. The less responsive or slowest element that took the longest time to load (2.2 sec) belongs to the original domain Iac.sjtu.edu.cn.
Page size can be reduced by 226.1 kB (49%)
456.9 kB
230.8 kB
In fact, the total size of Iac.sjtu.edu.cn main page is 456.9 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. 15% of websites need less resources to load. Javascripts take 187.8 kB which makes up the majority of the site volume.
Potential reduce by 41.3 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 41.3 kB or 81% of the original size.
Potential reduce by 27.3 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. Obviously, Iac Sjtu needs image optimization as it can save up to 27.3 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 121.1 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 121.1 kB or 64% of the original size.
Potential reduce by 36.4 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. Iac.sjtu.edu.cn needs all CSS files to be minified and compressed as it can save up to 36.4 kB or 82% of the original size.
Number of requests can be reduced by 3 (10%)
29
26
The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Iac Sjtu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.
iac.sjtu.edu.cn
2079 ms
style.css
1663 ms
jquery.10.2.js
2220 ms
back_bg.gif
279 ms
logo.png
559 ms
wx.jpg
280 ms
37_thumb_G_1389188830543.jpg
834 ms
112_thumb_G_1457337257686.jpg
558 ms
99_thumb_G_1397788684356.jpg
1117 ms
111_thumb_G_1456995569785.jpg
1118 ms
44_thumb_G_1389190266851.jpg
1703 ms
101_thumb_G_1402455350016.jpg
835 ms
107_thumb_G_1442293202133.jpg
836 ms
105_thumb_G_1433828795803.jpg
1111 ms
104_thumb_G_1421118169083.jpg
1113 ms
76_thumb_G_1441944638375.jpg
1113 ms
106_thumb_G_1441941401004.jpg
1389 ms
103_thumb_G_1419313926411.jpg
1390 ms
fot_img0.gif
1391 ms
weatherStyle2.html
911 ms
serchss.gif
1379 ms
bg.jpg
1380 ms
style.css
2205 ms
index_hot.gif
1653 ms
bg.gif
1653 ms
h.js
1592 ms
jquery-1.7.2.min.js
831 ms
21.gif
1233 ms
hm.gif
452 ms
forecast
744 ms
iac.sjtu.edu.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
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
List items (<li>) are not contained within <ul> or <ol> parent elements.
iac.sjtu.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
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
Page has valid source maps
iac.sjtu.edu.cn 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
ZH
N/A
GBK
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Iac.sjtu.edu.cn 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 Iac.sjtu.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.
iac.sjtu.edu.cn
Open Graph description is not detected on the main page of Iac Sjtu. 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: