13.7 sec in total
2.6 sec
10.9 sec
162 ms
Click here to check amazing Summer School Sjtu content for China. Otherwise, check out these important facts you probably never knew about summerschool.sjtu.edu.cn
Antai Global Summer Program | Shang Hai Jiao Tong University
Visit summerschool.sjtu.edu.cnWe analyzed Summerschool.sjtu.edu.cn page load time and found that the first response time was 2.6 sec and then it took 11.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
summerschool.sjtu.edu.cn performance score
name
value
score
weighting
Value5.9 s
4/100
10%
Value7.7 s
3/100
25%
Value15.9 s
0/100
10%
Value180 ms
92/100
30%
Value0.012
100/100
15%
Value6.4 s
59/100
10%
2586 ms
855 ms
576 ms
576 ms
860 ms
Our browser made a total of 58 requests to load all elements on the main page. We found that 95% of them (55 requests) were addressed to the original Summerschool.sjtu.edu.cn, 3% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (8.5 sec) belongs to the original domain Summerschool.sjtu.edu.cn.
Page size can be reduced by 419.1 kB (18%)
2.3 MB
1.9 MB
In fact, the total size of Summerschool.sjtu.edu.cn main page is 2.3 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. 40% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.
Potential reduce by 21.2 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 21.2 kB or 79% of the original size.
Potential reduce by 122.1 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. Summer School Sjtu images are well optimized though.
Potential reduce by 214.5 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 214.5 kB or 68% of the original size.
Potential reduce by 61.4 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. Summerschool.sjtu.edu.cn needs all CSS files to be minified and compressed as it can save up to 61.4 kB or 81% of the original size.
Number of requests can be reduced by 31 (55%)
56
25
The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Summer School 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 15 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.
summerschool.sjtu.edu.cn
2586 ms
system.base.css
855 ms
system.menus.css
576 ms
system.messages.css
576 ms
system.theme.css
860 ms
comment.css
566 ms
field.css
582 ms
node.css
582 ms
search.css
845 ms
user.css
845 ms
views.css
858 ms
ckeditor.css
881 ms
ctools.css
862 ms
superfish.css
878 ms
default.css
1125 ms
reset.css
1128 ms
main.css
1156 ms
drupal.css
1427 ms
jquery.min.js
2327 ms
jquery.once.js
1164 ms
drupal.js
1411 ms
jquery.hoverIntent.minified.js
1411 ms
supposition.js
1444 ms
superfish.js
1445 ms
supersubs.js
1692 ms
superfish.js
1695 ms
jquery.easing.min.js
1722 ms
custom.js
1737 ms
modernizr.js
1737 ms
ckplayer.js
2265 ms
minimalist.css
2556 ms
jquery-1.11.0.min.js
2849 ms
flowplayer.js
2902 ms
slider01.jpg
8536 ms
slider02.jpg
3197 ms
slider03.jpg
6068 ms
slider04.jpg
7689 ms
slider05.jpg
4623 ms
slider06.jpg
3789 ms
slider07.jpg
4703 ms
slider08.jpg
4923 ms
slider09.jpg
8301 ms
videoimg10.jpg
5267 ms
videoimg20.jpg
5241 ms
videoimg30.jpg
5263 ms
bg.jpg
7249 ms
logo.jpg
3491 ms
navdot.png
3726 ms
solid.gif
3775 ms
but_apply.png
4007 ms
footer_icon.jpg
4066 ms
trans.gif
4290 ms
analytics.js
33 ms
navdot_active.png
4310 ms
white.png
4544 ms
videoimg1.jpg
4893 ms
collect
15 ms
collect
67 ms
summerschool.sjtu.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
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
summerschool.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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
summerschool.sjtu.edu.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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Summerschool.sjtu.edu.cn can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Summerschool.sjtu.edu.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.
summerschool.sjtu.edu.cn
Open Graph description is not detected on the main page of Summer School 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: