15.7 sec in total
5.2 sec
10.3 sec
208 ms
Welcome to sjc.pku.edu.cn homepage info - get ready to check Sjc Pku best content for China right away, or after learning these important things about sjc.pku.edu.cn
Visit sjc.pku.edu.cnWe analyzed Sjc.pku.edu.cn page load time and found that the first response time was 5.2 sec and then it took 10.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
sjc.pku.edu.cn performance score
name
value
score
weighting
Value1.9 s
87/100
10%
Value11.4 s
0/100
25%
Value8.0 s
22/100
10%
Value40 ms
100/100
30%
Value0.145
77/100
15%
Value2.1 s
99/100
10%
5222 ms
511 ms
1266 ms
522 ms
512 ms
Our browser made a total of 46 requests to load all elements on the main page. We found that all of those requests were addressed to Sjc.pku.edu.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (5.2 sec) belongs to the original domain Sjc.pku.edu.cn.
Page size can be reduced by 81.6 kB (56%)
145.4 kB
63.7 kB
In fact, the total size of Sjc.pku.edu.cn main page is 145.4 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. HTML takes 91.6 kB which makes up the majority of the site volume.
Potential reduce by 73.8 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 73.8 kB or 81% of the original size.
Potential reduce by 7.5 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, Sjc Pku needs image optimization as it can save up to 7.5 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 312 B
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. Sjc.pku.edu.cn needs all CSS files to be minified and compressed as it can save up to 312 B or 67% of the original size.
Number of requests can be reduced by 41 (91%)
45
4
The browser has sent 45 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sjc Pku. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
sjc.pku.edu.cn
5222 ms
SJC.css
511 ms
top.jpg
1266 ms
xinxi.gif
522 ms
dot.gif
512 ms
dot1.gif
521 ms
search.gif
526 ms
xcsh.gif
996 ms
xhxch.gif
1275 ms
gonggao.gif
1039 ms
dot.gif
1037 ms
xian_01.gif
1450 ms
xueshu.gif
1710 ms
top2.jpg
2170 ms
Top2.jpg
2225 ms
Pic_Line.gif
1987 ms
bg_Line.gif
2190 ms
Gray.gif
2276 ms
xiuxian2.gif
2478 ms
bg_Line-2.gif
2495 ms
news2.gif
2665 ms
xian_04.gif
2533 ms
xian_03.gif
2737 ms
xian_02.gif
2739 ms
lm_top_a.gif
2812 ms
lm_top_1.gif
3086 ms
lm_top_1b.gif
3000 ms
lm_top_2.gif
3299 ms
lm_top_2b.gif
3247 ms
lm_top_3.gif
3707 ms
lm_top_3b.gif
3530 ms
lm_top_4.gif
3856 ms
lm_top_b.gif
3680 ms
back_30.gif
4008 ms
back_22.gif
4097 ms
back_29.gif
4287 ms
back_28.gif
4296 ms
xian_08.gif
4281 ms
xian_09.gif
4095 ms
xian_10.gif
4239 ms
xian_11.gif
4330 ms
student.gif
4515 ms
xiuxian.gif
4053 ms
job.gif
4009 ms
jigou.gif
4077 ms
CC.gif
4008 ms
sjc.pku.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.
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
<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
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
<input type="image"> elements do not have [alt] text
Form elements do not have associated labels
Links do not have a discernible name
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.
sjc.pku.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
Issues were logged in the Issues panel in Chrome Devtools
sjc.pku.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
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
Tap targets are not sized appropriately
ZH
N/A
GB2312
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sjc.pku.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 Sjc.pku.edu.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.
sjc.pku.edu.cn
Open Graph description is not detected on the main page of Sjc Pku. 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: