Tools & Wizards About Us
isee.zju.edu.cn screenshot

Report Summary

  • 91

    Performance

    Renders faster than
    91% of other websites

  • 66

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

isee.zju.edu.cn

Zhejiang University Email system

Page Load Speed

12.2 sec in total

First Response

4.6 sec

Resources Loaded

7.5 sec

Page Rendered

127 ms

isee.zju.edu.cn screenshot

About Website

Visit isee.zju.edu.cn now to see the best up-to-date Isee Zju content for China and also check out these interesting facts you probably never knew about isee.zju.edu.cn

Visit isee.zju.edu.cn

Key Findings

We analyzed Isee.zju.edu.cn page load time and found that the first response time was 4.6 sec and then it took 7.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

isee.zju.edu.cn performance score

91

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

94/100

10%

LCP (Largest Contentful Paint)

Value1.9 s

98/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.017

100/100

15%

TTI (Time to Interactive)

Value1.6 s

100/100

10%

Network Requests Diagram

isee.zju.edu.cn

4575 ms

login.css

523 ms

login.js

790 ms

MailL_Top_bg.gif

265 ms

logo.gif

527 ms

Our browser made a total of 11 requests to load all elements on the main page. We found that all of those requests were addressed to Isee.zju.edu.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (4.6 sec) belongs to the original domain Isee.zju.edu.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 8.8 kB (70%)

Content Size

12.5 kB

After Optimization

3.7 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Isee.zju.edu.cn main page is 12.5 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 5.1 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 3.9 kB

  • Original 5.1 kB
  • After minification 3.1 kB
  • After compression 1.2 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. This page needs HTML code to be minified as it can gain 2.0 kB, which is 39% 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 3.9 kB or 76% of the original size.

JavaScript Optimization

-62%

Potential reduce by 2.4 kB

  • Original 3.9 kB
  • After minification 3.7 kB
  • After compression 1.5 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 2.4 kB or 62% of the original size.

CSS Optimization

-70%

Potential reduce by 2.5 kB

  • Original 3.5 kB
  • After minification 3.0 kB
  • After compression 1.1 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. Isee.zju.edu.cn needs all CSS files to be minified and compressed as it can save up to 2.5 kB or 70% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

10

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Isee Zju. According to our analytics all requests are already optimized.

Network Requests Diagram

isee.zju.edu.cn

isee.zju.edu.cn

4575 ms

login.css

login.css

523 ms

login.js

login.js

790 ms

MailL_Top_bg.gif

MailL_Top_bg.gif

265 ms

logo.gif

logo.gif

527 ms

pic.gif

pic.gif

2407 ms

MailL_B_bg.gif

MailL_B_bg.gif

527 ms

opt_title.gif

opt_title.gif

528 ms

button.gif

button.gif

790 ms

input_bg.gif

input_bg.gif

528 ms

footer.gif

footer.gif

789 ms

Accessibility Review

isee.zju.edu.cn accessibility score

66

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<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

High

Form elements do not have associated labels

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

isee.zju.edu.cn best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

isee.zju.edu.cn SEO score

92

Search Engine Optimization Advices

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    GBK

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Isee.zju.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 Isee.zju.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.

Social Sharing Optimization

isee.zju.edu.cn

Open Graph description is not detected on the main page of Isee Zju. 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: