Access lib.nuaa.edu.cn. 南京航空航天大学图书馆

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

68/100

10%

LCP (Largest Contentful Paint)

Value2.8 s

84/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value1,080 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.2 s

85/100

10%

lib.nuaa.edu.cn

2850 ms

style.css

1160 ms

cms.css

1156 ms

sort.css

585 ms

jquery.autocomplete.css

587 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 95% of them (74 requests) were addressed to the original Lib.nuaa.edu.cn, 5% (4 requests) were made to Chatserver.comm100.cn. The less responsive or slowest element that took the longest time to load (2.9 sec) belongs to the original domain Lib.nuaa.edu.cn.

Content Size

658.2 kB

After Optimization

237.7 kB

In fact, the total size of Lib.nuaa.edu.cn main page is 658.2 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. 25% of websites need less resources to load. Javascripts take 461.2 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 37.0 kB

Original 47.6 kB
After minification 44.3 kB
After compression 10.6 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 37.0 kB or 78% of the original size.

Image Optimization

-19%

Potential reduce by 22.7 kB

Original 120.2 kB
After minification 97.5 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, Lib Nuaa needs image optimization as it can save up to 22.7 kB or 19% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-73%

Potential reduce by 337.7 kB

Original 461.2 kB
After minification 434.0 kB
After compression 123.4 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 337.7 kB or 73% of the original size.

CSS Optimization

-79%

Potential reduce by 23.0 kB

Original 29.2 kB
After minification 23.2 kB
After compression 6.2 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. Lib.nuaa.edu.cn needs all CSS files to be minified and compressed as it can save up to 23.0 kB or 79% of the original size.

Requests Now

After Optimization

The browser has sent 76 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lib Nuaa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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

High

<html> element does not have a [lang] attribute

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.

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

GB2312

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

Social Sharing Optimization

lib.nuaa.edu.cn

Open Graph description is not detected on the main page of Lib Nuaa. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

南京航空航天大学图书馆

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

lib.nuaa.edu.cn

style.css

cms.css

sort.css

jquery.autocomplete.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

lib.nuaa.edu.cn

style.css

cms.css

sort.css

jquery.autocomplete.css

inc.js

default.js

swfobject.js

xp_progress.js

jquery-1.4.2.min.js

jquery.autocomplete.js

mdiv.js

bencandy.js

WdatePicker.js

sliding.js

jquery-1.4.2.min.js

LiveChat.js

message.js

mdiv_content1.js

count.php

WdatePicker.css

13.png

BBS.aspx

logo_bg.gif

l_bg.gif

nh_03.gif

nh_04.gif

nh_05.gif

new.gif

hot.gif

ss_19.jpg

p_05.gif

p_06.gif

p_07.gif

p_13.gif

p_14.gif

p_15.gif

r_21.gif

hd_04.gif

hd_03.gif

1.png

2.png

7_20160308_2016%E7%A0%94%E8%AE%A8%E9%97%B4%E6%8E%A8%E5%B9%BF.jpg