Access lib.tjcu.edu.cn. 天津商业大学图书馆

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

75/100

10%

LCP (Largest Contentful Paint)

Value8.5 s

2/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.2 s

85/100

10%

lib.tjcu.edu.cn

2950 ms

base.css

817 ms

qh.css

839 ms

jquery-1.6.2.min.js

1899 ms

imgSlide.js

551 ms

Our browser made a total of 74 requests to load all elements on the main page. We found that 91% of them (67 requests) were addressed to the original Lib.tjcu.edu.cn, 1% (1 request) were made to Tool.alixixi.com and 1% (1 request) were made to S23.cnzz.com. The less responsive or slowest element that took the longest time to load (18.8 sec) relates to the external source Tool.alixixi.com.

Content Size

1.3 MB

After Optimization

886.5 kB

In fact, the total size of Lib.tjcu.edu.cn main page is 1.3 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. 35% of websites need less resources to load. Images take 949.0 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 42.9 kB

Original 54.4 kB
After minification 48.7 kB
After compression 11.6 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. This page needs HTML code to be minified as it can gain 5.7 kB, which is 11% 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 42.9 kB or 79% of the original size.

Image Optimization

-16%

Potential reduce by 156.5 kB

Original 949.0 kB
After minification 792.5 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 Tjcu needs image optimization as it can save up to 156.5 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-68%

Potential reduce by 167.2 kB

Original 247.0 kB
After minification 230.2 kB
After compression 79.8 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 167.2 kB or 68% of the original size.

CSS Optimization

-74%

Potential reduce by 7.4 kB

Original 9.9 kB
After minification 8.2 kB
After compression 2.6 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.tjcu.edu.cn needs all CSS files to be minified and compressed as it can save up to 7.4 kB or 74% of the original size.

Requests Now

After Optimization

The browser has sent 71 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lib Tjcu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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 keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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 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>).

These items highlight common accessibility best practices.

High

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

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

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

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

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

UTF-8

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

Social Sharing Optimization

lib.tjcu.edu.cn

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

天津商业大学图书馆

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.tjcu.edu.cn

base.css

qh.css

jquery-1.6.2.min.js

imgSlide.js

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.tjcu.edu.cn

base.css

qh.css

jquery-1.6.2.min.js

imgSlide.js

tab.js

date.js

jquery.min.js

wul_web.js

jquery.flexslider-min.js

js.js

system.js

autocomplete.js

search_box.js

stat.php

bg.jpg

dot3.jpg

dot4.jpg

dot1.jpg

bz.jpg

narrow.jpg

arrow.jpg

search.gif

yyxt.jpg

dsjkms.jpg

luxun.jpg

sheji.jpg

kth.jpg

rgjy.jpg

jingjixue.jpg

ydzx.jpg

dsdr.jpg

more.jpg

more0.jpg

17_1.jpg

17_2.jpg

17_3.jpg

17_4.jpg

17_5.jpg

17_6.jpg

17_7.jpg

17_8.jpg

17_9.jpg