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name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

17/100

10%

LCP (Largest Contentful Paint)

Value4.8 s

30/100

25%

SI (Speed Index)

Value9.9 s

10/100

10%

TBT (Total Blocking Time)

Value90 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value5.9 s

66/100

10%

caao.net

1377 ms

widgetkit-77e4dcc2.css

131 ms

bootstrap.css

151 ms

mootools-core.js

171 ms

core.js

117 ms

Our browser made a total of 125 requests to load all elements on the main page. We found that 72% of them (90 requests) were addressed to the original Caao.net, 9% (11 requests) were made to Apis.google.com and 7% (9 requests) were made to Calendar.google.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Caao.net.

Content Size

2.7 MB

After Optimization

1.6 MB

In fact, the total size of Caao.net main page is 2.7 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. 65% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 52.0 kB

Original 73.0 kB
After minification 71.3 kB
After compression 21.0 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 52.0 kB or 71% of the original size.

Image Optimization

-15%

Potential reduce by 219.9 kB

Original 1.5 MB
After minification 1.3 MB

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, Caao needs image optimization as it can save up to 219.9 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-64%

Potential reduce by 397.4 kB

Original 617.5 kB
After minification 615.3 kB
After compression 220.2 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 397.4 kB or 64% of the original size.

CSS Optimization

-85%

Potential reduce by 433.0 kB

Original 508.5 kB
After minification 377.3 kB
After compression 75.5 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. Caao.net needs all CSS files to be minified and compressed as it can save up to 433.0 kB or 85% of the original size.

Requests Now

117

After Optimization

The browser has sent 117 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Caao. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and from 32 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

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>).

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

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

ZH
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Caao.net can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it does not match the claimed English language. Our system also found out that Caao.net 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

caao.net

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

曹操读书网--中文TXT电子书导读免费下载资源聚合门户！

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

caao.net

widgetkit-77e4dcc2.css

bootstrap.css

mootools-core.js

core.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

caao.net

widgetkit-77e4dcc2.css

bootstrap.css

mootools-core.js

core.js

jquery.min.js

jquery-noconflict.js

jquery-migrate.min.js

k2.js

widgetkit-8c5b1188.js

bootstrap.min.js

uikit.css

base.css

extensions.css

tools.css

layout.css

menus.css

modules.css

system.css

k2.css

equip.css

robotoslab.css

equip.css

equip.css

responsive.css

print.css

custom.css

equip.css

robotoslab.css

warp.js

responsive.js

accordionmenu.js

dropdownmenu.js

uikit.min.js

template.js

search.js

lightbox.js

mediaelement-and-player.js

spotlight.js

uikit.css

base.css

tools.css

modules.css