Access threedbook.com. 三书Threedbook - 基于云的3D模型渲染与分享

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

60/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

77/100

25%

SI (Speed Index)

Value7.7 s

24/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.318

36/100

15%

TTI (Time to Interactive)

Value17.8 s

4/100

10%

threedbook.com

457 ms

www.threedbook.com

876 ms

hot

599 ms

bootstrap.min.css

435 ms

Common.css

645 ms

Our browser made a total of 133 requests to load all elements on the main page. We found that all of those requests were addressed to Threedbook.com and no external sources were called. The less responsive or slowest element that took the longest time to load (4.4 sec) belongs to the original domain Threedbook.com.

Content Size

475.1 kB

After Optimization

153.2 kB

In fact, the total size of Threedbook.com main page is 475.1 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. 70% of websites need less resources to load. HTML takes 330.5 kB which makes up the majority of the site volume.

HTML Optimization

-95%

Potential reduce by 315.6 kB

Original 330.5 kB
After minification 208.1 kB
After compression 14.9 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 122.4 kB, which is 37% 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 315.6 kB or 95% of the original size.

Image Optimization

-19%

Potential reduce by 3.3 kB

Original 17.5 kB
After minification 14.2 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, Threedbook needs image optimization as it can save up to 3.3 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

-2%

Potential reduce by 1.5 kB

Original 94.6 kB
After minification 94.6 kB
After compression 93.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-5%

Potential reduce by 1.5 kB

Original 32.4 kB
After minification 32.4 kB
After compression 31.0 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. Threedbook.com has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Threedbook. 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 from 7 to 1 for CSS 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.

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

Low

Detected JavaScript libraries

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Threedbook.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Threedbook.com 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

threedbook.com

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

三书Threedbook - 基于云的3D模型渲染与分享

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

threedbook.com

www.threedbook.com

hot

bootstrap.min.css

Common.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

threedbook.com

www.threedbook.com

hot

bootstrap.min.css

Common.css

font-awesome.min.css

OpenSansLight300.css

blue.css

popup.css

Model-Thumbnail.css

jquery-1.11.2.min.js

bootstrap.min.js

jquery.easing.min.js

bootstrap-hover-dropdown.min.js

sea.js

login_setup.js

masonry.pkgd.min.js

imagesloaded.pkgd.min.js

Threedbook-Logo-Text-Yellow_White.svg

Logo-02-Icon+Text-14.png

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