Access 51web.com. 成都世纪东方网络通信有限公司-世纪东方-【世纪云】云主机就选世纪云-世纪云主机高安全可用免费试用建站无忧

name

value

score

weighting

FCP (First Contentful Paint)

Value7.8 s

0/100

10%

LCP (Largest Contentful Paint)

Value17.9 s

0/100

25%

SI (Speed Index)

Value18.7 s

0/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value13.6 s

11/100

10%

www.51web.com

5969 ms

base.css

2129 ms

common.css

4015 ms

page.css

2157 ms

layer.css

2140 ms

Our browser made a total of 123 requests to load all elements on the main page. We found that 6% of them (7 requests) were addressed to the original 51web.com, 46% (57 requests) were made to Spi.cdnhost.cn and 36% (44 requests) were made to Spihome.cdnhost.cn. The less responsive or slowest element that took the longest time to load (20.4 sec) relates to the external source Spi.cdnhost.cn.

Content Size

1.7 MB

After Optimization

1.1 MB

In fact, the total size of 51web.com main page is 1.7 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. 40% of websites need less resources to load. Images take 988.3 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 90.4 kB

Original 113.5 kB
After minification 102.7 kB
After compression 23.2 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. 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 90.4 kB or 80% of the original size.

Image Optimization

-12%

Potential reduce by 114.8 kB

Original 988.3 kB
After minification 873.5 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, 51 Web needs image optimization as it can save up to 114.8 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-69%

Potential reduce by 349.2 kB

Original 506.9 kB
After minification 489.8 kB
After compression 157.6 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 349.2 kB or 69% of the original size.

CSS Optimization

-81%

Potential reduce by 84.9 kB

Original 105.2 kB
After minification 86.3 kB
After compression 20.4 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. 51web.com needs all CSS files to be minified and compressed as it can save up to 84.9 kB or 81% of the original size.

Requests Now

119

After Optimization

The browser has sent 119 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Web. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 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 experience of reading tabular or list data using assistive technology, like a screen reader.

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

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

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

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

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

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 51web.com 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 51web.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

51web.com

Open Graph description is not detected on the main page of 51 Web. 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

成都世纪东方网络通信有限公司-世纪东方-【世纪云】云主机就选世纪云-世纪云主机高安全可用免费试用建站无忧

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

www.51web.com

base.css

common.css

page.css

layer.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

www.51web.com

base.css

common.css

page.css

layer.css

jquery-1.7.1.min.js

jquery.blockUI.js

blockui.js

NavTab.js

jcarousellite_1.0.1.pack.js

jcarousellite_1.0.1c4.js

jquery.SuperSlide.js

scrollDoor.js

validate.js

slider.js

layer.min.js

alert.js

5098.jpg

weixin.jpg

X.gif

loading.gif

Dlbotton.gif

verphone.gif

TanAgree-botton.gif

TanAgree-botton2.gif

gd_ico1.png

04.jpg

buyBotton.gif

xiangqing.gif

087.gif

searbott.gif

5090.jpg

5089.jpg

5088.jpg

5087.jpg

5086.jpg

5798.jpg

5799.jpg

20160115165012583.jpg

20160121145257059.jpg

20141110134946639.jpg

20141110133030061.jpg

20140620144333827.jpg