Tools & Wizards About Us

Report Summary

  • 44

    Performance

    Renders faster than
    63% of other websites

  • 51

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

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

Page Load Speed

11.4 sec in total

First Response

982 ms

Resources Loaded

10.2 sec

Page Rendered

157 ms

About Website

Visit 51web.com now to see the best up-to-date 51 Web content for China and also check out these interesting facts you probably never knew about 51web.com

成都世纪东方网络通信有限公司,世纪东方是基于云计算的互联网应用服务提供商,为中小型企业提供云服务器优惠套餐,免费试用,百万用户正在享受世纪云 '稳定,安全,低成本'的产品服务。

Visit 51web.com

Key Findings

We analyzed 51web.com page load time and found that the first response time was 982 ms and then it took 10.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

51web.com performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.5 s

0/100

10%

LCP (Largest Contentful Paint)

Value18.9 s

0/100

25%

SI (Speed Index)

Value17.8 s

0/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value15.4 s

7/100

10%

Network Requests Diagram

51web.com

982 ms

www.51web.com

715 ms

www.51web.com

1656 ms

base.css

1165 ms

common.css

1176 ms

Our browser made a total of 118 requests to load all elements on the main page. We found that 8% of them (9 requests) were addressed to the original 51web.com, 43% (51 requests) were made to Spihome.cdnhost.cn and 43% (51 requests) were made to Spi.cdnhost.cn. The less responsive or slowest element that took the longest time to load (4.3 sec) relates to the external source Spi.cdnhost.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 115.1 kB (10%)

Content Size

1.1 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of 51web.com main page is 1.1 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. 50% of websites need less resources to load. Images take 992.6 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 85.0 kB

  • Original 106.1 kB
  • After minification 88.3 kB
  • After compression 21.1 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 17.8 kB, which is 17% 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 85.0 kB or 80% of the original size.

Image Optimization

-3%

Potential reduce by 29.8 kB

  • Original 992.6 kB
  • After minification 962.9 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. 51 Web images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 380 B

  • Original 25.4 kB
  • After minification 25.4 kB
  • After compression 25.0 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.

Requests Breakdown

Number of requests can be reduced by 18 (16%)

Requests Now

115

After Optimization

97

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 115 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 16 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

51web.com accessibility score

51

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Tables and lists

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

Impact

Issue

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>).

Internationalization and localization

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

Impact

Issue

High

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

Names and labels

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.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

51web.com best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

51web.com SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Content Best Practices

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

Impact

Issue

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

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: