Tools & Wizards About Us
51idc.com screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 37

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

51idc.com

51IDC 全球数据中心云网算一体化服务商

Page Load Speed

23.6 sec in total

First Response

665 ms

Resources Loaded

22.1 sec

Page Rendered

816 ms

51idc.com screenshot

About Website

Click here to check amazing 51IDC content for China. Otherwise, check out these important facts you probably never knew about 51idc.com

51IDC是中国领先的数据中心服务商,IDC混合云托管平台,致力于为公众和商业领域提供数据中心和云服务,以及高质价优的服务器租用、服务器托管、出海专线、互联网带宽和IT基础架构运维管理服务与解决方案

Visit 51idc.com

Key Findings

We analyzed 51idc.com page load time and found that the first response time was 665 ms and then it took 22.9 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

51idc.com performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value11.8 s

0/100

10%

LCP (Largest Contentful Paint)

Value75.8 s

0/100

25%

SI (Speed Index)

Value28.0 s

0/100

10%

TBT (Total Blocking Time)

Value1,570 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value48.2 s

0/100

10%

Network Requests Diagram

51idc.com

665 ms

www.51idc.com

1177 ms

hm.js

20264 ms

hm.js

20263 ms

25592d133ce046715eb11c1ddbece7fa

1267 ms

Our browser made a total of 100 requests to load all elements on the main page. We found that 68% of them (68 requests) were addressed to the original 51idc.com, 12% (12 requests) were made to Webpage.qidian.qq.com and 6% (6 requests) were made to Bqq.gtimg.com. The less responsive or slowest element that took the longest time to load (20.3 sec) relates to the external source Hm.baidu.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 116.7 kB (5%)

Content Size

2.3 MB

After Optimization

2.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51idc.com main page is 2.3 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. 65% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 31.1 kB

  • Original 42.6 kB
  • After minification 42.5 kB
  • After compression 11.5 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 31.1 kB or 73% of the original size.

Image Optimization

-4%

Potential reduce by 82.6 kB

  • Original 1.9 MB
  • After minification 1.8 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. 51IDC images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 136 B

  • Original 266.6 kB
  • After minification 266.6 kB
  • After compression 266.4 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

-2%

Potential reduce by 2.8 kB

  • Original 114.5 kB
  • After minification 114.5 kB
  • After compression 111.7 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. 51idc.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 33 (36%)

Requests Now

92

After Optimization

59

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51IDC. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

51idc.com

51idc.com

665 ms

www.51idc.com

www.51idc.com

1177 ms

hm.js

hm.js

20264 ms

hm.js

hm.js

20263 ms

25592d133ce046715eb11c1ddbece7fa

25592d133ce046715eb11c1ddbece7fa

1267 ms

466s3py8.js

466s3py8.js

329 ms

c96a1046.e59cb10d.chunk.css

c96a1046.e59cb10d.chunk.css

480 ms

styles.9bd24d5d.chunk.css

styles.9bd24d5d.chunk.css

675 ms

polyfills-b08f93b185299e91a26b.js

polyfills-b08f93b185299e91a26b.js

906 ms

main-5b14e938852789838a28.js

main-5b14e938852789838a28.js

747 ms

webpack-9116aba78a24ef5afcd9.js

webpack-9116aba78a24ef5afcd9.js

747 ms

c96a1046.955cd01b185e91c5e5fc.js

c96a1046.955cd01b185e91c5e5fc.js

748 ms

2f4f694206d85531b178c3095cf77cc639cf59dd.507d1072793fc3def8fe.js

2f4f694206d85531b178c3095cf77cc639cf59dd.507d1072793fc3def8fe.js

902 ms

8b49afa3e940ea092666ed0cde296f2525d1156a.d468ce5e6a96453b1a6f.js

8b49afa3e940ea092666ed0cde296f2525d1156a.d468ce5e6a96453b1a6f.js

928 ms

4a7899a90d7a22a20e163b9cfeac34649f0bc5dc.854dc29aefc243a9c9f0.js

4a7899a90d7a22a20e163b9cfeac34649f0bc5dc.854dc29aefc243a9c9f0.js

1148 ms

8f924c5268c4a00be4d5e059dc97c2e81530143c.13c5ef33a31d363c97ce.js

8f924c5268c4a00be4d5e059dc97c2e81530143c.13c5ef33a31d363c97ce.js

930 ms

styles.532ffed3dc91d499f4c4.js

styles.532ffed3dc91d499f4c4.js

1123 ms

_app-8056933dd8157694aced.js

_app-8056933dd8157694aced.js

1145 ms

6f965551.ef308ef1c991005247f6.js

6f965551.ef308ef1c991005247f6.js

1419 ms

19c82d70e6e9c46d8a806eedc3494d2bbfee2392.a17d02de4bba71e8d6ec.js

19c82d70e6e9c46d8a806eedc3494d2bbfee2392.a17d02de4bba71e8d6ec.js

1170 ms

4e71637b1c130f3672cf6f64e7ab8514424caa6f.5b598ebb2b7c9b507206.js

4e71637b1c130f3672cf6f64e7ab8514424caa6f.5b598ebb2b7c9b507206.js

1354 ms

index-c374dcdba660402676ac.js

index-c374dcdba660402676ac.js

1376 ms

_buildManifest.js

_buildManifest.js

1982 ms

_ssgManifest.js

_ssgManifest.js

1387 ms

banner_nav_01.png

banner_nav_01.png

1223 ms

banner_nav_02.png

banner_nav_02.png

1245 ms

banner_nav_03.png

banner_nav_03.png

1253 ms

banner_nav_04.png

banner_nav_04.png

1287 ms

ic_bare.png

ic_bare.png

1368 ms

ic_ser.png

ic_ser.png

1539 ms

ic_cloudlink.png

ic_cloudlink.png

1539 ms

ic_leased.png

ic_leased.png

1540 ms

ic_bao.png

ic_bao.png

1541 ms

it_b_1.png

it_b_1.png

1843 ms

ic_war.png

ic_war.png

1666 ms

ic_ly.png

ic_ly.png

1695 ms

erp_b_1.png

erp_b_1.png

1932 ms

ic_balance.png

ic_balance.png

1739 ms

ic_data.png

ic_data.png

1853 ms

ic_camera.png

ic_camera.png

1889 ms

ic_cdn.png

ic_cdn.png

1917 ms

edu_b_1.png

edu_b_1.png

1968 ms

ic_global.png

ic_global.png

1947 ms

shop_b_1.png

shop_b_1.png

1928 ms

ic_llqx.png

ic_llqx.png

1733 ms

app_b_1.png

app_b_1.png

1983 ms

eyao_b_1.png

eyao_b_1.png

1999 ms

ic_ddosgf.png

ic_ddosgf.png

1654 ms

game_b_1.png

game_b_1.png

1992 ms

wuliu_b_1.png

wuliu_b_1.png

1779 ms

ic_mtcl.png

ic_mtcl.png

1850 ms

zhibo_b_1.png

zhibo_b_1.png

2008 ms

video_b_1.png

video_b_1.png

1789 ms

footer_icon1.png

footer_icon1.png

1783 ms

footer_icon2.png

footer_icon2.png

1800 ms

pk1.js

pk1.js

465 ms

footer_icon3.png

footer_icon3.png

1649 ms

footer_icon4.png

footer_icon4.png

1768 ms

footer_icon5.png

footer_icon5.png

1770 ms

footer_anchnet.png

footer_anchnet.png

1752 ms

www.anchnet.com

www.anchnet.com

376 ms

footer_ewm_n.jpg

footer_ewm_n.jpg

1619 ms

51idc-white.png

51idc-white.png

1629 ms

ruisu-transparent.png

ruisu-transparent.png

1761 ms

MSP.png

MSP.png

2603 ms

ylj.png

ylj.png

3102 ms

i.js

i.js

14 ms

jsonp

jsonp

1214 ms

getGrayLevel

getGrayLevel

881 ms

1_2_1.png

1_2_1.png

232 ms

dt@2x.png

dt@2x.png

2352 ms

hot_tag.svg

hot_tag.svg

1554 ms

new_tag.svg

new_tag.svg

1567 ms

sale_tag.svg

sale_tag.svg

1711 ms

right_icon.png

right_icon.png

1693 ms

ico_qq.png

ico_qq.png

1664 ms

rightbar-icons.png

rightbar-icons.png

2025 ms

scan.jpg

scan.jpg

1805 ms

trace

trace

1601 ms

pc.html

pc.html

1271 ms

index.html

index.html

1293 ms

trace

trace

1076 ms

initQidianMonitor.js

initQidianMonitor.js

9 ms

instant.js

instant.js

10 ms

qidianMonitor.umd.min.js

qidianMonitor.umd.min.js

48 ms

feedback-1.2.27.js

feedback-1.2.27.js

35 ms

trtc_4.14.4.js

trtc_4.14.4.js

336 ms

chunk-vendors.3a947e0a.css

chunk-vendors.3a947e0a.css

31 ms

pc.736f6799.css

pc.736f6799.css

43 ms

chunk-imsdk.ae0a9363.js

chunk-imsdk.ae0a9363.js

42 ms

chunk-vendors.6399c7ff.js

chunk-vendors.6399c7ff.js

202 ms

pc.9bf0685a.js

pc.9bf0685a.js

315 ms

jquery-1.12.4-fixed.min.js

jquery-1.12.4-fixed.min.js

6 ms

statusManager.js

statusManager.js

16 ms

collect

collect

1157 ms

collect

collect

1147 ms

whitelist

whitelist

1160 ms

amr.d8ebe3b6.js

amr.d8ebe3b6.js

418 ms

whitelist

whitelist

772 ms

icomoon.f4992c50.ttf

icomoon.f4992c50.ttf

727 ms

Accessibility Review

51idc.com accessibility score

37

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.

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

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

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

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

51idc.com best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

51idc.com SEO score

75

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

Mobile Friendly

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/).

Impact

Issue

High

Document doesn't use 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 51idc.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 51idc.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

51idc.com

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