Tools & Wizards About Us
51job.com screenshot

Report Summary

  • 24

    Performance

    Renders faster than
    44% of other websites

  • 47

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    86% of websites

  • 78

    SEO

    Google-friendlier than
    48% of websites

51job.com

招聘网_人才网_找工作_求职_上前程无忧

Page Load Speed

49.1 sec in total

First Response

9 sec

Resources Loaded

39.6 sec

Page Rendered

480 ms

51job.com screenshot

About Website

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

前程无忧人才网面向全国,提供2022准确的招聘网站信息,为企业和求职者提供人才招聘、求职、找工作、培训等在内的全方位的人力资源服务,更多求职找工作信息尽在前程无忧!

Visit 51job.com

Key Findings

We analyzed 51job.com page load time and found that the first response time was 9 sec and then it took 40.1 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.

Performance Metrics

51job.com performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value12.8 s

0/100

25%

SI (Speed Index)

Value19.6 s

0/100

10%

TBT (Total Blocking Time)

Value890 ms

32/100

30%

CLS (Cumulative Layout Shift)

Value0.088

93/100

15%

TTI (Time to Interactive)

Value15.0 s

8/100

10%

Network Requests Diagram

51job.com

8977 ms

style.css

3408 ms

logo.css

2799 ms

2012_index.css

2806 ms

jQuery.js

4274 ms

Our browser made a total of 106 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original 51job.com, 53% (56 requests) were made to Img01.51jobcdn.com and 24% (25 requests) were made to Img03.51jobcdn.com. The less responsive or slowest element that took the longest time to load (16.7 sec) relates to the external source Img03.51jobcdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 884.1 kB (63%)

Content Size

1.4 MB

After Optimization

518.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51job.com main page is 1.4 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. 35% of websites need less resources to load. Javascripts take 891.5 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 170.2 kB

  • Original 201.4 kB
  • After minification 196.7 kB
  • After compression 31.2 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 170.2 kB or 84% of the original size.

Image Optimization

-10%

Potential reduce by 25.4 kB

  • Original 241.9 kB
  • After minification 216.5 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. 51 Job images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 630.5 kB

  • Original 891.5 kB
  • After minification 822.4 kB
  • After compression 261.0 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 630.5 kB or 71% of the original size.

CSS Optimization

-86%

Potential reduce by 58.1 kB

  • Original 67.7 kB
  • After minification 52.4 kB
  • After compression 9.6 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. 51job.com needs all CSS files to be minified and compressed as it can save up to 58.1 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 40 (38%)

Requests Now

105

After Optimization

65

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 105 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Job. 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 as a result speed up the page load time.

Network Requests Diagram

51job.com

51job.com

8977 ms

style.css

style.css

3408 ms

logo.css

logo.css

2799 ms

2012_index.css

2012_index.css

2806 ms

jQuery.js

jQuery.js

4274 ms

JsBase.js

JsBase.js

4841 ms

chkSignIn.js

chkSignIn.js

3149 ms

login.js

login.js

4002 ms

Base.js

Base.js

3892 ms

Base.ZzLayer.js

Base.ZzLayer.js

3892 ms

Base.ZzLayer.ExtZzLayer.js

Base.ZzLayer.ExtZzLayer.js

3893 ms

Base.ZzLayer.ExtZzLayer.JobLayer.js

Base.ZzLayer.ExtZzLayer.JobLayer.js

4342 ms

Base.ZzLayer.ExtZzLayer.JobLayer.JobareaLayer.js

Base.ZzLayer.ExtZzLayer.JobLayer.JobareaLayer.js

4326 ms

jobarea_array_c.js

jobarea_array_c.js

4326 ms

switchKeywordTypeIndex.js

switchKeywordTypeIndex.js

4340 ms

RefreshResume.js

RefreshResume.js

4703 ms

form.js

form.js

9330 ms

iCom20080826.js

iCom20080826.js

7434 ms

quickAndKeywordSearch.js

quickAndKeywordSearch.js

4823 ms

jquery.lazyload.js

jquery.lazyload.js

4843 ms

index_2012.js

index_2012.js

5140 ms

writeflash.js

writeflash.js

920 ms

top_bg.gif

top_bg.gif

4329 ms

pfizer0222_8710.gif

pfizer0222_8710.gif

12316 ms

info_new.gif

info_new.gif

3546 ms

lvdi0216_8871wh.gif

lvdi0216_8871wh.gif

10985 ms

debang0308a_7223wh.gif

debang0308a_7223wh.gif

11784 ms

huaixn1119a_7162wh.gif

huaixn1119a_7162wh.gif

11788 ms

boshib0329_7099wh.gif

boshib0329_7099wh.gif

11800 ms

baoxian0426b_8748wh.gif

baoxian0426b_8748wh.gif

11982 ms

logo2009.gif

logo2009.gif

4356 ms

top_language_ge.gif

top_language_ge.gif

4355 ms

top_ico_mobile.gif

top_ico_mobile.gif

4384 ms

263_44.jpg

263_44.jpg

5487 ms

263_44.gif

263_44.gif

5429 ms

263-44.gif

263-44.gif

4995 ms

263_44.gif

263_44.gif

5045 ms

263_44.gif

263_44.gif

5047 ms

263_44.gif

263_44.gif

5111 ms

main_login_btn.gif

main_login_btn.gif

5331 ms

main_ehire_btn.gif

main_ehire_btn.gif

5396 ms

main_search_btn.gif

main_search_btn.gif

6364 ms

key.gif

key.gif

5863 ms

t01.gif

t01.gif

7124 ms

t02.gif

t02.gif

5749 ms

t03.gif

t03.gif

8236 ms

t04.gif

t04.gif

5862 ms

icon_close.gif

icon_close.gif

6109 ms

spear.gif

spear.gif

6362 ms

spear.gif

spear.gif

6233 ms

ad_b_title.gif

ad_b_title.gif

6467 ms

ad_c_title.gif

ad_c_title.gif

6597 ms

info_new.gif

info_new.gif

6855 ms

cuad.gif

cuad.gif

6709 ms

shca_cc.gif

shca_cc.gif

6821 ms

GA_Logo2.gif

GA_Logo2.gif

6968 ms

shwjwl110.gif

shwjwl110.gif

7425 ms

certcx.gif

certcx.gif

7181 ms

shjubao.gif

shjubao.gif

7229 ms

120x250.gif

120x250.gif

7730 ms

120-250.gif

120-250.gif

8123 ms

filter-school.png

filter-school.png

7535 ms

filter-all.png

filter-all.png

7732 ms

top_logo_arc.gif

top_logo_arc.gif

7783 ms

bg.gif

bg.gif

7889 ms

xingye0331b_7145wh.gif

xingye0331b_7145wh.gif

12613 ms

moshad0330_7336wh.gif

moshad0330_7336wh.gif

13178 ms

chinaMobile0203_7409wh.gif

chinaMobile0203_7409wh.gif

12673 ms

pingangj0130_8827wh.gif

pingangj0130_8827wh.gif

13001 ms

maigela0213_8669wh.gif

maigela0213_8669wh.gif

13123 ms

sany0331_8167.gif

sany0331_8167.gif

13748 ms

musi0331a_7088wh.gif

musi0331a_7088wh.gif

14721 ms

dongfeng0407_7202wh.gif

dongfeng0407_7202wh.gif

14452 ms

yx0106_7253wh.gif

yx0106_7253wh.gif

13511 ms

minhang1113_7096wh.gif

minhang1113_7096wh.gif

14167 ms

yulong0728a_7152wh.gif

yulong0728a_7152wh.gif

13693 ms

xinhaitian0401b_7183wh.gif

xinhaitian0401b_7183wh.gif

14572 ms

meidixi0401_7367wh.gif

meidixi0401_7367wh.gif

14236 ms

dazhong1231_7410wh.gif

dazhong1231_7410wh.gif

15303 ms

bmw0310a_7223wh.gif

bmw0310a_7223wh.gif

15206 ms

anfeisi0316_7162wh.gif

anfeisi0316_7162wh.gif

16747 ms

jiaosuo0325_7430wh.gif

jiaosuo0325_7430wh.gif

15523 ms

yijia0302_7416wh.gif

yijia0302_7416wh.gif

15616 ms

yiqi0321_7407wh.gif

yiqi0321_7407wh.gif

15228 ms

main_bg.gif

main_bg.gif

4158 ms

main_login_input_bg.gif

main_login_input_bg.gif

4893 ms

main_login_operate_bg.gif

main_login_operate_bg.gif

3788 ms

search_tab_sel.gif

search_tab_sel.gif

3881 ms

search_tab.gif

search_tab.gif

3484 ms

search_input.gif

search_input.gif

3447 ms

search_list.gif

search_list.gif

3634 ms

gray_bg02.gif

gray_bg02.gif

3519 ms

module_title_grey.gif

module_title_grey.gif

3479 ms

info_new.gif

info_new.gif

3453 ms

module_title_grey2.gif

module_title_grey2.gif

3410 ms

module_title_blue.gif

module_title_blue.gif

4510 ms

bottombg1.gif

bottombg1.gif

3375 ms

20111231gongshang.gif

20111231gongshang.gif

3278 ms

grey.gif

grey.gif

4335 ms

965-60.gif

965-60.gif

4227 ms

317_60.jpg

317_60.jpg

12338 ms

ad_more.gif

ad_more.gif

3109 ms

title_layer_yd.gif

title_layer_yd.gif

3379 ms

title_layer.gif

title_layer.gif

3338 ms

kwdAjaxIframe.html

kwdAjaxIframe.html

3373 ms

jQuery.js

jQuery.js

959 ms

Accessibility Review

51job.com accessibility score

47

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.

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

Links do not have a discernible name

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

51job.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

51job.com SEO score

78

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 uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51job.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 51job.com main page’s claimed encoding is gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

51job.com

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