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51back.cn screenshot

Report Summary

  • 0

    Performance

  • 0

    Accessibility

  • 0

    Best Practices

  • 0

    SEO

51back.cn

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Page Load Speed

49.6 sec in total

First Response

2.7 sec

Resources Loaded

46.5 sec

Page Rendered

323 ms

51back.cn screenshot

About Website

Click here to check amazing 51 Back content. Otherwise, check out these important facts you probably never knew about 51back.cn

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Visit 51back.cn

Key Findings

We analyzed 51back.cn page load time and found that the first response time was 2.7 sec and then it took 46.9 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 9 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

51back.cn performance score

0

Network Requests Diagram

51back.cn

2737 ms

css.css

2518 ms

jquery-1.9.1.min.js

20228 ms

js.js

3190 ms

popwin.js

1961 ms

Our browser made a total of 50 requests to load all elements on the main page. We found that all of those requests were addressed to 51back.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (20.2 sec) belongs to the original domain 51back.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 122.8 kB (35%)

Content Size

350.7 kB

After Optimization

227.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51back.cn main page is 350.7 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. 15% of websites need less resources to load. Images take 291.0 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 20.2 kB

  • Original 24.5 kB
  • After minification 17.5 kB
  • After compression 4.4 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 7.1 kB, which is 29% 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 20.2 kB or 82% of the original size.

Image Optimization

-25%

Potential reduce by 72.9 kB

  • Original 291.0 kB
  • After minification 218.2 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, 51 Back needs image optimization as it can save up to 72.9 kB or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-85%

Potential reduce by 17.8 kB

  • Original 21.0 kB
  • After minification 13.5 kB
  • After compression 3.1 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 17.8 kB or 85% of the original size.

CSS Optimization

-84%

Potential reduce by 12.0 kB

  • Original 14.2 kB
  • After minification 11.6 kB
  • After compression 2.2 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. 51back.cn needs all CSS files to be minified and compressed as it can save up to 12.0 kB or 84% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

39

After Optimization

39

  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Back. According to our analytics all requests are already optimized.

Network Requests Diagram

51back.cn

51back.cn

2737 ms

css.css

css.css

2518 ms

jquery-1.9.1.min.js

jquery-1.9.1.min.js

20228 ms

js.js

js.js

3190 ms

popwin.js

popwin.js

1961 ms

body_bg.gif

body_bg.gif

1244 ms

top_bg.gif

top_bg.gif

18229 ms

logo_1.png

logo_1.png

6282 ms

menu_bg.png

menu_bg.png

1967 ms

menu_1.png

menu_1.png

1083 ms

menu_2.png

menu_2.png

1443 ms

menu_3.png

menu_3.png

5163 ms

menu_4.png

menu_4.png

1802 ms

menu_5.png

menu_5.png

2162 ms

menu_6.png

menu_6.png

5310 ms

menu_7.png

menu_7.png

2527 ms

menu_8.png

menu_8.png

2888 ms

banner_bg.jpg

banner_bg.jpg

19992 ms

banner_down.png

banner_down.png

10888 ms

con_bg.gif

con_bg.gif

6872 ms

ad_bg.jpg

ad_bg.jpg

7971 ms

news_more.png

news_more.png

8450 ms

login_user.png

login_user.png

12030 ms

login_pass.png

login_pass.png

8451 ms

login_btn_1.png

login_btn_1.png

9572 ms

reg_btn_1.png

reg_btn_1.png

9424 ms

help.png

help.png

11830 ms

goods_top.png

goods_top.png

10683 ms

2014061314491313.jpg

2014061314491313.jpg

13891 ms

2014061314493955.jpg

2014061314493955.jpg

13334 ms

2014061314503216.jpg

2014061314503216.jpg

16366 ms

s_2016010215001435.jpg

s_2016010215001435.jpg

13477 ms

s_2016010215003503.png

s_2016010215003503.png

15391 ms

fkbn.jpg

fkbn.jpg

16599 ms

ywzb.jpg

ywzb.jpg

16534 ms

shz.jpg

shz.jpg

19518 ms

lkpy.jpg

lkpy.jpg

19987 ms

jcby.jpg

jcby.jpg

19989 ms

ATT.png

ATT.png

17071 ms

news_top_bg.png

news_top_bg.png

18962 ms

news_top.png

news_top.png

18674 ms

news_con_bg.gif

news_con_bg.gif

19910 ms

login_bg.png

login_bg.png

19751 ms

goods_con.png

goods_con.png

18626 ms

goods.gif

goods.gif

18779 ms

rank_bg.png

rank_bg.png

20026 ms

game_top.png

game_top.png

19830 ms

game_con.png

game_con.png

20047 ms

link_bg.png

link_bg.png

18747 ms

bom_bg.jpg

bom_bg.jpg

19830 ms

SEO Factors

51back.cn SEO score

0

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51back.cn can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that 51back.cn 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

51back.cn

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