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51sf.com screenshot

Report Summary

  • 69

    Performance

    Renders faster than
    81% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

51sf.com

The domain name 51sf.com is for sale

Page Load Speed

26.5 sec in total

First Response

1.3 sec

Resources Loaded

24.9 sec

Page Rendered

330 ms

51sf.com screenshot

About Website

Click here to check amazing 51 Sf content. Otherwise, check out these important facts you probably never knew about 51sf.com

The domain name 51sf.com is for sale. Make an offer or buy it now at a set price.

Visit 51sf.com

Key Findings

We analyzed 51sf.com page load time and found that the first response time was 1.3 sec and then it took 25.2 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

51sf.com performance score

69

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

67/100

25%

SI (Speed Index)

Value3.0 s

93/100

10%

TBT (Total Blocking Time)

Value460 ms

62/100

30%

CLS (Cumulative Layout Shift)

Value0.029

100/100

15%

TTI (Time to Interactive)

Value8.0 s

42/100

10%

Network Requests Diagram

51sf.com

1262 ms

style.css

2918 ms

8enet.css

2926 ms

public.css

2845 ms

jquery.min.js

3624 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original 51sf.com, 76% (29 requests) were made to G-m315.com and 5% (2 requests) were made to Jxdushi.com. The less responsive or slowest element that took the longest time to load (20 sec) relates to the external source Jxdushi.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 154.2 kB (39%)

Content Size

399.2 kB

After Optimization

245.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51sf.com main page is 399.2 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. Only 10% of websites need less resources to load. Images take 202.2 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 55.4 kB

  • Original 62.4 kB
  • After minification 53.5 kB
  • After compression 7.0 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 8.9 kB, which is 14% 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 55.4 kB or 89% of the original size.

Image Optimization

-4%

Potential reduce by 8.4 kB

  • Original 202.2 kB
  • After minification 193.9 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 Sf images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 70.2 kB

  • Original 108.9 kB
  • After minification 107.1 kB
  • After compression 38.7 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 70.2 kB or 65% of the original size.

CSS Optimization

-79%

Potential reduce by 20.2 kB

  • Original 25.6 kB
  • After minification 22.4 kB
  • After compression 5.4 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. 51sf.com needs all CSS files to be minified and compressed as it can save up to 20.2 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (26%)

Requests Now

34

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Sf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

51sf.com

51sf.com

1262 ms

style.css

style.css

2918 ms

8enet.css

8enet.css

2926 ms

public.css

public.css

2845 ms

jquery.min.js

jquery.min.js

3624 ms

jquery.sgallery.js

jquery.sgallery.js

2957 ms

search_common.js

search_common.js

2901 ms

1413250879410.jpg

1413250879410.jpg

20017 ms

a_06.jpg

a_06.jpg

562 ms

thumb_310_180_20150720102356559.jpg

thumb_310_180_20150720102356559.jpg

288 ms

thumb_80_80_20150720102356559.jpg

thumb_80_80_20150720102356559.jpg

402 ms

a_15.jpg

a_15.jpg

491 ms

e553.jpg

e553.jpg

394 ms

34.jpg

34.jpg

502 ms

a81.jpg

a81.jpg

587 ms

111.jpg

111.jpg

786 ms

a82.jpg

a82.jpg

763 ms

right.jpg

right.jpg

956 ms

255.jpg

255.jpg

1094 ms

thumb_132_94_20150720102356559.jpg

thumb_132_94_20150720102356559.jpg

967 ms

20111022121536345.jpg

20111022121536345.jpg

1048 ms

1413251233943.jpg

1413251233943.jpg

20014 ms

index.php

index.php

1160 ms

a_10.jpg

a_10.jpg

1083 ms

a_24.jpg

a_24.jpg

1201 ms

a1.jpg

a1.jpg

1216 ms

a_26.jpg

a_26.jpg

1293 ms

a_27.jpg

a_27.jpg

1339 ms

a_17.jpg

a_17.jpg

1311 ms

a_42.jpg

a_42.jpg

1382 ms

num_list.png

num_list.png

1443 ms

global_caption3_bg.gif

global_caption3_bg.gif

1429 ms

z_stat.php

z_stat.php

1558 ms

stat.htm

stat.htm

579 ms

core.php

core.php

1218 ms

9.gif

9.gif

907 ms

pic.gif

pic.gif

792 ms

app.gif

app.gif

868 ms

Accessibility Review

51sf.com accessibility score

91

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.

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

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

Links do not have a discernible name

Best Practices

51sf.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

51sf.com SEO score

93

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

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    GBK

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51sf.com can be misinterpreted by Google and other search engines. Our service has detected that English 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 51sf.com main page’s claimed encoding is gbk. 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

51sf.com

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