Analyze 502 Bad Gateway nginx openresty

B2C Equipment Shopping Global Online, One-Stop goods Procurement Service | Include hotel supply,furniture,kitchen,lamp,quotation,Electrical,Ceramic,equipment|Make Business More Reliable!

Page load speed analysis

  • 40/100

    Normal result
  • 6

    Successful tests
  • 2

    Failed tests
  • First response

    9.2 sec

  • Resources loaded

    47.7 sec

  • Page rendered

    387 ms

  • Total page load time

    57.3 sec

Click here to check amazing Shentop content. Otherwise, check out these important facts you probably never knew about

We analyzed page load time and found that the first response time was 9.2 sec and then it took 48.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 36 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Page optimization

  • HTML 49.7 kB
    Images 384.4 kB
    Javascripts 103.2 kB
    CSS 9.0 kB

    In fact, the total size of main page is 546.2 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. 20% of websites need less resources to load. Images take 384.4 kB which makes up the majority of the site volume.

    • Original 49.7 kB
    • After minification 49.2 kB
    • After compression 9.0 kB

    HTML optimization

    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 40.7 kB or 82% of the original size.

    • Original 384.4 kB
    • After optimization 354.5 kB

    Image optimization

    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. Shentop images are well optimized though.

    • Original 103.2 kB
    • After minification 99.7 kB
    • After compression 34.0 kB

    JavaScript optimization

    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 69.2 kB or 67% of the original size.

    • Original 9.0 kB
    • After minification 7.7 kB
    • After compression 2.4 kB

    CSS optimization

    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. needs all CSS files to be minified and compressed as it can save up to 6.6 kB or 74% of the original size.

Network requests diagram

  • ajax.js
  • common.js
  • car.js
  • css_menu.css
  • css_index.css
  • skypeCheck.js
  • logo.jpg
  • scroll.js
  • 005.gif
  • bg_body.jpg
  • skin_index.jpg
  • skype.png
  • icon_more.jpg
  • bg_category_bottom.jpg
  • 1309743814.jpg
  • 1301536342.jpg
  • 1369292768.jpg
  • bnt_find.jpg
  • 1422340311.jpg
  • 1362218970.jpg
  • 1344700814.jpg
  • 1356594261.jpg
  • 1431945360.jpg
  • 1426232427.jpg
  • 1425972890.jpg
  • 1427353617.jpg
  • 1426060702.jpg
  • 1426062883.jpg
  • 1432267868.jpg
  • 1433321365.jpg
  • 1426152875.jpg
  • 1432267485.jpg
  • 1426231794.jpg
  • 1323074007.jpg
  • 1323227654.jpg
  • 1323242580.jpg
  • 1323657928.jpg
  • 1323762220.jpg
  • 1323832300.jpg
  • 1316782803.jpg
  • 1322100484.jpg
  • 1322117760.jpg
  • 1306210127.jpg
  • 1344819368.jpg
  • 1365491803.jpg
  • 1364199534.jpg
  • 1344653612.jpg
  • 1330661958.jpg
  • 2315341.js
  • 5108940.js
  • PayPal_mark_50x34.gif
  • stat.php
  • 1344590903.jpg
  • 1330933305.jpg
  • 1365480883.jpg
  • 1344669052.jpg
  • stat.htm
  • core.php
  • 9.gif
  • 1356404270.jpg
  • 1300842843.jpg
  • 1337656992.jpg
  • 1343298730.jpg
  • app.gif
  • button_old_41.gif
  • 1310370836.jpg
  • icon_0.gif
  • ga.js
  • __utm.gif
  • 1300862801.jpg
  • 1329122491.jpg
  • 1329183666.jpg
  • 1340811085.jpg
  • 1426239578.jpg
  • 1337742987.jpg
  • 1337782029.jpg
  • 1338025853.jpg
  • 1338026228.jpg
  • 1337676499.jpg
  • 1337842486.jpg
  • 1337843568.jpg
  • 1337847990.jpg
  • 1337928947.jpg
  • 1337935401.jpg
  • 1334212840.jpg
  • 1334390580.jpg
  • 1334652660.jpg
  • 1337413936.jpg
  • 1337414182.jpg
  • 1337572886.jpg
  • 1337583749.jpg
  • 1337590577.jpg
  • 1337650562.jpg
  • 1337651448.jpg

Our browser made a total of 96 requests to load all elements on the main page. We found that 85% of them (82 requests) were addressed to the original, 2% (2 requests) were made to and 2% (2 requests) were made to The less responsive or slowest element that took the longest time to load (20.1 sec) belongs to the original domain

Additional info on


The browser has sent 57 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Shentop. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.









Possible request optimization











Normal result

IP address

This IP address is dedicated to This is the best domain hosting practice .

Normal result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 60
NS 60
NS 60

60 Mname:
Serial: 2020022415
Refresh: 3600
Retry: 1200
Expire: 86400
Minimum-ttl: 360

Language and encoding

Normal result


N/A  language flag


N/A  language flag





Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 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 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.

HTTPS certificate

SSL Certificate has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Normal result

Visitor World Map

The server of is located in United States, but, unfortunately, we cannot identify the countries where the visitors come from and thus it’s impossible to define if the distance can potentially affect the page load time.

Good result

Poor result

Social Sharing Optimization

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

Share this report in social media

Analyze another website