Analyze 코스트코 온라인몰 | 코스트코 코리아

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Page load speed analysis

  • 56/100

    Normal result
  • 6

    Successful tests
  • 2

    Failed tests
  • First response

    1.2 sec

  • Resources loaded

    6.1 sec

  • Page rendered

    407 ms

  • Total page load time

    7.7 sec

Visit now to see the best up-to-date Costco content for South Korea and also check out these interesting facts you probably never knew about

We analyzed page load time and found that the first response time was 1.2 sec and then it took 6.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Page optimization

  • HTML 230.3 kB
    Images 4.8 MB
    Javascripts 680.6 kB
    CSS 534.4 kB

    In fact, the total size of main page is 6.3 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 4.8 MB which makes up the majority of the site volume.

    • Original 230.3 kB
    • After minification 214.1 kB
    • After compression 38.0 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 192.2 kB or 83% of the original size.

    • Original 4.8 MB
    • After optimization 3.2 MB

    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. Obviously, Costco needs image optimization as it can save up to 1.7 MB or 35% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

    • Original 680.6 kB
    • After minification 677.3 kB
    • After compression 215.9 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 464.6 kB or 68% of the original size.

    • Original 534.4 kB
    • After minification 445.6 kB
    • After compression 63.7 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 470.7 kB or 88% of the original size.

Network requests diagram

  • style-min.css
  • 8902787563550.css
  • analyticsmediator.js
  • jquery_extensions-min.js
  • generatedVariables.js
  • bootstrap.min.js
  • acc-min.js
  • buynowaddon.js
  • costco.lib.js
  • ga.js
  • 8830294687774.jpg
  • 8887310614558.jpg
  • 8882002100254.jpg
  • 8887310254110.jpg
  • 8887309893662.jpg
  • 8832405045278.png
  • 8881997119518.png
  • 8869716590622.png
  • 8899676602398.jpg
  • 8899676012574.jpg
  • 8899676962846.jpg
  • 8899677388830.jpg
  • 8899673948190.jpg
  • 8899674275870.jpg
  • 8899677683742.jpg
  • 8899678076958.jpg
  • 8901287936030.jpg
  • 8901287870494.jpg
  • 8899678502942.jpg
  • 8899678928926.jpg
  • 8899679223838.jpg
  • 8899679518750.jpg
  • 8899679813662.jpg
  • 8899680403486.jpg
  • 8899674570782.jpg
  • 8899675127838.jpg
  • 8901450072094.png
  • 8901449777182.png
  • south_korea_flag.png
  • US-flag.gif
  • CN-flag.gif
  • UK-flag.gif
  • MX-flag.gif
  • 8806447448094.png
  • 8853179105310.png
  • 8843741233182.png
  • desktop-cart.png
  • mobile-cart.png
  • icon-search-desktop.png
  • icon-search-mobile.png
  • 8824055070750.png
  • banner-membership.png
  • banner-amex.jpg
  • banner-photocenter.jpg
  • back_to_top_button.png
  • NanumGothic-Regular.woff
  • NanumGothic-Bold.woff
  • glyphicons-halflings-regular.woff
  • 8842827661342.jpg
  • __utm.gif
  • collect
  • element.js
  • postcode.v2.js
  • receipt_link.js
  • kakao.min.js
  • spinner.gif
  • btn_arrow_left.png
  • btn_arrow_right.png
  • 8901032673310.jpg
  • 8823785881630.png
  • 8860396355614.png
  • 8900612292638.jpg
  • 8900606066718.jpg
  • 8900611866654.jpg
  • 8891174912030.jpg
  • 8885814034462.jpg
  • 8900609277982.jpg
  • 8900609769502.jpg
  • 8900610850846.jpg
  • 8900610162718.jpg
  • 8901274173470.jpg
  • 8823786405918.png
  • 8823765958686.png
  • 8900608819230.jpg
  • 8900607279134.jpg
  • 8900608491550.jpg
  • 8900608327710.jpg
  • 8900612587550.jpg
  • 8900606951454.jpg
  • 8900606525470.jpg
  • 8900611342366.jpg
  • 8900607705118.jpg
  • 8902106644510.jpg
  • 8901022351390.jpg
  • 8901023399966.jpg
  • translateelement.css
  • main.js
  • element_main.js
  • translate_24dp.png
  • l
  • cleardot.gif
  • te_ctrl3.gif
  • googlelogo_color_68x28dp.png
  • loading.gif
  • te_bk.gif
  • receipt_link.js

Our browser made a total of 107 requests to load all elements on the main page. We found that 81% of them (87 requests) were addressed to the original, 7% (7 requests) were made to and 2% (2 requests) were made to The less responsive or slowest element that took the longest time to load (3.1 sec) belongs to the original domain

Additional info on


The browser has sent 101 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Costco. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 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 3600
NS 3593
NS 3593
NS 3593

3600 Mname:
Serial: 184
Refresh: 300
Retry: 3600
Expire: 2592000
Minimum-ttl: 3600

Language and encoding

Good result


KO ko language flag


KO ko 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. Our service has detected that Korean is used on the page, and it matches the claimed language. Our system also found out that 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.

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.

Poor result

Visitor World Map

Country of origin for 96.4% of all visits is South Korea. It lies approximately 6830 miles away from the server location (United States) and such a long distance can negatively affect website speed, as it takes some time for data to travel back and forth between those places. That’s why one of the best ways to speed up page load time for the majority of users is moving the server to South Korea or just closer to the user base.

Poor result

Normal result

Social Sharing Optimization

Open Graph data is detected on the main page of Costco. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

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