CODECHEF.COM Programming Competition,Programming Contest,Online Computer Programming

codechef.com Website Information

Daily Unique Visits: 234,947

Daily Page Views: 1,879,576

Income Per Day: $1,880

Estimated Value: $2,030,400

This website is located in United States and is using following IP address 54.210.252.68. See the complete list of popular websites hosted in United States.

codechef.com is registered under .COM top-level domain. Please check other sites in .COM zone.

Website codechef.com is using the following name servers:

  • ns-1990.awsdns-56.co.uk
  • ns-275.awsdns-34.com
  • ns-741.awsdns-28.net
  • ns-1074.awsdns-06.org

and is probably hosted by AMAZON-AES - Amazon.com, Inc., US. See the full list of other websites hosted by AMAZON-AES - Amazon.com, Inc., US.

The highest website codechef.com position in Alexa rank database was 2152 and the lowest rank position was 33440. Current position of codechef.com in Alexa rank database is 6486.

Desktop speed score of codechef.com (71/100) is better than the results of 54.13% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of codechef.com (65/100) is better than the results of 25.99% of other sites and means that the page is not mobile-friendly.

Mobile speed score of codechef.com (55/100) is better than the results of 42.45% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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codechef.com Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.


codechef.com whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.


Domain Name: CODECHEF.COM
Registry Domain ID: 155708899_DOMAIN_COM-VRSN
Registrar WHOIS Server: Whois.bigrock.com
Registrar URL: http://www.bigrock.com
Updated Date: 2013-05-13T08:07:02Z
Creation Date: 2005-05-08T18:25:45Z
Registry Expiry Date: 2020-11-24T09:12:07Z
Registrar: BigRock Solutions Limited
Registrar IANA ID: 1495
Registrar Abuse Contact Email: abuse-contact@publicdomainregistry.com
Registrar Abuse Contact Phone: +1.2013775952
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS-1074.AWSDNS-06.ORG
Name Server: NS-1990.AWSDNS-56.CO.UK
Name Server: NS-275.AWSDNS-34.COM
Name Server: NS-741.AWSDNS-28.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2018-06-28T23:06:51Z

codechef.com server information

Servers Location

codechef.com desktop page speed rank

Last tested: 2016-08-03


Desktop Speed Medium
71/100

codechef.com Desktop Speed Test Quick Summary


priority - 17 Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 162.2KiB (23% reduction).

Losslessly compressing https://s3.amazonaws.com/codechef_shared/download/…0PM%206.39.18%20PM.jpg could save 32.8KiB (13% reduction).
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priority - 10 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 20 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://www.codechef.com/sites/all/modules/jquery_…eplace/jquery.min.js?H
https://www.codechef.com/misc/drupal.js?H
https://www.codechef.com/misc/jquery-popup-overlay/popupoverlay.js?H
https://www.codechef.com/em/libs/common/common.js?H
https://www.codechef.com/sites/all/modules/codeche…s/js/localStorage.js?H
https://www.codechef.com/sites/all/modules/codeche…ons/js/keybinding.js?H
https://www.codechef.com/sites/all/modules/codeche…echefGenericModal.js?H
https://www.codechef.com/sites/all/modules/codeche…_common_functions.js?H
https://www.codechef.com/sites/all/modules/codeche…todo_notification.js?H
https://www.codechef.com/sites/all/modules/fbmod/js/fb_sdk.js?H
https://www.codechef.com/sites/all/modules/nice_menus/nice_menus.js?H
https://www.codechef.com/sites/all/modules/tableof…uery.scrollTo-min.js?H
https://www.codechef.com/sites/all/modules/tableof…y.localscroll-min.js?H
https://www.codechef.com/sites/all/modules/tableof…s/tableofcontents.js?H
https://www.codechef.com/em/libs/jquery/jquery.tools.js
https://www.codechef.com/bower_components/jquery/dist/jquery.min.js
https://www.codechef.com/bower_components/foundation/js/foundation.min.js
https://www.codechef.com/sites/all/themes/abessive…js/owl.carousel.min.js
https://www.codechef.com/sites/all/themes/abessive/js/app.js
https://www.codechef.com/misc/jquery-video-lightni…video-lightning.min.js

Optimize CSS Delivery of the following:

https://www.codechef.com/sites/all/themes/abessive…s/css/owl.carousel.css
https://www.codechef.com/sites/all/themes/abessive/css/app.css

priority - 7 Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://codechef.com/
http://www.codechef.com/
https://www.codechef.com/

priority - 4 Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://s3.amazonaws.com/codechef_shared/sites/all…mages/image-sprite.png (expiration not specified)
https://www.codechef.com/api/user/campaigns (expiration not specified)
https://www.codechef.com/todo/notification/count (expiration not specified)
https://static.hotjar.com/c/hotjar-167687.js?sv=5 (60 seconds)
https://connect.facebook.net/en_US/sdk.js (20 minutes)
https://beacon.errorception.com/4e7c8fce06a9ab05530008e5.js (60 minutes)
https://www.google.com/jsapi (60 minutes)
https://ssl.google-analytics.com/ga.js (2 hours)

priority - 2 Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 21.7KiB (66% reduction).

Compressing https://staticxx.facebook.com/connect/xd_arbiter/r…5EtQ5qmD.js?version=42 could save 21.7KiB (66% reduction).

codechef.com Desktop Resource Breakdown

Total Resources94
Number of Hosts16
Static Resources62
JavaScript Resources33
CSS Resources5

codechef.com mobile page speed rank

Last tested: 2016-08-03


Mobile Speed Bad
55/100

codechef.com Mobile Speed Test Quick Summary


priority - 40 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 20 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://www.codechef.com/sites/all/modules/jquery_…eplace/jquery.min.js?H
https://www.codechef.com/misc/drupal.js?H
https://www.codechef.com/misc/jquery-popup-overlay/popupoverlay.js?H
https://www.codechef.com/em/libs/common/common.js?H
https://www.codechef.com/sites/all/modules/codeche…s/js/localStorage.js?H
https://www.codechef.com/sites/all/modules/codeche…ons/js/keybinding.js?H
https://www.codechef.com/sites/all/modules/codeche…echefGenericModal.js?H
https://www.codechef.com/sites/all/modules/codeche…_common_functions.js?H
https://www.codechef.com/sites/all/modules/codeche…todo_notification.js?H
https://www.codechef.com/sites/all/modules/fbmod/js/fb_sdk.js?H
https://www.codechef.com/sites/all/modules/nice_menus/nice_menus.js?H
https://www.codechef.com/sites/all/modules/tableof…uery.scrollTo-min.js?H
https://www.codechef.com/sites/all/modules/tableof…y.localscroll-min.js?H
https://www.codechef.com/sites/all/modules/tableof…s/tableofcontents.js?H
https://www.codechef.com/em/libs/jquery/jquery.tools.js
https://www.codechef.com/bower_components/jquery/dist/jquery.min.js
https://www.codechef.com/bower_components/foundation/js/foundation.min.js
https://www.codechef.com/sites/all/themes/abessive…js/owl.carousel.min.js
https://www.codechef.com/sites/all/themes/abessive/js/app.js
https://www.codechef.com/misc/jquery-video-lightni…video-lightning.min.js

Optimize CSS Delivery of the following:

https://www.codechef.com/sites/all/themes/abessive…s/css/owl.carousel.css
https://www.codechef.com/sites/all/themes/abessive/css/app.css

priority - 26 Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://codechef.com/
http://www.codechef.com/
https://www.codechef.com/

priority - 17 Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 162.2KiB (23% reduction).

Losslessly compressing https://s3.amazonaws.com/codechef_shared/download/…0PM%206.39.18%20PM.jpg could save 32.8KiB (13% reduction).
Losslessly compressing https://s3.amazonaws.com/codechef_shared/download/HP-August-LC.jpg could save 30.6KiB (12% reduction).
Losslessly compressing https://s3.amazonaws.com/codechef_shared/sites/all…mages/directi-logo.png could save 16.5KiB (38% reduction).
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Losslessly compressing https://s3.amazonaws.com/codechef_shared/sites/all…s/icon-arrow-right.png could save 14.5KiB (97% reduction).
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Losslessly compressing https://s3.amazonaws.com/codechef_shared/sites/all…me-slider-practice.jpg could save 13KiB (44% reduction).
Losslessly compressing https://s3.amazonaws.com/codechef_shared/sites/all…ster/images/google.png could save 4.3KiB (47% reduction).
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Losslessly compressing https://s3.amazonaws.com/codechef_shared/sites/all…sidebar-gfg-header.png could save 1.1KiB (20% reduction).

priority - 5 Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://s3.amazonaws.com/codechef_shared/sites/all…mages/image-sprite.png (expiration not specified)
https://www.codechef.com/api/user/campaigns (expiration not specified)
https://static.hotjar.com/c/hotjar-167687.js?sv=5 (60 seconds)
https://connect.facebook.net/en_US/sdk.js (20 minutes)
https://beacon.errorception.com/4e7c8fce06a9ab05530008e5.js (60 minutes)
https://www.google.com/jsapi (60 minutes)
https://ssl.google-analytics.com/ga.js (2 hours)

priority - 2 Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 21.7KiB (66% reduction).

Compressing https://staticxx.facebook.com/connect/xd_arbiter/r…5EtQ5qmD.js?version=42 could save 21.7KiB (66% reduction).

codechef.com Mobile Resource Breakdown

Total Resources94
Number of Hosts16
Static Resources61
JavaScript Resources32
CSS Resources5

codechef.com mobile page usability

Last tested: 2016-08-03


Mobile Usability Medium
65/100

codechef.com Mobile Usability Test Quick Summary


priority - 38 Use legible font sizes

The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

Forgot Password renders only 4 pixels tall (10 CSS pixels).

New User renders only 5 pixels tall (12 CSS pixels).

PRACTICE and 2 others render only 5 pixels tall (14 CSS pixels).

COMMUNITY and 2 others render only 4 pixels tall (11 CSS pixels).

Compete agains…f every month. and 2 others render only 5 pixels tall (12 CSS pixels).

Practice renders only 5 pixels tall (14 CSS pixels).

August Challenge 2016 and 2 others render only 5 pixels tall (14 CSS pixels).

New to Programming renders only 5 pixels tall (14 CSS pixels).

and don't know where to start? renders only 5 pixels tall (14 CSS pixels).

Start Here renders only 5 pixels tall (12 CSS pixels).

Recent Blog Posts and 5 others render only 7 pixels tall (17 CSS pixels).

August Challenge 2016 renders only 5 pixels tall (14 CSS pixels).

14 and 3 others render only 6 pixels tall (16 CSS pixels).

Days and 3 others render only 5 pixels tall (12 CSS pixels).

You can view a…em submissions and 1 others render only 5 pixels tall (13 CSS pixels).

here and 1 others render only 5 pixels tall (13 CSS pixels).

Join us and help India win the and 1 others render only 5 pixels tall (13 CSS pixels).

Group For C++/…ython Students and 10 others render only 5 pixels tall (13 CSS pixels).

17.6K and 9 others render only 7 pixels tall (18 CSS pixels).

views and 9 others render only 5 pixels tall (12 CSS pixels).

117 and 9 others render only 5 pixels tall (13 CSS pixels).

2016-08-03 23:59:17 and 9 others render only 4 pixels tall (11 CSS pixels).

joker_007coder and 9 others render only 5 pixels tall (12 CSS pixels).

View and 9 others render only 4 pixels tall (10 CSS pixels).

renders only 5 pixels tall (13 CSS pixels).

14 and 3 others render only 5 pixels tall (13 CSS pixels).

and 2 others render only 5 pixels tall (13 CSS pixels).

The SnackDown…unicated soon. renders only 5 pixels tall (12 CSS pixels).

Aug and 9 others render only 4 pixels tall (11 CSS pixels).

Lectures from…ming Camp 2016 and 4 others render only 5 pixels tall (12 CSS pixels).

CodeChef renders only 7 pixels tall (18 CSS pixels).

392,722 likes renders only 5 pixels tall (12 CSS pixels).

Like Page renders only 5 pixels tall (12 CSS pixels).

Share renders only 4 pixels tall (11 CSS pixels).

Be the first o…s to like this renders only 5 pixels tall (12 CSS pixels).

CodeChef is a…ming community renders only 4 pixels tall (11 CSS pixels).

About CodeChef renders only 4 pixels tall (11 CSS pixels).

Programming Languages and 4 others render only 4 pixels tall (11 CSS pixels).

In order to re…in an email to and 2 others render only 4 pixels tall (11 CSS pixels).

159.148.27.100, 66.249.93.86 and 6 others render only 4 pixels tall (11 CSS pixels).

Practice Section and 2 others render only 5 pixels tall (13 CSS pixels).

- A Place to h…amming Skills' and 2 others render only 5 pixels tall (13 CSS pixels).

judge accepts…r the multiple and 15 others render only 5 pixels tall (12 CSS pixels).

computer programming skills and 12 others render only 5 pixels tall (12 CSS pixels).

Programming Tools and 2 others render only 5 pixels tall (13 CSS pixels).
Upcoming Coding Contests and 15 others render only 5 pixels tall (12 CSS pixels).
Domain Registration in India and 1 others render only 5 pixels tall (12 CSS pixels).
powered by BigRock and 1 others render only 4 pixels tall (11 CSS pixels).

priority - 10 Configure the viewport

Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

priority - 8 Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <input id="edit-pass" type="password" name="pass" class="form-text required new-input"> is close to 1 other tap targets.

The tap target <a href="/user/password">Forgot Password</a> is close to 2 other tap targets.

The tap target <a id="button_google" class="icon-social oa…-small connect"> is close to 1 other tap targets.

The tap target <a id="button_github" class="icon-social oa…-small connect"> is close to 2 other tap targets.

The tap target <a id="button_facebook" class="icon-social oa…-small connect"> is close to 1 other tap targets.

The tap target <a href="/problems/school">PRACTICE</a> and 2 others are close to other tap targets.

The tap target <a href="/community">COMMUNITY</a> and 2 others are close to other tap targets.

The tap target <div id="home-slider-dots" class="owl-dots">Practice…Performance</div> is close to 1 other tap targets.

The tap target <div class="owl-prev">prev</div> is close to 1 other tap targets.

The tap target <div class="owl-next">next</div> is close to 1 other tap targets.

The tap target <a href="/getting-started" class="button blue">Start Here</a> is close to 1 other tap targets.

The tap target <a href="https://www.fa…k.com/CodeChef" class="fb">Facebook</a> is close to 2 other tap targets.

The tap target <a href="https://twitter.com/CodeChef" class="tw">Twitter</a> is close to 3 other tap targets.

The tap target <a href="https://plus.g…codechef/posts" class="gp">Google+</a> is close to 3 other tap targets.

The tap target <a href="https://www.yo…dechefofficial" class="yt">YouTube</a> is close to 3 other tap targets.

The tap target <a href="https://www.qu…topic/CodeChef" class="qu">Quora</a> is close to 2 other tap targets.

The tap target <img src="https://sconte…24&amp;oe=58142CD3" class="_1drn _-s img"> is close to 1 other tap targets.

The tap target <a href="https://m.face…odechef.com%2F" class="link"></a> and 5 others are close to other tap targets.

The tap target <a href="http://www.cod…f.com/aboutus/">About CodeChef</a> is close to 1 other tap targets.

The tap target <a href="http://www.directi.com/">About Directi</a> and 3 others are close to other tap targets.

The tap target <a href="http://directi.com">Directi Group</a> and 2 others are close to other tap targets.

The tap target <a href="https://www.codechef.com/ide">Online IDE</a> and 15 others are close to other tap targets.
The tap target <a href="http://www.bigrock.in/">Domain Registration in India</a> and 1 others are close to other tap targets.

codechef.com Mobile Resource Breakdown

Total Resources94
Number of Hosts16
Static Resources61
JavaScript Resources32
CSS Resources5

codechef.com HTML validation

Errors

Bad start tag in “img” in “head”.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

Element “head” is missing a required instance of child element “title”.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

Bad value “https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1” for attribute “src” on element “img”: Tab, new line or carriage return found.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 36 Column: 9 - 23
"...> <img height="1" width="1" src="https://www.facebook.com/tr?id=277309139459596&ev=PageView &noscript=1"/> ..."

Stray end tag “noscript”.

Line: 37 Column: 9 - 19
"...> </noscript> ..."

A “charset” attribute on a “meta” element found after the first 1024 bytes.

Line: 38 Column: - 63
"... charset="utf-8"> <link rel..."

Attribute “charset” not allowed on element “meta” at this point.

Line: 38 Column: 43 - 64
"...Code --> <meta charset="utf-8"> <l..."

Element “meta” is missing one or more of the following attributes: “content”, “itemprop”, “property”.

Line: 38 Column: 43 - 64
"...Code --> <meta charset="utf-8"> <l..."

A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.

Line: 38 Column: 43 - 64
"...Code --> <meta charset="utf-8"> <l..." Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..."

A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.

Line: 47 Column: 3 - 57
"...com" /> <link rel="canonical" href="http://www.codechef.com/"/> <s..." Line: 55 Column: 1 - 73
"...mming" /> <link rel="shortcut icon" href="/misc/favicon.ico" type="image/x-icon" /> <scri..."

Element “title” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Line: 50 Column: 2 - 8
".../script> <title> Pro..."

Attribute “http-equiv” not allowed on element “meta” at this point.

Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..."

Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.

Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..." Line: 53 Column: 1 - 128
"...utf-8" /> <meta name="keywords" content="programming competition, programming contest, online programming, online computer programming" /> <meta..." Line: 54 Column: 1 - 187
"...mming" /> <meta name="description" content="Programming Competition: Join Online Programming Contest. CodeChef hosts Online Programming Competition, Programming Contest and Computer Programming" /> <link..." Line: 82 Column: 1 - 94
"...</script> <meta name="google-site-verification" content="u_r-UtobgmZQQ9jZd9_KqvQl-qc42N6HE0TOBxeWghg" /> </hea..."

A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.

Line: 52 Column: 1 - 69
"...g</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta..."

Attribute “name” not allowed on element “meta” at this point.

Line: 53 Column: 1 - 128
"...utf-8" /> <meta name="keywords" content="programming competition, programming contest, online programming, online computer programming" /> <meta..." Line: 54 Column: 1 - 187
"...mming" /> <meta name="description" content="Programming Competition: Join Online Programming Contest. CodeChef hosts Online Programming Competition, Programming Contest and Computer Programming" /> <link..." Line: 82 Column: 1 - 94
"...</script> <meta name="google-site-verification" content="u_r-UtobgmZQQ9jZd9_KqvQl-qc42N6HE0TOBxeWghg" /> </hea..."

Stray end tag “head”.

Line: 83 Column: 1 - 7
"...eWghg" /> </head> <body..."

Start tag “body” seen but an element of the same type was already open.

Line: 84 Column: 1 - 24
"...> </head> <body class="sidebars"> <!-..."

Cannot recover after last error. Any further errors will be ignored.

Line: 84 Column: 1 - 24
"...> </head> <body class="sidebars"> <!-..."

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codechef.com Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.


codechef.com TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.