R2D3.US R2D3: Statistics and Data Visualization

r2d3.us Website Information

Daily Unique Visits: 4,990

Daily Page Views: 19,960

Income Per Day: $56

Estimated Value: $30,240

This website is located in United States and is using following IP address 192.64.119.175. See the complete list of popular websites hosted in United States.

r2d3.us is registered under .US top-level domain. Please check other sites in .US zone.

Website r2d3.us is using the following name servers:

  • dns1.registrar-servers.com
  • dns2.registrar-servers.com

and is probably hosted by NAMECHEAP-NET - Namecheap, Inc., US. See the full list of other websites hosted by NAMECHEAP-NET - Namecheap, Inc., US.

The highest website r2d3.us position in Alexa rank database was 24700 and the lowest rank position was 996466. Current position of r2d3.us in Alexa rank database is 251480.

Desktop speed score of r2d3.us (80/100) is better than the results of 69.89% of other sites and shows that the page is performing great on desktop computers.

Mobile usability score of r2d3.us (94/100) is better than the results of 36.81% of other sites and means that the page is mobile-friendly.

Mobile speed score of r2d3.us (70/100) is better than the results of 76.43% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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r2d3.us 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.


r2d3.us 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: r2d3.us
Registry Domain ID: D46111992-US
Registrar WHOIS Server: whois.namecheap.com
Registrar URL: http://www.namecheap.com
Updated Date: 2020-06-11T04:47:11Z
Creation Date: 2014-07-27T21:19:29Z
Registry Expiry Date: 2023-07-26T23:59:59Z
Registrar: NameCheap, Inc.
Registrar IANA ID: 1068
Registrar Abuse Contact Email: abuse@namecheap.com
Registrar Abuse Contact Phone: +1.6613102107
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: C3F4164528E4D491587398C34ADE0FEDC-NSR
Registrant Name: Stephanie Yee
Registrant Organization:
Registrant Street: 508 octavia st apt 2
Registrant Street:
Registrant Street:
Registrant City: SAN FRANCISCO
Registrant State/Province: CA
Registrant Postal Code: 94102
Registrant Country: US
Registrant Phone: +1.6024560933
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: 0a3f91604b6cf379846fb8893fde220f-1941044@contact.gandi.net
Registrant Application Purpose: P3
Registrant Nexus Category: C12
Registry Admin ID: CC87E84DC609C4F25B60044CFD9D6FFEB-NSR
Admin Name: Stephanie Yee
Admin Organization:
Admin Street: 508 octavia st apt 2
Admin Street:
Admin Street:
Admin City: SAN FRANCISCO
Admin State/Province: CA
Admin Postal Code: 94102
Admin Country: US
Admin Phone: +1.6024560933
Admin Phone Ext:
Admin Fax:
Admin Fax Ext:
Admin Email: 0a3f91604b6cf379846fb8893fde220f-1941044@contact.gandi.net
Registry Tech ID: C1E02000484F6485E8DF9B7DDCE1521AB-NSR
Tech Name: Stephanie Yee
Tech Organization:
Tech Street: 508 octavia st apt 2
Tech Street:
Tech Street:
Tech City: SAN FRANCISCO
Tech State/Province: CA
Tech Postal Code: 94102
Tech Country: US
Tech Phone: +1.6024560933
Tech Phone Ext:
Tech Fax:
Tech Fax Ext:
Tech Email: 0a3f91604b6cf379846fb8893fde220f-1941044@contact.gandi.net
Name Server: dns1.registrar-servers.com
Name Server: dns2.registrar-servers.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2022-01-21T22:34:07Z

r2d3.us server information

Servers Location

r2d3.us desktop page speed rank

Last tested: 2017-05-19


Desktop Speed Medium
80/100

r2d3.us Desktop Speed Test Quick Summary


priority - 9Optimize images

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priority - 7Leverage 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://cdn.syndication.twimg.com/tweets.json?call…ss_response_codes=true (60 seconds)
http://connect.facebook.net/en_US/sdk.js (20 minutes)
http://platform.twitter.com/widgets.js (30 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
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http://www.r2d3.us/static/app/global/style.css (12 hours)
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http://www.r2d3.us/static/pages/decision-trees-par…ree-training-set-98.js (12 hours)
http://www.r2d3.us/static/pages/decision-trees-part-1/styles.css (12 hours)

priority - 4Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking CSS resources. This causes a delay in rendering your page.

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http://www.r2d3.us/static/app/global/style.css
http://www.r2d3.us/static/pages/decision-trees-part-1/styles.css

priority - 3Avoid landing page redirects

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

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http://r2d3.us/
http://www.r2d3.us/
http://www.r2d3.us/visual-intro-to-machine-learning-part-1/

priority - 0Minify JavaScript

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r2d3.us Desktop Resource Breakdown

Total Resources36
Number of Hosts15
Static Resources25
JavaScript Resources10
CSS Resources5

r2d3.us mobile page speed rank

Last tested: 2017-05-14


Mobile Speed Medium
70/100

r2d3.us Mobile Speed Test Quick Summary


priority - 16Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

http://www.r2d3.us/static/app/_bower_components/bo…/css/bootstrap.min.css
http://www.r2d3.us/static/app/global/style.css
http://www.r2d3.us/static/pages/decision-trees-part-1/styles.css

priority - 10Leverage 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.

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https://cdn.syndication.twimg.com/tweets.json?call…ss_response_codes=true (60 seconds)
http://connect.facebook.net/en_US/sdk.js (20 minutes)
http://platform.twitter.com/widgets.js (30 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
http://www.r2d3.us/static/app/_bower_components/bo…/css/bootstrap.min.css (12 hours)
http://www.r2d3.us/static/app/global/jadeyee.jpg (12 hours)
http://www.r2d3.us/static/app/global/r2d3-large-white.png (12 hours)
http://www.r2d3.us/static/app/global/r2d3-logo.png (12 hours)
http://www.r2d3.us/static/app/global/style.css (12 hours)
http://www.r2d3.us/static/app/global/tonyhschu.jpg (12 hours)
http://www.r2d3.us/static/app/global/world.png (12 hours)
http://www.r2d3.us/static/dist/4ad037ea507e656b444af6676b9aead6.js (12 hours)
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http://www.r2d3.us/static/pages/decision-trees-par…ree-training-set-98.js (12 hours)
http://www.r2d3.us/static/pages/decision-trees-part-1/styles.css (12 hours)

priority - 10Avoid 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://r2d3.us/
http://www.r2d3.us/
http://www.r2d3.us/visual-intro-to-machine-learning-part-1/

priority - 7Optimize images

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priority - 0Minify JavaScript

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Minifying http://www.r2d3.us/static/pages/decision-trees-par…ree-training-set-98.js could save 4.2KiB (18% reduction) after compression.

r2d3.us Mobile Resource Breakdown

Total Resources36
Number of Hosts15
Static Resources25
JavaScript Resources10
CSS Resources5

r2d3.us mobile page usability

Last tested: 2017-05-14


Mobile Usability Good
94/100

r2d3.us Mobile Usability Test Quick Summary


priority - 3Size content to viewport

The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.

The page content is 748 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:

The element <div id="rotating-canvas"></div> falls outside the viewport.

priority - 2Size 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 <a id="logo" href="/" class="hide-text">R2D3</a> is close to 1 other tap targets.

The tap target <a href="http://t.co/g75lLydMH9" class="link customisable">http://www.r2d…ning-part-1/ …</a> and 5 others are close to other tap targets.
The tap target <a href="https://twitte…81063893864449" class="u-linkBlend u-…long-permalink">7:56 AM - 27 Jul 2015</a> is close to 1 other tap targets.
The tap target <a href="https://cardiogr.am">Cardiogram</a> and 9 others are close to other tap targets.

r2d3.us HTML validation

Errors

Stray end tag “a”.

Line: 98 Column: 32 - 35
"...图解机器学习">简体</a> ..." Line: 100 Column: 81 - 84
"... Indonesia</a> ..." Line: 102 Column: 79 - 82
"...">Français</a> ..." Line: 104 Column: 35 - 38
"...器學習第一章">中文</a> ..." Line: 106 Column: 77 - 80
"...я">русский</a> ..." Line: 108 Column: 72 - 75
"...ar">لعربية</a> ..." Line: 110 Column: 82 - 85
"...>Português</a> ..." Line: 112 Column: 65 - 68
"...ic-1">Türk</a> ..." Line: 114 Column: 81 - 84
"...1">Deutsch</a> ..." Line: 116 Column: 76 - 79
"...1">Español</a> ..." Line: 118 Column: 75 - 78
"...">ελληνικά</a> ..." Line: 120 Column: 78 - 81
"...">Italiano</a> ..."

Duplicate attribute “class”.

Line: 234 Column: - 39
"...the-tree" class="tracking-sect..." Line: 246 Column: - 33
"...af-nodes" class="tracking-sect..."

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r2d3.us 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.


r2d3.us 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.