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	<title>Comments on: Twitter to Bite the PHP Bullet?</title>
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	<description>Quick and Dirty Web Development for Web 2.0: CakePHP, Prototype, JQuery, and lots more.</description>
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		<title>By: Colleen</title>
		<link>http://www.webdevelopment2.com/twitter-bite-php-bullet/comment-page-1/#comment-27501</link>
		<dc:creator>Colleen</dc:creator>
		<pubDate>Tue, 13 May 2008 07:11:40 +0000</pubDate>
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		<description>I just heard that the rumor twitter is abandoning rails is false.  The real truth I was told is that twitter is partly on the rails platform and partly just in pure ruby.  and the commentator ahead of me is right.  It&#039;s probably really  about the database</description>
		<content:encoded><![CDATA[<p>I just heard that the rumor twitter is abandoning rails is false.  The real truth I was told is that twitter is partly on the rails platform and partly just in pure ruby.  and the commentator ahead of me is right.  It&#8217;s probably really  about the database</p>
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		<title>By: Arachne Jericho</title>
		<link>http://www.webdevelopment2.com/twitter-bite-php-bullet/comment-page-1/#comment-27498</link>
		<dc:creator>Arachne Jericho</dc:creator>
		<pubDate>Sat, 10 May 2008 20:08:50 +0000</pubDate>
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		<description>PHP versus Rails is a non-starter when it comes to web applications.  The bottleneck is the database---or in Twitter&#039;s case, the bottleneck is the sheer amount of communication that happens over Twitter.  It&#039;s like a clique graph; if all users just followed 100 followers, that would be fine.  Unfortunately, some follow some thousands, and the number of updates Twitter must coordinate is immense. 

That&#039;s the bottleneck. It&#039;s massive and not easily solved---certainly not by switching languages. 

Whether they use Rails or PHP doesn&#039;t come anywhere near it. 

Many people have no idea what it takes to scale truly large systems.  Now I must count TechCrunch among them.  Sigh.</description>
		<content:encoded><![CDATA[<p>PHP versus Rails is a non-starter when it comes to web applications.  The bottleneck is the database&#8212;or in Twitter&#8217;s case, the bottleneck is the sheer amount of communication that happens over Twitter.  It&#8217;s like a clique graph; if all users just followed 100 followers, that would be fine.  Unfortunately, some follow some thousands, and the number of updates Twitter must coordinate is immense. </p>
<p>That&#8217;s the bottleneck. It&#8217;s massive and not easily solved&#8212;certainly not by switching languages. </p>
<p>Whether they use Rails or PHP doesn&#8217;t come anywhere near it. </p>
<p>Many people have no idea what it takes to scale truly large systems.  Now I must count TechCrunch among them.  Sigh.</p>
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