<story><title>Fast Inverse Square Root</title><url>http://blog.quenta.org/2012/09/0x5f3759df.html</url></story><parent_chain></parent_chain><comment><author>ColinWright</author><text>In case anyone is interested in reading other accounts and the HN discussions that accompany them, here are a few previous submissions of other articles:&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=213056&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=213056&lt;/a&gt; &amp;#60;- Some comments&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=419166&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=419166&lt;/a&gt; &amp;#60;- Some comments&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=573912&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=573912&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=896092&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=896092&lt;/a&gt; &amp;#60;- Some comments&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=1599635&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=1599635&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=2332793&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=2332793&lt;/a&gt; &amp;#60;- Some comments&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=3115168&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=3115168&lt;/a&gt; &amp;#60;- Some comments&lt;p&gt;&lt;a href=&quot;http://news.ycombinator.com/item?id=3259199&quot; rel=&quot;nofollow&quot;&gt;http://news.ycombinator.com/item?id=3259199&lt;/a&gt;</text></comment>
<story><title>Fast Inverse Square Root</title><url>http://blog.quenta.org/2012/09/0x5f3759df.html</url></story><parent_chain></parent_chain><comment><author>jimminy</author><text>I&apos;ve always liked the post provided by BetterExplained[0], but this article is more thorough while remaining simple. Would probably still use the BetterExplained post for a first introduction, I think.&lt;p&gt;[0]:&lt;a href=&quot;http://betterexplained.com/articles/understanding-quakes-fast-inverse-square-root/&quot; rel=&quot;nofollow&quot;&gt;http://betterexplained.com/articles/understanding-quakes-fas...&lt;/a&gt;</text></comment>